DE202008017199U1 - Surgical rasp handle and surgical rasp - Google Patents

Abstract

surgical Rasp handle (12) for releasable connection to a rasp body (14) by means of a coupling mechanism (30) for forming a surgical rasp (10), the rasp handle (12) having a first Bearing surface (82), which in a connection position, in which the rasp body (14) and the rasp handle (12) connected to each other at a second contact surface (24) of the rasp body (14) rests, wherein the rasp handle (12) a first coupling element (32) is formed or arranged is, which forms part of the clutch mechanism (30) and in the connecting position with a second, on the rasp body (14) trained or arranged coupling element (34) force and / or positive or substantially non-positive and / or positive is engageable, wherein the first coupling element (32) a coupling receptacle (50) for one on the rasp body (14) projecting coupling projection (38) and one on the rasp handle (12) movably mounted first coupling member (66) provided which has at least one coupling member section (76), which in the connecting position at least partially in the coupling receptacle (50) dives in and ...

Description

The The present invention relates to a surgical rasp handle for releasably connecting to a rasp body by means of a coupling mechanism for forming a surgical rasp, wherein the rasp handle identifies a first contact surface, which in a connecting position, in which the rasp body and the rasp handle are connected together, at a second Rests contact surface of the rasp body, wherein formed or arranged on the rasp handle a first coupling element is, which forms part of the clutch mechanism and in the Connection position with a second, on the rasp body trained or arranged coupling element force and / or positive or substantially non-positive and / or positive is engageable, wherein the first coupling element a Coupling receptacle for a projecting on the rasp body Clutch projection includes and a movably mounted on the rasp handle first coupling member is provided, which at least one coupling member section which, in the connecting position at least partially immersed in the coupling receptacle and in a release position, in which the rasp handle detachable from the rasp body is, with the coupling receptacle disengaged.

Further The present invention relates to a surgical rasp with a rasp body, a rasp handle and a clutch mechanism for detachably connecting the rasp body and the Rasp handle, wherein the Raspelgriff a first and the Raspelkörper have a second contact surface, which in a connecting position, in which the rasp body and the rasp handle with each other are connected, abut each other, which clutch mechanism a first, arranged on the rasp handle or trained coupling element and a second one formed on the rasp body Coupling element comprises, which in the connecting position force and / or positive or substantially power and / or positively engage with each other, wherein the first coupling element a Coupling receptacle for a projecting on the rasp body Clutch projection includes and a movably mounted on the rasp handle first coupling member is provided, which at least one coupling member section which, in the connecting position at least partially immersed in the coupling receptacle and in a release position, in which the rasp handle detachable from the rasp body is, with the coupling receptacle disengaged.

surgical Rasps of the type described are used in surgery for used many purposes. In particular, they serve to a bone bed to prepare for receiving an implant part. For example Bone rasps are used to create a cavity in one Preparing femur for receiving a shaft of a hip joint endoprosthesis.

A rasp of the type described is for example from the US 6,663,636 B1 known. With a curved and weakly elastic rod, the first coupling member can be kept in the connecting position with the at least one coupling member section immersed in the coupling receptacle, resiliently biased. However, it is not excluded that, in particular when turning the rasp the connection between the coupling elements and thus can be solved between the rasp handle and the rasp body. This is particularly disadvantageous in minimally invasive surgical procedures, because then only with some effort a connection between the rasp body and the rasp handle must be made. Furthermore, with the known rasps, it is practically impossible to produce a play-free connection between the rasping handle and the rasping body, so that the use of the rasping device using a navigation system for determining a position and / or orientation of the rasping in an operating theater is possible, However, the position and / or orientation of the rasp body can not be determined with the desired and often required precision when a reference unit detectable by the navigation system is arranged on the rasp handle.

It is therefore an object of the present invention, a surgical Rasp handle and a surgical rasp the described above Art to improve so that a handling of the same, in particular in minimally invasive operations and using a navigation system, easier, safer and more accurate.

These Task is a surgical rasp handle described above Art solved according to the invention that the coupling receptacle a non-circularly curved pressure surface or has at least two converging pressure surfaces, against which the coupling projection by means of the first coupling member can be pressed in the connection position.

The inventively proposed development makes it possible to bring the coupling projection of the rasp body in a defined manner and play with the coupling receptacle in engagement. The first coupling member thus forms a pressing member, which can force the coupling projection into a defined and always the same position due to the special shape of the coupling receptacle when the rasp handle occupies the connecting position. In the connecting position, the first coupling member presses the coupling projection in always exactly the same way against the non-circularly curved pressure surface or against the at least two converging pressure surfaces. Thus, the rasp can also be used navigated by the play-free connection of the rasp handle and the rasp body, since the position and / or orientation of the rasp body can be determined with the same accuracy from the position and / or orientation of a rasp handle arranged referencing unit of a surgical navigation system , Thus, the present invention further developed rasp handle for performing high-precision surgical procedures.

Preferably are provided two converging pressure surfaces, which are inclined relative to each other and between them a wedge angle define. Such a configuration is particularly easy to make. Furthermore, a clearly defined Form are given to a relative position of the coupling projection and the coupling receptacle in the connecting position clearly define. In particular, a cutting line of the convergent Surfaces parallel or substantially parallel to one extend from the coupling receptacle defined longitudinal axis.

Advantageous it is when the at least one coupling member section at the transition from the release position in the connection position in the direction on the curved pressure surface or the at least two relatively inclined pressure surfaces is movable. This embodiment makes it possible, in particular, over the at least one coupling member portion a pressing force on the Exerting coupling projection and so the coupling projection in a defined manner against the non-circularly curved pressure surface or against the at least two converging pressure surfaces to press. So can a defined deadlock of the coupling projection and the coupling receptacle can be achieved.

Cheap it is when the at least one coupling member section at the transition from the release position in the connection position in one Direction transversely or substantially transversely to one of the coupling receptacle defined longitudinal axis is movable. In particular, can such a pressure force on the non-circularly curved pressure surface or the at least two converging pressure surfaces be exercised vertically or substantially vertically. This allows optimum compression of the coupling projection against the coupling receptacle and thus a particularly good and safe Connection of the rasp handle with the rasp body.

Preferably the coupling receptacle has a deviating from a circular shape Cross-section on. Such a cross section of the coupling receptacle allows the formation of an anti-rotation, namely in a simple way, because of the special cross-sectional shape can be a rotation about the longitudinal axis of the coupling receptacle with a correspondingly formed second coupling element of the Raspelkörpers be prevented. In question are all possible and conceivable, deviate from a circular shape the cross sections, in particular Three-, four- or pentagons, which rounded corners and optionally also one or more curved sides can have. Star and cross-shaped cross sections and any combinations of the described cross-sectional shapes also conceivable. A variant can in particular also two or has more converging surface which intersect, for example, in a section line parallel to one of the coupling receiving defined longitudinal axis extends.

Around to prevent the rasp handle and the rasp body relative to each other about a longitudinal axis of the first and / or second coupling element can be rotated in the connecting position, it is advantageous if the coupling mechanism an anti-rotation includes preventing twisting of the rasp handle and the rasp body around the first longitudinal axis in the connecting position.

On a particularly simple way can be the rotation form when in the form of a positive connection between the first and second coupling element is formed.

It is advantageous if a coupling member position assurance device is provided which exerts a lower force in the release position and / or the connection position on the first coupling member than in at least one intermediate position during transfer of the first coupling member from the release position to the connecting position and / or vice versa. Such a development of a rasp handle, in particular a rasp handle of the type described above, allows the use of the rasp handle in minimally invasive surgical procedures in a simple manner. The coupling member position assurance device enables a simple way of securing the coupling member in the connecting position. Due to its special design, it is particularly suitable for deliberately promoting a transition into the release position or quite specifically a transition into the connection position. This can be achieved in particular by applying a lower force to the first coupling member in the release position or in the connection position than in the at least one intermediate position when transferring the first coupling member from the release position into the connection position vice versa. From a certain intermediate position forces the coupling member position assurance device either the transition of the rasp handle in the release position or in the connection position. A transfer of the rasp handle from the release position to the connecting position or vice versa by an operator is additionally supported. Furthermore, at the same time also a backup of the rasp handle in one or the other position, since a transition must be made, for example, from the release position in the connection position again on the at least one intermediate position in which the coupling member position assurance device exerts a greater force on the first coupling member in the release position. In this way, an accidental release by the coupling member position assurance device, unlike that in the from US 6,663,636 B1 known rasp handle is the case, in a simple and safe way prevented.

Cheap it is when the coupling member position assurance device at least a first securing member, which by the first coupling member from a basic position against the force effect of a biasing Elements in a deflected position can be brought. Such a security member conversely, allows the first coupling member a To exercise power, depending on his Deflection from the basic position. So it is possible with the first securing member optionally the release position or the connection position of the rasp handle by exerting force to secure on the first coupling member.

Especially simply the structure of the coupling member position assurance device, if formed the biasing element in the form of a spring element is.

advantageously, are the first securing member and the biasing member part a ball pressure piece. This simplifies a mounting of the Rasp handle and overall the structure of the same.

conveniently, the biasing element is arranged such that one of it exercisable force across or substantially transverse to one directed by the coupling receptacle defined longitudinal axis is. Thus, depending on the storage of the first coupling member, in particular in a swivel bearing of the same, an optimal introduction of force reached from the first securing member to the first coupling member become.

Advantageous it is when the coupling member position assurance device a on the first coupling member arranged selection member to support a movement of the first coupling member from the intermediate position in the release position or the connection position comprises. The selection element is preferably applied to the first securing member, what makes it possible, the first coupling member so with a Force to apply it from the intermediate position preferably in the release position or in the connection position can be brought is.

Especially simply the selection element can be in the form of a selective projection form. In particular, the furthest from the first coupling member projecting portion of the selection projection the at least one Define intermediate position in which the first securing member a greater force on the first coupling member exercises as in the release or connection position.

Cheap it is when the selection member at least a first sliding surface at which the first securing member during transfer of the first coupling member of the at least one intermediate position slid into the connecting position while the first coupling member moved to the connection position. The at least one first sliding surface facilitates the transition from the at least one Intermediate position in the connection position. She can be so special also a movement path of the first coupling member relative to the first Define securing element.

Especially simply the construction of the rasp handle when the first sliding surface a distal facing side surface of the selection projection forms. The first securing member can by pressing against the first sliding surface with appropriate storage of the Coupling link this easily and safely transfer into the connection position and keep in this.

Of Furthermore, it is favorable if the selection element is at least a second sliding surface on which the first Securing member during transfer of the first coupling member slides from the at least one intermediate position in the release position and while the first coupling member in the release position emotional. The first securing member can thus at least one slide along the second sliding surface and thereby the first Coupling member with appropriate storage of the same to simple Force the way from the intermediate position to the release position and keep in this.

Especially simply the embodiment of the selection projection, if the second sliding surface one substantially in the proximal Direction facing side surface of the selection projection forms.

In a simple way, the intermediate position can be defined, if the selection projection a in a direction transverse to a longitudinal axis defined by the coupling receptacle and in the direction of the securing member facing toward the tip or edge. When the first securing member slides along the selection projection, it is pushed away from the first coupling member by the tip or edge, against the action of the biasing member, so that the largest force exerted by the biasing member on the first securing member and thus on the first coupling member maximum is when the first securing member abuts the tip or edge.

Preferably the tip or edge is rounded. This embodiment avoids a jerky transition from the release position in the connection position or vice versa.

Preferably the coupling member position assurance device is on the proximal side the coupling receptacle and arranged in the vicinity thereof. Thus, in particular, the first coupling member and thus Also, the rasp handle overall be made particularly compact. In particular for minimally invasive interventions such a particularly small design can be achieved, which is a simple and secure insertion of a distal end of the rasp handle with or without a grater body connected to it through a minimally invasive access into a human or animal body allows. The proximal-sided arrangement of the coupling member position assurance device based on the coupling receptacle avoids a direct intervention in the area the coupling receptacle and allows in the coupling receiving area a minimal small design.

in principle it would be conceivable, the first coupling member slidably store on the rasp handle. The design becomes particularly simple the rasp handle, however, when the first coupling member to a first Swivel axis is pivotally mounted. In particular, so by the first securing member in a simple and secure manner a desired Torque for transferring the first coupling member from the release position to the connection position or vice versa be exercised.

Around the rasp handle easy and safe in the release position To be able to secure, it is favorable, if in the Release position the selection member distally or substantially on the distal side of the first securing member and the first pivot axis connecting line is positioned. This can be guaranteed be that the first securing member with a distally facing component presses against the first coupling member and holding this in the release position.

Advantageous it is, if in an intermediate position the selection member on or essentially on a first securing member and the first pivot axis connecting line is positioned. In this way can be defined as a kind of dead center, which in particular the at least one intermediate position between the release position and can define the connection position. The described intermediate or dead center makes it possible, in particular by defined force on the first coupling member the rasp handle in a defined manner either in the release position or to transfer into the connection position, namely starting from the dead center position.

Cheap it is, if in the connection position the selection member on the proximal side or substantially proximal side of the first securing member and the connecting line connecting the first pivot axis is. For example, it can be achieved that the first securing member in the connecting position in the proximal direction against the first Clutch member presses and it so in the connection position holds.

Easy and certainly a connection between the first coupling member and a second, provided on the rasp body coupling element be prepared when the first coupling member a Kupplungsgliedausnehmung in which a corresponding projection on the second Coupling element can engage in the connection position. So can in particular easily a force and / or positive connection between the first coupling member and the second coupling element getting produced.

A Connection in the connecting position between the rasp handle and the rasp body can be further improved if the first coupling member has a coupling member projection, which in a corresponding recess on the second coupling element can engage in the connection position. In particular, so can optionally an additional non-positive and / or positive fit Connection between the first coupling member and the second coupling element getting produced.

In a simple and secure manner, the coupling elements can be engaged with each other when the Kupplungsgliedausnehmung and the coupling member projection are positioned distal to the first pivot axis. This makes it possible, by simply pivoting the first coupling member, to release the coupling member receptacle in the release position so that the coupling member projection and the coupling member receptacle with the corresponding counterparts on the second coupling element disengaged can be.

advantageously, have the Kupplungsgliedausnehmung and the coupling member projection in a direction transverse or substantially transverse to the first longitudinal axis. By this orientation, in particular thrust and Pull tensile forces easily and safely from the rasp handle to the rasp body when they are connected.

conveniently, runs one defined by the coupling receptacle first Longitudinal axis perpendicular or substantially perpendicular to first contact surface. This allows the rasp handle for example, perpendicular to the first contact surface and parallel to the first longitudinal axis to the Raspelkörper introduce, to connect him with this. In particular, it is also possible form the rasp handle in such a way that it with rasp bodies different families of prostheses can be connected. One Rasp handle is then enough, for example, to as needed with be connected to a variety of rasp bodies. This clearly helps the number of rasp handles to be provided to minimize.

conveniently, the first and second contact surfaces are flat. Preferably they are completely flat except for the respective coupling elements. This allows the rasp body so in the to introduce bone cavity to be machined that the second contact surface, for example, in a resection level of the femur. So no parts of the Raspelkörpers protrude into the wound area and can thus a surgeon Do not interfere during the procedure. This is special particularly beneficial in minimally invasive procedures.

The Handling of the rasp handle and the associated rasp body is greatly simplified and improved when the first and the second abutment planes define which transverse or in the Substantially transverse to longitudinal axes of the rasp handle and / or of the rasp body. In particular, they are lost transverse or substantially transverse to longitudinal axes of sections of the rasp handle and the rasp body, which are the first or second contact surface. So can one Operators directly recognize in which direction a connection between the rasp body and the rasp handle are made can. Furthermore, forces can be so direct in one Connection direction, which by, for example, longitudinal axes the coupling elements is defined to be initiated.

According to one Another preferred embodiment of the invention a part of the clutch mechanism forming release / locking lever be provided, which is mounted pivotably and / or displaceably and coupled directly or indirectly to the first coupling member is. Preferably, the release / lock lever is directly on Rasp handle pivotally mounted. By the storable storage can in particular high actuation forces introduced and transmitted to the first coupling member become.

Especially can form stable the coupling mechanism, if the first coupling member with the release / lock lever via a Power transmission mechanism is movably coupled. Of the Power transmission mechanism allows the basically in different and arbitrary ways arranged on the rasp handle and movably mounted release / locking lever and to connect the first coupling member together so that a Actuating force from the release / lock lever can be transferred to the first coupling member.

Cheap it is when the power transmission mechanism is a pivot lever includes, which pivotable on the release / locking lever and / or is slidably coupled. In the manner described can be Swivel lever easy and safe with the release / lock lever movably connected so that due to a movement of the release / locking lever over the pivot lever directly or indirectly an actuating force can be transferred to the first coupling member.

Especially simply the structure of the rasp handle when the pivot lever is pivotally coupled to the first coupling member. optional it would be conceivable that the pivot lever with the first coupling member alternatively or in addition also slidably coupled is. In particular, the pivotable coupling allows a displacement or movement compensation of the pivot lever between the Release / lock lever and the first coupling member.

In principle, it would be conceivable to couple the pivot lever, on the one hand, with the release / locking lever and, on the other hand, with the first coupling member in a movable manner. Conveniently, the pivot lever is pivotably and / or slidably coupled to a push and pull member movably connected to the release / lock lever or the first coupling member. The push and pull member allows a particularly defined introduction of force starting from the release / locking lever to the first coupling member by means of the pivot lever and the push and pull member. The pivot lever may be selectively connected to the release / lock lever or the first coupling member, the push and pull member with the pivot lever and the other part the rasp handle, that is with the release / lock lever or the first coupling member. Furthermore, so also manufacturing tolerances can be compensated easily and safely.

advantageously, the rasp handle comprises a first guide device for guiding a movement of the push and pull member at the transition from the connection position to the release position and vice versa. The Führungseinrich device can in principle the movement of the Define push and pull elements along any path, that is, in particular along a straight and / or single and / or multiple curved track.

Cheap it is when the first guide means a first direction of movement parallel or substantially parallel to one of the coupling receptacle defined longitudinal axis defined. This configuration allows a very slim design of the rasp handle, especially directly adjacent and also in extension of the first coupling element.

According to one Another preferred embodiment of the invention be provided that the rasp handle a second guide device for guiding a movement of the push and pull member relative to the first coupling member at the transition from the connection position in the release position and vice versa. The second guide device allows it, a power transmission from the push and pull member, which is moved along a straight line, on the first To achieve coupling member, which is pivotable on the rasp handle is stored. Thus, in particular, an additional lock and optionally a power boost during transmission one introduced via the release / lock lever Operating force reached on the first coupling member become.

Further It may also be advantageous if the rasp handle a third Guiding device for guiding a movement the release / locking lever relative to the pivot lever from the connection position to the release position and vice versa includes. This embodiment is particularly advantageous when the pivot lever on the one hand with the release / lock lever and on the other hand connected to the first coupling member and at the same time a connection of the pivot lever and the first coupling member realized in the form of a pure rotary bearing. So can easy on Way a path compensation between a pan and a translational movement be achieved.

Especially easy is the structure of the management facilities, though the first, second and / or third guide means respectively is formed by a slot cam guide.

In order to the rasp handle is not inadvertently inadvertently from the, grating body can solve, it is advantageous if a locking device is provided for locking of the rasp handle in the connecting position.

Especially simply the locking device can be formed, when it is configured to lock the release / lock lever on the rasp handle in the connecting position.

A Locking can be achieved in a simple way that the locking device at least a second securing member comprising, which in the release position with the release / lock lever out of engagement and in a locking position with the Release / locking lever is engaged. Then, when the at least one second securing member with the release / locking lever is in particular a movement of the same relative to the grater handle are prevented, which at the same time a movement the first coupling member with a corresponding coupling of the release / locking lever prevented with the first coupling member.

Preferably is the locking device in the connecting position in the Locking position brought. For example, it can be so formed be that only when the rasp handle the connection position occupies, the locking device in the locked position can be transferred is, for example, a movement of the first coupling member to prevent.

A simple and secure locking in the locked position can be made possible in particular by the release / locking lever and the at least one second securing member in the locking position non-positively and / or positively engaged. At least that's how it can be a Relativbe movement of the release / locking lever relative to at least one securing member in the locking position be prevented.

In principle, it would be conceivable for the at least one second securing member to be pivotably mounted on the rasp handle. Conveniently, however, it is slidably mounted on the rasp handle. So the rasp handle can be made very slim overall. In particular, the at least one second securing member can be arranged so that it assumes the locking position in its most distal position. In other words, this means that it can then be moved in the proximal direction in order to unlock the locking device, which then simultaneously allows movement of the first coupling member in the proximal or substantially proximal direction. The verbin training position and the locking position are the same orientation in such a case, that is, a connection or locking takes place in each case in a distal position, the release or unlocking in each case in a proximal position of the respective movably mounted elements.

Especially easily can be at least a second securing member Arrange on the rasp handle when it is parallel or substantially parallel to a longitudinal axis defined by the rasp handle is movable. The longitudinal axis may also be a longitudinal axis a non-negligible portion of the rasp handle act, such as a proximal or distal portion thereof.

Around ensure that the rasp handle does not self-operate from the grater body, it is convenient if the at least one second securing member in a basic position the locking position occupies. The at least one second securing member So must to unlock the locking device active from an operator to be moved.

In order to it can be ensured that the at least one second securing member in a basic position assumes the locking position, it is convenient if the at least one second securing element forcibly in the basic position is held.

Preferably the at least one second securing member is resiliently biased held in the basic position. So it is possible, for example with a simple spring element, for example a coil spring or a leaf spring, the at least one second securing member to hold in the basic position.

Cheap it may also be when the at least one second securing member is held by a restoring device in the basic position. The reset device makes it possible in particular the at least one deflected from the basic position second securing member back to the basic position to convict. The restoring device can in particular in the form of a elastically resilient element, such as a screw, plate or leaf spring may be formed.

According to one preferred embodiment of the invention can also be provided be that the at least one second securing member a first securing projection or a first securing recess, which in the locked position with a corresponding second securing recess or a corresponding second securing projection of the release / locking lever engaged. By simply engaging the at least a second securing member with the corresponding element of the release / locking lever so the locking position can be defined defined.

Around the at least one second securing member in the desired To be able to move, for example, to transfer the locking device of the locking position in the Release position and / or vice versa, it is advantageous if the at least one second securing member at least one operating portion which has an outer contour the rasp handle protrudes. On the one hand, an operator can do this immediately recognize a position of the locking device and the other operate the locking device, for example enable or disable them.

to Improvement of the ergonomics of the rasp handle is favorable, when the release / lock lever in the locked position a part of an outer contour of the rasp handle forms. The release / locking lever is then not in particular from the remaining part of the rasp handle. This allows, for example, that an operator holding the rasp handle the release / lock lever at the same time with embraces and thus additionally in the Locking position holds.

Cheap it is when the release / locking lever in the form or is formed substantially in the form of a toggle lever, with which an introduced into an operating part locking force for transmission can be amplified on the first coupling member. Especially the release / lock lever can be two different having long legs, wherein the longer leg, which then forms the actuating part, by an operator to transfer the release / lock lever actuated and the short legs of the toggle lever with the first coupling member directly or indirectly connected.

Around a rasp body connected to the rasp handle in the desired Introduce way into a bone cavity, in particular to beat, too can, it is convenient if at a proximal end of the rasp handle a striking face pointing in the proximal direction is trained.

Preferably has the first contact surface in a distal or substantially in the distal direction and surrounds the coupling receptacle annular. This allows the rasp handle to rest securely on the rasp body, before and while connecting to it.

The object stated at the outset is described in the case of a surgical rasp Art according to the invention achieved in that the hitch be recording has a non-circular curved pressure surface or at least two converging pressure surfaces against which the coupling projection is pressed by means of the first coupling member in the connecting position

A such a surgical rasp makes it possible in particular with minimally invasive and / or under navigation control to be used in surgical procedures. It also allows the coupling projection of the rasp body in defined Way and play with the coupling receptacle into engagement. The first coupling member thus forms a pressing member, which due to the special shape of the coupling receptacle the coupling projection into a defined and always the same position can force, if the rasp handle occupies the connecting position. In the connection position the first coupling member pushes the coupling projection in always exactly the same way against the non-round curved Pressure surface or against the at least two converging Pressure surfaces. So can through the play-free connection the rasp handle and the rasp body the rasp too be navigated because of the position and / or orientation a arranged on the rasping handle referencing unit of a surgical Navigation system, the position and / or orientation of the rasp body can be determined with the same accuracy. Consequently is the further developed according to the invention Rasp handle for performing high-precision surgical Interventions.

conveniently, is the rasp handle of the rasp in the form of one of the above Rasp handles formed. He will then also the already in connection with the preferred embodiments described above explained advantages in an analogous manner.

advantageously, has the second bearing surface in the proximal or substantially in the proximal direction and surrounds the second coupling element annular. So can an optimal support of the rasp handle on Raspelkör by be achieved. In an analogous manner, the first contact surface the two coupling members are surrounded annularly.

Especially it is favorable if the rasp in the form of a Hüftprothesenraspel is trained. So you can easily cavities with her be prepared in a femur for receiving a hip joint endoprosthesis shaft.

advantageously, are two or more releasably connectable to the rasp handle, differently shaped rasp body provided to form a surgical rasp set. Such a surgical rasp set So comes with only a single rasp handle. As required, especially considering a present Physiology of the patient, then can be the optimally suitable rasp body to be selected. All rasp bodies can be connected with the one rasp handle, so that the total for one surgery required instruments in numbers can be minimized. This also reduces in particular the cost of a surgical procedure, since only a minimal number cleaned and sterilized on instruments after surgery must become.

The following description of preferred embodiments The invention is in connection with the drawing of the closer Explanation. Show it:

1 a partially broken side view of a surgical rasp when working on a bone cavity;

2 a partially cutaway perspective view of a locking device of the rasp handle 1 ;

3 FIG. 2 is a partially cut-away perspective view of a distal end of the rasp handle. FIG 1 before connecting to a rasp body;

4 : a side view of the in 3 represented part of the surgical rasp;

5 an enlarged view of area A in FIG 4 ;

6 : a view similar 4 the rasp off 1 in the connection position;

7 a sectional view taken along line 7-7 in 6 ;

8th a sectional view taken along line 8-8 in FIG 6 ;

9 : a view similar 6 a second embodiment of a surgical rasp;

10 : an enlarged view of a distal end portion of the rasp 9 ; and

11 : a view similar 10 , wherein the rasp handle is shown in the release position.

In the 1 to 8th is an overall reference numeral 10 provided surgical rasp. It includes a rasp handle 12 and one with the rasp handle 12 releasably connectable rasp 14 ,

The rasp body 14 includes a shaft 16 , which with a variety of rasping teeth 18 is provided to the medullary canal 20 of a femur 22 prepare a patient for the implantation of a not shown in the figures shaft of a hip joint endoprosthesis. The rasp body 14 is preferably also used for a trial reduction and therefore has an outer contour which is very similar to or substantially identical to that of the prosthesis stem actually to be implanted. The rasping teeth 18 can vary depending on the shape of the shaft 16 on all or part of the outer surface of the shaft 16 be arranged or formed.

The rasp 10 can also have several differently shaped rasp bodies 14 so as to form a surgical rasp set. This means that the rasp handle 12 with the different rasp bodies 14 optionally connectable. Different rasp bodies are preferably provided to select the optimal matching prosthesis stem and the corresponding rasp body depending on the physiology of the patient 14 for the preparation of the medullary cavity 20 which is a cavity in the femur 22 to be able to prepare.

A proximal end of the rasp body 14 is defined by a pointing in the proximal direction and within the meaning of the claims as a second contact surface 24 designated end face. The rasp body 14 is preferably chosen so that the second bearing surface 24 in a certain level, the so-called resection level 26 , lies. This is the plane defined by the saw cut to resect the femoral head. It thus remains on the femur 22 a pointing in the proximal direction, the medullary cavity 20 surrounding endface 28 , The rasp body 14 is preferably chosen so that the second bearing surface 24 in the resection level 26 or slightly distal from it when the stem 16 for a trial reduction in the medullary cavity 20 is introduced.

For connecting the rasp handle 12 with the rasp body 14 serves a total with the reference numeral 30 provided clutch mechanism. This comprises a first coupling element described in more detail below 32 the rasp handle 12 and a second coupling element 34 of the rasp body 14 , The second coupling element 34 is formed by a longitudinal axis 36 defining coupling projection in the form of a pin 38 , which in the proximal direction facing away from the second bearing surface 24 protrudes, which the pin 38 surrounds annularly. The cross section of the pin 38 is in 8th shown and has a cylindrical basic shape, which by two flat side surfaces 40 which is an angle between them 42 of about 85 °, is flattened and thus has a total deviating from a circular cross-sectional shape. The side surfaces 40 define planes that are parallel to the longitudinal axis 36 run and medialseitig in one to the longitudinal axis 36 cut parallel lines. One is between the side surfaces 40 extending side surface 44 forms part of a cylinder surface which is co-centric to the longitudinal axis 36 runs. A pointing in the proximal direction and the longitudinal axis 36 vertical end surface 46 of the pin 38 is parallel to the second contact surface 24 educated.

Due to the special cross-sectional shape of the pin 38 becomes in connection with the first coupling element 32 an anti-twist device 48 formed, by forming a positive and / or positive connection between the first and second coupling element 32 . 34 in the connecting position, in which the rasp handle 12 with the rasp body 14 connected is. Thus, in the connection position, a rotation of the rasp handle 12 and the rasp body 14 relative to each other about the longitudinal axis 36 be prevented.

The first coupling element 32 is in the form of a coupling hole forming a blind hole 50 at a distal end of the rasp handle 12 formed and has a pin 38 essentially corresponding shape, so that the pin 38 in the blind hole 50 only parallel or substantially parallel to the longitudinal axis 36 can be introduced. In particular, the blind hole 50 two converging side surfaces 51 on which parallel to the side surfaces 40 of the pin 38 are formed and so also the angle 42 between them. By mutually corresponding configuration of the first and second coupling elements 32 and 34 is the twisting by training the rotation 48 the rasp handle 12 and the rasp body 14 relative to each other easily and safely prevented. Furthermore, it is due to the special and mutually corresponding wedge shape of the pin 38 and the blind hole 50 possible, the first and second coupling elements 32 and 34 engage in a defined manner with each other, as will be explained in more detail below.

Lateral side is on the pin 38 an approximately wedge-shaped recess 52 provided, which is open facing in the lateral direction and from the longitudinal axis 36 points away. The recess forms a recess in the side surface 44 and is in the direction of the longitudinal axis 36 Rounded down.

The rasp handle 12 comprises an elongated, rectangular in cross-section or in the We substantial rectangular shaft 54 which has a distal shaft portion 56 and a proximal shaft portion 58 includes. longitudinal axes 60 and 62 of the distal shaft portion 56 or the proximal shaft portion 58 are against each other at an angle 64 inclined by about 25 °. The length of the distal section 56 corresponds to about one third of the total length of the shaft 54 ,

The first coupling element 32 further comprises a first, on the shaft 54 movably mounted coupling member 66 , The first coupling member 66 is one transverse to the longitudinal axis 60 extending pivot axis 68 inside a recess 70 , which is laterally open, at the distal portion 56 pivoted. The recess 70 is over an opening 72 with the blind hole 50 connected so that a distal end 74 of the first coupling member 66 which at least partially has a medially extending coupling member portion 76 forms, in a release position, the blind hole 50 releases so that the pin 38 in the blind hole 50 can be inserted, and in a connecting position of the rasp handle 12 , such as in 6 represented, in which a coupling receptacle 78 forming blind hole 50 at least partially immersed or protruding. The coupling member section 76 further forms a coupling member projection 80 , which in the connecting position when the pin 38 in the blind hole 50 is inserted into the recess 52 intervenes. Adjacent side surfaces of the recess 52 and the coupling member portion 76 are designed so that the blind hole 50 annular surrounding, in the sense of the claims first end surface 82 in the connecting position against the second end surface 24 ge is pressed. The first endface 82 defines a plane which is perpendicular to the longitudinal axis 60 runs.

The first coupling member 66 is substantially cuboid-shaped and has a narrow, elongated rectangular and in the medial direction facing rear side surface 84 on. The medial, ie opposite direction facing side surface 86 of the first coupling member 66 is formed contoured. On the distal side, it starts with the coupling element projection 80 , on which a Kupplungsgliedausnehmung on the proximal side 88 connects, which transverse to the longitudinal axis 60 and is open in the medial direction. It is shaped to be a due to the recess 52 on the proximal side of the pin 38 trained lead 90 in the connection position in the Kupplungsgliedausnehmung 88 can dive.

By the described configuration and pivotal mounting of the first coupling member 66 It is possible to use this as a pressing member to a pressing force on the coupling member projection in the transition from the release position into the connecting position 80 on the cones 38 initiate and the latter then in a defined manner against the converging surfaces 51 to press. Furthermore, by the pivotal movement of the first coupling member 66 and the interaction of the matched in their outer contour coupling member projection 80 and recess 52 the end surface 82 against the end surface 24 drawn. Thus, solely due to the movement of the first coupling member 66 in the connection position abutting surface pairs additionally pressed against each other. The surface pairs are the side surfaces 40 and 51 as well as around the end surfaces 24 and 82 ,

Proximalseitig the Kupplungsgliedausnehmung 88 is the side surface 86 on a short section approximately parallel to the side surface 84 running trained. A prism-like selection advantage 92 is the medial side of the first coupling member 66 pointing in the medial direction and has a rounded edge 94 on, which defines a longitudinal axis, the axis parallel to the pivot 68 runs. Proximal side of the selection projection 92 is the side surface 86 on a short section again parallel to the side surface 84 designed to be in the direction of the proximal end 96 once again directed to be bulging in the medial direction.

The distal shaft section 56 is slightly proximal to the blind hole 50 with a cross hole 98 provided, whose longitudinal axis is aligned with the longitudinal axis 60 vertical cuts. The transverse bore 98 connects a medial side surface 100 of the shaft portion 56 with the recess 70 , In the cross hole 98 is a ball pressure piece 102 used, which is a cup-shaped sleeve 104 includes which medial side with a bottom 106 is closed. Furthermore, the ball pressure piece comprises 102 a ball 108 which is in the sleeve 104 held movable and secured against lateral leakage, but laterally over an edge 110 the laterally open sleeve 104 can protrude. By means of a coil spring 112 , which forms a biasing element, becomes the ball 108 pressed in a lateral direction by the coil spring 112 on the ground on the one hand 106 and then on the ball 108 supported.

The ball pressure piece forms part of a total with the reference numeral 114 provided coupling member position assurance device, which serves in the release position and / or the connection position of the rasp handle 12 on the first coupling member 66 to exert a lower force than in at least one intermediate position during the transfer of the first coupling member 66 from the release position in the connection position and / or vice versa. The ball pressure piece 102 is arranged so that it is in the at least one intermediate position with the ball 108 on the edge 94 rests in such a way that the edge 94 on a connecting line 116 which is a midpoint of the sphere 108 and the pivot axis 68 combines. The selection advantage 92 forms a selection element 118 for assisting a movement of the first coupling member 66 from the intermediate position described in the release position, as for example in 4 is shown, or in the connection position, such as in 6 is shown.

To facilitate the transition from the intermediate position to the release position or in the connection position, the selection member has 118 a first, substantially in the proximal direction facing sliding surface 120 and a second, substantially in the distal direction facing sliding surface 122 on. The sliding surfaces 120 and 122 form side surfaces of the selection projection 92 on the proximal side or distal side of the edge 94 , The ball pressure piece 102 and the pivotally mounted first coupling member 66 are arranged such that the first securing member of the coupling member position assurance device 114 forming ball 108 when transferring the first coupling member 66 from the at least one intermediate position into the connecting position on the sliding surface 122 slips on while the first coupling member 66 forced moves into the connecting position, in which the coupling member projection 80 at least partially in the blind hole 50 dips. Furthermore, the first securing member, so the ball slides 108 , when transferring the first coupling member 66 from the at least one intermediate position into the release position on the sliding surface 120 while moving the first coupling member 66 forced into the release position, in which the coupling member projection 80 the blind hole 50 releases. Due to the design and arrangement of the ball print piece 102 it is ensured that the first coupling member 66 the ball 108 from a basic position in which the ball 108 over the edge 110 projects in the lateral direction, against the force of the coil spring 112 can bring into a deflected position.

As already described, lies in the maximum deflected position of the ball 108 the edge 94 like that on the ball 108 at that a center of the sphere 108 , the edge 94 and the pivot axis 68 on the connecting line 116 lie. This intermediate position defines a dead center position, in which there is a small, but on the first coupling member 66 requires specifically acting force to the first coupling member 66 to pivot so that the selection member 118 on a distal or proximal side of the connecting line 116 is moved, leaving the ball 108 at the first or second sliding surface 120 respectively 122 slide up and the first coupling member 66 can move into the release or connection position. Conversely, to transfer the first coupling member 66 from the release position into the connection position or vice versa by means of the selection projection 92 the ball 108 against the action of the coil spring 112 to be moved. It must therefore, as described, the dead center position of the first coupling member 66 be overcome. Due to the special design of the coupling member position assurance device 114 thus becomes the first coupling member 66 automatically held securely in the release position or in the connection position.

In the transition region between the proximal shaft portion 58 and the distal shaft portion 56 is a release / lock lever 124 around one transverse to the longitudinal axes 60 and 62 extending pivot axis 126 pivoted. The release / lock lever 124 is designed in the form of a toggle lever, which has a short lever arm 128 and a long lever arm 130 defined, which are substantially transverse to each other and to the pivot axis 126 are oriented. The long lever arm 130 of the release / lock lever 124 has a length which is approximately half the length of the proximal shaft portion 58 equivalent. At the short lever arm 128 is a slot 132 provided, through which a in a proximal end region 134 an elongated, part of a power transmission mechanism 135 for transmitting an actuating force from the release / lock lever 124 on the first coupling member 66 forming pivot lever 136 arranged bearing pin 138 extends. The bearing pin 138 is in the slot 132 forcibly guided, so that the pivot lever 136 relative to the release / lock lever 124 can perform a superimposed rotational / translational movement. The bearing pin 138 thus forms in conjunction with the slot 132 a third guide device 139 in the sense of the claims.

The short lever arm 128 is chosen overall so that it is independent of a position of the release / locking lever 124 not over outer surfaces of the shaft 54 protrudes. A distal end region 140 of the swivel lever 136 is by means of another bearing pin 142 which is parallel to the pivot axis 68 extending pivot axis 144 defined, rotatably with the first coupling member 66 in the area of getting to the end 96 subsequent medial bulging of the side surface 86 connected. The first coupling member 66 is to accommodate the end area 140 with a groove opened in the proximal direction 146 Mistake. In the same way is on the short lever arm 128 a groove that opens substantially in the distal direction 148 formed, in which the Endbe rich 134 intervenes and is conducted on both sides.

By the connection of the release / locking lever 124 and the first coupling member 66 by means of the pivoting lever 136 may be due to a pivoting of the release / locking lever 124 around the pivot axis 126 such that the long lever arm 130 from the shaft 54 is pivoted away, the pivot lever 136 be moved in the distal direction, so that the first coupling member is pivoted to the release position, in which the coupling member projection 80 the blind hole 50 releases.

An outer surface of the release / lock lever 124 is with a plurality of mutually parallel and transverse to the longitudinal axis 62 oriented flat transverse grooves 150 Mistake. Further, at the proximal shaft portion 58 a shallow depression 152 formed, in which the release / locking lever 124 is substantially completely immersed in the locking position, so that with the transverse grooves 150 provided side surface of the release / locking lever 124 a part of an outer surface of the shaft 54 Are defined.

The rasp handle 12 also has a locking device 154 on to lock the rasp handle 12 in the connection position. This is achieved in that the locking device 154 is formed for locking the release / locking lever 124 at the grater handle 12 in the connection position.

A part of the locking device 154 forms a transverse projection 156 , which is one of the shaft 54 facing inner surface 158 of the release / lock lever 124 in the area of its proximal end 160 protrudes vertically and has a free end 162 having. At the cross projection 156 is an opening 164 formed, which defines a longitudinal axis which is parallel to one of the long lever arm 130 defined longitudinal axis is oriented. Is the release / lock lever 124 to the shaft 54 swung up and dives into the depression 152 a, extends the longitudinal axis of the opening 164 parallel to the longitudinal axis 62 , So the release / lock lever 124 at all in the depression 152 can dip is on the shaft 54 one transverse to the longitudinal axis 62 running aperture 166 provided, which is dimensioned so that the transverse projection 156 can swing into it.

In the from the depression 152 pointing away side surface 168 of the proximal shaft portion 58 is another recess 170 formed, in which a second securing member 172 parallel to the longitudinal axis 62 is held displaceable. The second securing member 172 each includes a cylinder section on the proximal and distal sides 174 that have the same diameter. They become distal and proximal of the opening 166 in the recess 170 guided, which is the distal side of the opening 166 through two pins 176 , on the proximal side of the opening 166 through three pins 176 is secured, whose longitudinal axes transverse to the longitudinal axis 62 are oriented. Through the pins 176 is the second securing member 172 longitudinally displaceable, that is parallel to the longitudinal axis 62 in the recess 170 held.

To the proximal-side cylinder section 174 closes in from the recess 170 over the side surface 168 protruding actuator 178 in the form of a flat cuboid projection. Between the actuator 178 and the distal-side cylinder portion 174 extends another cylinder section 180 whose diameter is about half the diameter of the cylinder sections 174 , The diameter of the cylinder section 180 is slightly smaller than a minimum width of an insertion slot 182 of the cross projection 156 , The insertion slot 182 opens the opening 164 laterally so that the cylinder section 180 whose diameter is also smaller than the diameter of the opening 164 , through the insertion slot 182 in the opening 164 can be introduced.

The second securing member 172 further comprises a securing projection 184 , which is directly distal to the actuator 178 connects and the cylinder section 180 partially surrounds. The security advantage 184 has one for breakthrough 164 corresponding diameter, so that it form-fitting in the opening 164 can dive. The security advantage 184 also has a sliding surface 186 on which the cylinder section 180 annularly surrounding and with respect to the longitudinal axis of the cylinder portion 180 inclined by about 45 ° so that it is distally as well as towards the transverse projection 156 points. The end 162 of the cross projection 156 is also bevelled and defined on both sides of the insertion slot 182 two additional sliding surfaces 188 that with the sliding surface 186 interact when the cross projection 156 in the opening 166 is introduced and with the second securing member 172 comes into contact. As a result of slipping on the sliding surfaces 186 and 188 together, the second securing member 172 forced in the proximal direction moves. At a proximal end surface 190 the proximal-side cylinder portion 174 supports a coil spring 192 whose other end is at a distally facing inner side surface 194 the recess 170 is applied. The coil spring 192 forms a return device and serves to the second securing member 172 resiliently biased to hold in a normal position. In the basic position is an end face pointing in the distal direction 196 of distal-side cylinder section 174 on one to the side surface 194 parallel side surface 198 which points in the proximal direction.

In 1 is the rasp handle 12 shown in the locked position. The security advantage 184 engages in the opening 164 one. Will the actuator 178 in the direction of the arrow 200 shifted in the proximal direction, gives the safety projection 184 the opening 164 free. The displacement of the second securing member 172 in the proximal direction is only against the action of the coil spring 192 possible. Also as a result of slipping on the sliding surfaces 186 and 188 becomes the coil spring 192 compressed. Will the actuator 178 let go, pushes the coil spring 192 the second securing member 172 automatically return to the basic position.

In the release position, the in 2 is shown, the release / lock lever 124 in the direction of the arrow 202 from the shaft 54 away from the pivot axis 126 be pivoted outwards. This has the consequence that, as already described above, the pivot lever 136 is moved in the distal direction. However, this is also the first coupling member 66 around the pivot axis 68 pivoted, in such a way that the coupling member projection 80 out of the blind hole 50 is moved out.

For connecting the rasp handle 12 with the rasp body 14 becomes the rasp handle 12 initially transferred to the release position. Then the pin can 38 in the blind hole 50 be introduced until the contact surfaces 82 and 84 lie flat against each other. By pivoting the release / locking lever 124 into the depression 152 into, becomes the first coupling member 66 around the pivot axis 68 pivoted so that the coupling member projection 80 into the recess 52 is pivoted into the coupling elements 32 and 34 interlock positively and positively and so the rasp handle 12 with the rasp body 14 connect. The connection position is secured on the one hand by the locking device 154 , which the release / lock lever 124 holds in the connecting position and at the same time in the locking position, and on the other by the coupling member position assurance device 114 which directly on the first coupling member 66 acts and keeps this in the connection position.

To the rasp body 14 in the desired way in the medullary canal 20 is to strike, is at a proximal end of the proximal shaft portion 58 a striker 204 arranged, which in the proximal direction facing, slightly convex curved face 206 having. With a hammer can be so simple and safe power strokes by hitting the hammer on the clubface 206 on the rasp 10 be transferred to the medullary cavity 20 to prepare as desired a cavity for the implantation of a prosthetic shaft.

Is the medullary cavity 20 so prepared that the rasp body 14 assumes the desired position of the prosthetic stem to be implanted, the rasp handle 12 again in a simple way from the grater body 14 be solved, by transferring the rasp handle 12 from the connecting position to the release position, wherein first the locking device 154 should be transferred from the locking position to the release position. Optionally, the rasp body 14 be connected to a Probegelenkeenkopf, especially in a modular prosthesis system, the optimal matching prosthesis parts, for example, by trying to select.

The cylindrical side surface 44 of the pin 38 can serve as a guide for a so-called "Kalkar cutter", with which the Calcar Femuralis up to the resection level 26 can be milled. Due to the short and narrow design of the pin 38 and due to the deep seat directly on the resection surface, this connection is ideally suited for minimally invasive approaches and for a so-called "stem-first" surgical technique in which the stem of a hip joint endoprosthesis is first implanted. Due to the special design of the coupling mechanism 30 can provide a clear and play-free connection between the rasp handle 12 and the rasp body 14 be prepared, so that in particular in navigated surgical interventions in which the rasp handle 12 is navigated, for example by a reference element is arranged on it, which is detectable by a navigation system, a precise handling and tracking a movement of the rasp 10 is ensured in the room. Through the coupling mechanism 30 become the contact surfaces 24 and 82 compressed to each other in a defined manner, which also to stabilize the connection and axial positioning of the rasp 10 serves. As stated, the rasp handle is 12 suitable to be placed on different families of prostheses, that is on to unterschiedli chen prosthesis families belonging Raspelkörper 14 , The option, the rasp 10 Using "Stem-First" surgical techniques provides the surgeon with more corrective options for implantation than traditional surgical procedures, so he can better respond to complications.

A slightly modified embodiment of the rasp 10 is in the 9 to 11 shown in detail. The alternative embodiment has all of the above-described advantages in common hang with the 1 to 8th described rasp 10 on. However, it is different from the one in the 1 to 8th illustrated and described variant by the design of the coupling of the release / locking lever 124 with the first coupling member 66 , For the sake of clarity, therefore, are below in connection with the description of 9 and 11 for identical or in their function very similar parts, which also in the in the 1 to 8th illustrated rasp 10 are provided, identical reference numerals used.

The release / lock lever 124 in the in the 9 to 11 illustrated embodiment is with a pivot lever 136 ' by means of a pen 208 one from the pen 208 defined pivot axis 210 pivoted. A proximal end region 134 of the pivot lever 136 ' engages in the release / locking lever 124 provided groove 148 one. The swivel lever 136 ' is about half as long as the pivot lever 136 , He is with his distal end 140 in a pointing in the proximal direction and on a push and pull member 212 trained groove 214 fitted and there on a pen 216 around a pivot axis defined by its longitudinal axis 218 pivoted. The pivot axes 210 and 218 run parallel to the pivot axis 126 , The push and pull link 212 carries slightly distally on a middle portion thereof another pin 220 , which on both sides, as well as the pen 216 , about the push and pull link 212 protrudes and into the recess 70 bounding sidewalls 224 of the shaft 54 introduced slots 222 engages whose width is a diameter of the pins 216 respectively 220 equivalent. The long holes 222 define with their longitudinal axes 226 a displacement direction, which with respect to the longitudinal axis 36 is inclined by a few degrees. The extension of the oblong holes 222 in the direction of the longitudinal axis 226 is slightly larger than a distance of the pins 216 and 220 so that the push and pull member 212 parallel to the longitudinal axis 262 can be moved in the proximal or distal direction. The pencils 216 and 220 form in connection with the oblong holes 222 a first guide device 223 in the sense of the claims.

In a distal end area 228 the push and pull link 212 is a curved slot 230 formed, in which the on the first coupling member 66 the groove 146 enforcing pen 142 is performed. The pencil 142 gets through the slot 230 forcibly guided in the proximal or distal direction as a result of a movement of the push and pull member. The slot 230 and the pen 142 form a second guide device 231 within the meaning of the claims, in the form of a so-called "slot cam guide" 232 , similar to the pen 138 in connection with the slot 132 ,

The release / lock lever 124 is so in the in the 9 to 11 illustrated embodiment of the rasp 10 over two elements with the first coupling member 66 connected, namely on the pivoting lever on the release / locking lever pivotally mounted 136 ' and about the pivot lever 136 ' with the first coupling member 66 connecting push and pull link 212 , The release / lock lever 124 , the pivot lever 136 ' as well as the push and pull link 212 form a power transmission mechanism 135 ' which one of the deflection and the transmission of one over the release / lock lever 124 initiated locking force on the with the rasp handle 12 connected grating body 14 serves. The push and pull link 212 has the additional function of opening the first coupling element 32 as a releasing the blind hole 50 , by a corresponding counterforce, for example, a counter-moment, on the Raspelkörper 14 , to prevent. This is achieved by a mechanical, positive stop between the push and pull member 212 and the distal shaft portion 56 realized.

As already stated, the functioning of the in the 9 to 11 shown and described above rasp 10 not of that in the 1 to 8th illustrated embodiment with regard to the coupling of the rasp handle 12 with the rasp body 14 , Only and only the design of the power transmission mechanism 135 ' for transmitting an actuating force from the release / lock lever 124 on the first coupling member 66 is in the in the 9 to 11 illustrated embodiment of the rasp 10 unlike the power transmission mechanism 135 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - US 6663636 B1 [0004, 0014]

Claims (64)

Surgical rasping handle ( 12 ) for detachable connection to a rasp body ( 14 ) by means of a coupling mechanism ( 30 ) for forming a surgical rasp ( 10 ), whereby the rasp handle ( 12 ) a first contact surface ( 82 ), which in a connecting position, in which the rasp body ( 14 ) and the rasp handle ( 12 ) are connected to each other at a second contact surface ( 24 ) of the rasp body ( 14 ) is applied, wherein the rasp handle ( 12 ) a first coupling element ( 32 ) is formed or arranged, which forms part of the coupling mechanism ( 30 ) and in the connecting position with a second, on the rasp body ( 14 ) formed or arranged coupling element ( 34 ) is non-positively and / or positively or substantially non-positively and / or positively engageable engageable, wherein the first coupling element ( 32 ) a coupling receptacle ( 50 ) for one on the rasp body ( 14 ) projecting coupling projection ( 38 ) and one on the rasp handle ( 12 ) movably mounted first coupling member ( 66 ) is provided, which at least one coupling member section ( 76 ), which in the connecting position at least partially in the coupling receptacle ( 50 ) and in a release position, in which the rasp handle ( 12 ) from the rasp body ( 14 ) is detachable, with the coupling receptacle ( 50 ) is disengaged, characterized in that the coupling receptacle ( 50 ) a non-circular curved pressure surface or at least two converging pressure surfaces ( 51 ), against which the coupling projection ( 38 ) by means of the first coupling member ( 66 ) is pressed in the connection position. Surgical rasp handle according to claim 1, characterized in that two converging pressure surfaces (14) are provided, which are inclined relative to each other and between them a wedge angle (FIG. 42 ) define. A surgical rasp handle according to claim 1 or 2, characterized in that the at least one coupling member portion ( 76 ) is movable in the transition from the release position into the connecting position in the direction of the curved pressure surface or the at least two relatively inclined pressure surfaces (). Surgical rasp handle according to one of the preceding claims, characterized in that the at least one coupling member section ( 76 ) at the transition from the release position into the connecting position in a direction transversely or substantially transversely to one of the coupling receptacle ( 50 ) defined longitudinal axis ( 60 ) is movable. Surgical rasp handle according to one of the preceding claims, characterized in that the coupling receptacle ( 50 ) has a different cross-section from a circular shape. Surgical rasp handle according to one of the preceding claims, characterized in that the coupling mechanism ( 30 ) an anti-twist device ( 48 ) includes for preventing a rotation of the rasp handle ( 12 ) and the rasp body ( 14 ) about the first longitudinal axis ( 60 ) in the connection position. Surgical rasp handle according to claim 6, characterized in that the anti-rotation device ( 48 ) in the form of a positive connection between the first and second coupling element ( 32 . 34 ) is trained. Surgical rasp handle according to one of the preceding claims, characterized by a coupling member position assurance device ( 114 ), which in the release position and / or the connection position on the first coupling member ( 66 ) exerts a smaller force than in at least one intermediate position during the transfer of the first coupling member ( 66 ) from the release position to the connection position and / or vice versa. A surgical rasp handle according to claim 8, characterized in that the coupling member position assurance device ( 114 ) at least one first securing member ( 108 ), which by the first coupling member ( 66 ) can be brought from a basic position against the force of a biasing element in a deflected position. Surgical rasping handle according to claim 9, characterized in that the biasing element ( 112 ) in the form of a spring element ( 112 ) is trained. Surgical rasping handle according to claim 9 or 10, characterized in that the first securing member ( 108 ) and the biasing element ( 112 ) Part of a ball pressure piece ( 102 ) are. Surgical rasping handle according to one of claims 9 to 11, characterized in that the biasing element ( 112 ) is arranged such that a force exerted by him transversely or substantially transversely to one of the coupling receptacle ( 50 ) defined longitudinal axis ( 60 ). Surgical rasp handle according to one of claims 8 to 12, characterized in that the coupling member position assurance device ( 114 ) on the first coupling member ( 66 ) arranged selection element ( 118 ) for assisting a movement of the first coupling member ( 66 ) from the intermediate position to the release position or the verbin includes. Surgical rasping handle according to claim 13, characterized in that the selection member ( 118 ) in the form of a selection advantage ( 92 ) is trained. Surgical rasping handle according to claim 13 or 14, characterized in that the selection member ( 118 ) at least a first sliding surface ( 122 ), on which the first securing member ( 108 ) when transferring the first coupling member ( 66 ) slides from the at least one intermediate position into the connecting position and thereby the first coupling member ( 66 ) moved in the connection position. Surgical rasping handle according to claim 15, characterized in that the first sliding surface ( 122 ) a substantially distally facing side surface of the selection projection ( 92 ). Surgical rasping handle according to one of claims 13 to 16, characterized in that the selection member ( 118 ) at least one second sliding surface ( 120 ), on which the first securing member ( 108 ) when transferring the first coupling member ( 66 ) slides from the at least one intermediate position into the release position and thereby the first coupling member ( 66 ) is moved to the release position. A surgical rasp handle according to claim 17, characterized in that the second sliding surface ( 120 ) a substantially in the proximal direction facing side surface of the selection projection ( 92 ). Surgical rasp handle according to one of claims 14 to 18, characterized in that the selection projection ( 92 ) one in a direction transverse to one of the coupling receptacle ( 50 ) defined longitudinal axis ( 60 ) and in the direction of the first securing member ( 108 ) pointing tip or edge ( 94 ) having. Surgical rasp handle according to claim 19, characterized in that the tip or edge ( 94 ) is rounded. Surgical rasp handle according to one of claims 8 to 20, characterized in that the coupling member position assurance device ( 114 ) on the proximal side and in the vicinity of the coupling receptacle ( 50 ) is arranged. Surgical rasp handle according to one of the preceding claims, characterized in that the first coupling member ( 66 ) about a first pivot axis ( 68 ) is pivotally mounted. Surgical rasping handle according to claim 22, characterized in that in the release position the selection member ( 118 ) distally or substantially distally of a first securing member ( 108 ) and the first pivot axis ( 68 ) connecting line ( 116 ) is positioned. Surgical rasp handle according to claim 22 or 23, characterized in that in an intermediate position the selection member ( 118 ) on or substantially on a first securing member ( 108 ) and the first pivot axis ( 68 ) connecting line ( 116 ) is positioned. Surgical rasping handle according to one of claims 22 to 24, characterized in that in the connecting position the selection member ( 118 ) proximal or substantially proximal side of a first securing member ( 108 ) and the first pivot axis ( 68 ) connecting line ( 116 ) is positioned. Surgical rasp handle according to one of the preceding claims, characterized in that the first coupling member ( 66 ) a coupling member recess ( 88 ) into which a corresponding projection ( 90 ) on the second coupling element ( 34 ) can engage in the connection position. Surgical rasp handle according to one of the preceding claims, characterized in that the first coupling member ( 66 ) a coupling member projection ( 80 ), which in a corresponding recess ( 52 ) on the second coupling element ( 34 ) can engage in the connection position. Surgical rasping handle according to claim 19 or 20, characterized in that the coupling member recess ( 88 ) and the coupling member projection ( 80 ) distally of the first pivot axis ( 68 ) are positioned. Surgical rasping handle according to one of claims 19 to 21, characterized in that the coupling member recess ( 88 ) and the coupling member projection ( 80 ) in a direction transverse or substantially transverse to the first longitudinal axis ( 60 ) point. Surgical rasp handle according to one of the preceding claims, characterized in that one of the coupling receptacle ( 50 ) defined first longitudinal axis ( 60 ) perpendicular or substantially perpendicular to the first contact surface ( 82 ) runs. Surgical rasp handle according to one of the preceding claims, characterized in that the first and the second contact surface ( 82 . 24 ) are just. Surgical rasp handle according to one of the preceding claims, characterized in that the first and the second contact surface ( 82 . 24 ) Define planes which are transverse or substantially transverse to longitudinal axes ( 60 . 36 ) of the rasp handle ( 12 ) and / or the rasp body ( 14 ). Surgical rasping handle according to one of the preceding claims, characterized by a part of the coupling mechanism ( 30 ) forming release / locking levers ( 124 ), which is pivotably mounted and directly or indirectly connected to the first coupling member ( 66 ) is coupled. Surgical rasp handle according to one of the preceding claims, characterized in that the first coupling member ( 66 ) with the release / locking lever ( 124 ) via a power transmission mechanism ( 135 ; 135 ' ) is movably coupled. A surgical rasp handle according to claim 34, characterized in that the power transmission mechanism ( 135 ; 135 ' ) a pivot lever ( 136 ; 136 ' ), which on the release / locking lever ( 124 ) is pivotally and / or slidably coupled. A surgical rasp handle according to claim 34 or 35, characterized in that the pivot lever ( 136 ; 136 ' ) with the first coupling member ( 66 ) is pivotally coupled. A surgical rasp handle according to claim 34 or 35, characterized in that the pivot lever ( 136 ' ) with one with the release / lock lever ( 124 ) or the first coupling member ( 66 ) movably connected push and pull member ( 212 ) is pivotally and / or slidably coupled. A surgical rasp handle according to claim 37, characterized by a first guiding device ( 223 ) for guiding a movement of the push and pull member ( 212 ) at the transition from the connection position to the release position and vice versa. A surgical rasp handle according to claim 38, characterized in that the first guide device ( 223 ) a first direction of movement parallel or substantially parallel to one of the coupling receptacle ( 50 ) defined longitudinal axis ( 36 ) Are defined. Surgical rasping handle according to one of claims 37 to 39, characterized by a second guiding device ( 231 ) for guiding a movement of the push and pull member ( 212 ) relative to the first coupling member ( 66 ) at the transition from the connection position to the release position and vice versa. Surgical rasping handle according to one of Claims 37 to 39, characterized by a third guiding device ( 139 ) for guiding a movement of the release / locking lever ( 124 ) relative to the pivot lever ( 136 ) from the connection position to the release position and vice versa. A surgical rasp handle according to any one of claims 38 to 41, characterized in that the first, second and / or third guide means ( 223 ; 231 ; 139 ) each by a slot-cam guide ( 232 ) is formed. Surgical rasping handle according to one of the preceding claims, characterized by a locking device ( 154 ) for locking the rasp handle ( 12 ) in the connection position. A surgical rasp handle according to claim 43, characterized in that the locking device ( 154 ) is formed for locking the release / locking lever ( 124 ) on the grater handle ( 12 ) in the connection position. Surgical rasping handle according to claim 43 or 44, characterized in that the locking device ( 154 ) at least one second securing member ( 172 ), which in the release position with the release / locking lever ( 124 ) and in a locking position with the release / lock lever ( 124 ) is engaged. Surgical rasp handle according to one of claims 43 to 45, characterized in that the locking device ( 154 ) Can be brought in the connecting position in the locking position. A surgical rasp handle according to claim 45 or 46, characterized in that the release / locking lever ( 124 ) and the at least one second securing member ( 172 ) in the locking position non-positively and / or positively engage. Surgical rasping handle according to one of claims 45 to 47, characterized in that the at least one second securing member ( 172 ) displaceable on the rasp handle ( 12 ) is stored. A surgical rasp handle according to any one of claims 45 to 48, characterized in that the at least one second securing member ( 172 ) parallel or substantially parallel to one of Rasp handle ( 12 ) defined longitudinal axis ( 62 ) is movable. Surgical rasping handle according to one of claims 45 to 49, characterized in that the at least one second securing member ( 172 ) assumes the locking position in a basic position. A surgical rasp handle according to claim 50, characterized in that the at least one second securing element ( 172 ) is held compulsorily in the basic position. A surgical rasp handle according to claim 50 or 51, characterized in that the at least one second securing member ( 172 ) is held resiliently biased in the basic position. A surgical rasp handle according to any one of claims 50 to 52, characterized in that the at least one second securing member ( 172 ) by a reset device ( 192 ) is held in the basic position. A surgical rasp handle according to any one of claims 50 to 53, characterized in that the at least one second securing member ( 172 ) a first securing projection ( 184 ) or a first securing recess, which in the locking position with a corresponding second securing recess ( 164 ) or a corresponding second securing projection of the release / locking lever ( 124 ) is engaged. A surgical rasp handle according to any one of claims 50 to 54, characterized in that the at least one second securing member ( 172 ) at least one operating section ( 178 ), which over an outer contour of the rasp handle ( 12 ) protrudes. Surgical rasping handle according to one of claims 33 to 55, characterized in that the release / locking lever ( 124 ) in the locking position a part of an outer contour of the rasp handle ( 12 ). Surgical rasping handle according to one of claims 33 to 56, characterized in that the release / locking lever ( 124 ) in the form of or substantially in the form of a toggle lever, with which an introduced into an operating part locking force for transmission to the first coupling member ( 66 ) is amplifiable. Surgical rasp handle according to one of the preceding claims, characterized in that at a proximal end of the rasp handle ( 12 ) a striking surface facing in the proximal direction ( 206 ) is trained. Surgical rasping handle according to one of the preceding claims, characterized in that the first bearing surface ( 82 ) in a distal or substantially distal direction and the coupling receptacle ( 50 ) surrounds annularly. Surgical rasp ( 10 ) with a rasp body ( 14 ), a rasp handle ( 12 ) and a clutch mechanism ( 30 ) for releasably connecting the rasp body ( 14 ) and the rasp handle ( 12 ), whereby the rasp handle ( 12 ) a first and the rasp bodies ( 14 ) a second contact surface ( 82 . 24 ), which in a connecting position, in which the rasp body ( 14 ) and the rasp handle ( 12 ) are in contact with each other, which coupling mechanism ( 30 ) a first, on the rasp handle ( 12 ) arranged or formed coupling element ( 32 ) and a second, on the grater body ( 14 ) formed or arranged coupling element ( 34 ), which in the connecting position non-positively and / or positively or substantially non-positively and / or interlock form-locking, wherein the first coupling element ( 32 ) a coupling receptacle ( 50 ) for one on the rasp body ( 14 ) projecting coupling projection ( 38 ) and one on the rasp handle ( 12 ) movably mounted first coupling member ( 66 ) is provided, which at least one coupling member section ( 76 ), which in the connecting position at least partially in the coupling receptacle ( 50 ) and in a release position, in which the rasp handle ( 12 ) from the rasp body ( 14 ) is detachable, with the coupling receptacle ( 50 ) is disengaged, characterized in that the coupling receptacle ( 50 ) has a non-circular curved pressure surface or at least two converging pressure surfaces, against which the coupling projection ( 38 ) by means of the first coupling member ( 66 ) is pressed in the connection position. Surgical rasp according to claim 56, characterized by a rasp handle ( 12 ) according to one of claims 2 to 59. A surgical rasp according to claim 60 or 61, characterized in that the second abutment surface ( 24 ) in the proximal or substantially proximal direction and the second coupling element ( 34 ) surrounds annularly. Surgical rasp according to one of claims 60 to 62, characterized in that the rasp ( 10 ) in the form of a hip prosthesis rasp ( 10 ) is trained. A surgical rasp according to any one of claims 60 to 63, characterized in that two or more with the rasp handle ( 12 ) detachably connectable, differently shaped rasp bodies ( 14 ) are provided for forming a surgical rasp set.