WO1990001297A1 - Gripping device and method, for example for biopsy - Google Patents

Gripping device and method, for example for biopsy Download PDF

Info

Publication number
WO1990001297A1
WO1990001297A1 PCT/FR1989/000415 FR8900415W WO9001297A1 WO 1990001297 A1 WO1990001297 A1 WO 1990001297A1 FR 8900415 W FR8900415 W FR 8900415W WO 9001297 A1 WO9001297 A1 WO 9001297A1
Authority
WO
WIPO (PCT)
Prior art keywords
jaws
piston
cylinder
fixed
articulation
Prior art date
Application number
PCT/FR1989/000415
Other languages
French (fr)
Inventor
Jean-Louis Crillon
Joël DHERBE
Original Assignee
Crillon Jean Louis
Dherbe Joel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Crillon Jean Louis, Dherbe Joel filed Critical Crillon Jean Louis
Publication of WO1990001297A1 publication Critical patent/WO1990001297A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/06—Biopsy forceps, e.g. with cup-shaped jaws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
    • B25B7/126—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with fluid drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2926—Details of heads or jaws
    • A61B2017/2932—Transmission of forces to jaw members
    • A61B2017/2933—Transmission of forces to jaw members camming or guiding means

Definitions

  • Gripping method and device for example for biopsy.
  • the present invention relates to a gripping device comprising a clamp whose opening and closing are remotely controlled. According to a particularly interesting application, although in no way limiting, this device is called upon to constitute a biopsy forceps.
  • the invention also relates to a gripping method which can advantageously be implemented by means of this device, for example for performing biopsies.
  • Biopsy forceps currently used for taking samples of tissue fragments or the like from living organisms, for example, for microscopic examinations include cutting jaws actuated by a control device comprising a handle remote from said jaws and connected to these by a system of extremely fragile and relatively complex cables and articulated parts, assembled by numerous welds. This material is used by highly qualified personnel who, although warned by experience of the fragility of these instruments, cannot avoid very frequent breakage of the cables which ensure the opening and closing of the jaws of said instruments.
  • these pliers because of their destination and their instructions for use, have very small dimensions and that the cables that control the opening and closing of their jaws are extremely thin.
  • the pressure that must be exerted on the handle to ensure the movement of the jaws must be strong enough to be able to take samples by cutting (and not by tearing and tearing) particles of tissue or mucous membranes.
  • this pressure does not can be measured and controlled with precision, so that it is left to the discretion of the manipulator who does not always evaluate it correctly, which is the cause of cable breakage or loose welds.
  • An objective of the present invention is to remedy these drawbacks.
  • this object is achieved by a method and a device according to which at least one of the jaws of the clamp is fixed, by means of an articulation, to the end of the rod of a piston. Housed, with a sealed sliding ability, in a cylinder in which it delimits a vacuum chamber and whose recoil causing the closure of said jaws is obtained by putting said vacuum chamber in relation to a vacuum or suction source, while the opening of the jaws is ensured by a compression spring which pushes the piston forward when the vacuum chamber does not is no longer under vacuum.
  • the length of the sheath can be practically limited; the device according to the invention thus allows access to or inside mechanisms, without the less length restriction.
  • a wide range of jaws of different confusions can be offered to users, as required.
  • Their dimensions can vary according to the samples to be taken or according to the diameter of the endoscope, in the case of a medical application.
  • Figure 1 is an elevational front view of the gripping device according to the invention.
  • Figure 2 is a longitudinal sectional view of this device considered along a plane perpendicular to the pivot axis of the jaws of the clamp shown in the open and rest position.
  • Figure 3 is a view similar to Figure 2 and showing The clamp in the closed position.
  • FIG. 4 is an elevation view with partial longitudinal section considered along a plane perpendicular to that of FIGS. 2 and 3.
  • Figure 5 is an exploded perspective view of the front end of the clamp.
  • the device according to the invention comprises a cylinder 1 in which is mounted, with a watertight axial sliding ability, a piston 2 advantageously equipped with a peripheral seal * 3: This piston is integral with an axial drive rod 4 Which, for ease of manufacture and assembly, is preferably fixed by screwing to said piston.
  • the piston comprises an axial thread and the end of the drive rod 4 is provided with a threaded axial finger 4a screwed into said thread.
  • This threaded finger has a smaller diameter than that of the rod and, between the surfaces arranged opposite the end of the rod and of the piston, an annular seal 5 is arranged which can be partially housed in a circular groove. formed in the circular crown-shaped surface of said end.
  • the piston 2 thus produced deli ite, inside the cylinder 1 and by its rear face, a chamber 20 which will be called “vacuum chamber” in the rest of this presentation.
  • the spring 6 tends to constantly push the piston 2 forward.
  • the rear part 1a of the cylinder 1 advantageously has a smaller diameter than that of the remaining portion thereof and this rear part is provided with a thread by means of which it is connected to a flexible sheath 8 (of which only shown a terminal part in the drawings) whose length can be variable and which is connected to a control device which can be constituted by a handle of a type known per se comprising a valve which can be operated by means of a pivoting lever or a push button.
  • This control device is equipped with a pipe provided with connections for connecting it to a source of aspi ration 'or vacuum.
  • control and connection devices are not described, which do not, per se, fall within the scope of the invention and which may be constituted by known apparatus.
  • the cylinder 1 can be executed in two parts 1b, 1c, assembled by screwing.
  • the piston 2 slides in the rear part 1b, while the rod 4 is mounted with a sliding ability in the front part 1c.
  • the clamp itself is installed in front of the front part 1c of the cylinder and it consists of two jaws 9.
  • At least one of the two jaws 9 is mobile and fixed, by means of an articulation, to the front end of the rod 4.
  • the two jaws 9 are mobile and are fixed by means of a joint on the front end of said rod.
  • the two jaws 9 are fixed by means of an articulation comprising a common axis 10.
  • the jaws 9 each have a fixing branch 11 the end of which is provided with a hole 12 and said ends are housed in a hinge yoke 13 constituting the front end of the rod 4 and also provided with aligned holes 14.
  • the axis 10 passes through the holes 12 and 14, and it is locked in the latter, by means of its ends opposite.
  • a spreader bar 15 is fixed diametrically to the front part of the cylinder 1. This fixed bar is arranged parallel to the axis 10 articulation of the jaws and it is placed in front of the latter. On the other hand, it is arranged between the fixing branches 11 of the jaws.
  • a notch 16 is provided at the front end of the side wall of the cylinder 1, in the tilting plane of the fixing and articulation branch 11 of the movable jaw or each movable jaw 9, in order to allow passage of said branch, during the pivoting of said movable jaw or jaws towards the outside.
  • the articulation branches 11 have a convex outer edge 11a which forms a guide ramp sliding on the bottom of the notches 16, favoring the pivoting movement of the jaws in the open or closed positions.
  • the jaws 9 can have different conformations adapted to the functions they are called upon to perform.
  • the jaws 9 may comprise, on their internal face, a concavity 17 substantially hemispherical delimited by a cutting edge 18 in its half front part.
  • the jaws close together delimit a substantially spherical cavity large enough to contain a fragment of the tissue, biological sample or other pre-emergent sample.
  • an orifice 19 opening to the outside is formed in the bottom of the concavities 17 of the jaws 9, in order to allow the evacuation of the blood or liquid impregnating the fragment of tissue or other sample taken.
  • the anterior end of the outer surface of the jaws has a rounded conformation, devoid of sharp edges.
  • the forceps and its flexible sheath are housed in an endoscope through which said forceps are brought to the desired sampling location.
  • the vacuum created in said chamber causes the piston 2 to recede against the antagonistic action of the spring 6 which is compressed during this recoil.
  • Said spring being calibrated to a value lower than the suction force exerted by the vacuum source.
  • the displacement of the piston backwards causes the clamp to close, the jaws 9 of which are brought together by the action of the bottom of the notches 16 against which slides the convex external edge 11a of the articulation branches 11 of said jaws.
  • the spring 6 pushes the piston 2 forward.
  • the spreader bar 15 against which the internal edge of the articulation branches 11 of the jaws 9 slides causes the latter to tilt in the open position.

Abstract

Gripping method, for example for biopsy, characterized in that at least one of the jaws (9) of a forceps is fixed by means of a joint to the extremity of the rod (4) of a piston (2) which sealingly slides within a cylinder (1) wherein it defines a vacuum chamber (20), and in that the closure of said jaws (9) is obtained by communicating said vacuum chamber (20) with a vacuum source in order to create a vacuum which causes the piston (2) to move back and consequently bringing together the jaws. The invention also relates to a device for implementing such method.

Description

Procédé et dispositif de préhension, par exemple pour biopsie. Gripping method and device, for example for biopsy.
La présente invention concerne un dispositif de préhension comportant une pince dont l'ouverture et la fermeture sont commandées à distance. Selon une application particulièrement intéressante, bien que nullement limitative, ce dispositif est appelé à constituer une pince à biopsie. L'invention vise également un procédé de préhension qui peut être avantageusement mis en oeuvre au moyen de ce dispositif, par exemple pour effectuer des biopsies.The present invention relates to a gripping device comprising a clamp whose opening and closing are remotely controlled. According to a particularly interesting application, although in no way limiting, this device is called upon to constitute a biopsy forceps. The invention also relates to a gripping method which can advantageously be implemented by means of this device, for example for performing biopsies.
Les pinces à biopsie actuellement utilisées pour effectuer des prélèvements de fragments de tissus ou autres sur des organismes vivants, par exemple, en vue d'examens microscopiques, comportent des mâchoires coupantes actionnées par un dispositif de commande comprenant une poignée éloignée desdites mâchoires et reliée à celles-ci par un système de câbles et de pièces articulées extrêmement fragi les et relativement complexes, assemblés par de nombreuses soudures. Ce matériel est uti lisé par un personnel très qualifié qui, bien qu'averti, par expérience, de la fragi lité de ces instruments, ne peut éviter des cassures très fréquentes des câbles qui assurent l'ouverture et la fermeture des mâchoires desdits instruments. Il faut considérer que ces pinces, en raison de leur destination et de leur mode d'emploi, ont des dimensions très réduites et que les câbles qui commandent l'ouverture et la fermeture de leurs mâchoires sont extrêmement fins. D'autre part, il faut remarquer que la pression que l'on doit exercer sur la poignée pour assurer le mouvement des mâchoires doit être assez forte pour pouvoir prélever en découpant (et non pas en déchirant et en arrachant) des particules de tissus ou des muqueuses. Toutefois, cette pression ne peut se mesurer et se contrôler avec précision, de sorte qu'elle est laissée à l'appréciation du manipulateur qui ne l'évalue pas toujours correctement, ce qui est La cause de rupture des câbles ou de Lâchage des soudures.Biopsy forceps currently used for taking samples of tissue fragments or the like from living organisms, for example, for microscopic examinations, include cutting jaws actuated by a control device comprising a handle remote from said jaws and connected to these by a system of extremely fragile and relatively complex cables and articulated parts, assembled by numerous welds. This material is used by highly qualified personnel who, although warned by experience of the fragility of these instruments, cannot avoid very frequent breakage of the cables which ensure the opening and closing of the jaws of said instruments. Consider that these pliers, because of their destination and their instructions for use, have very small dimensions and that the cables that control the opening and closing of their jaws are extremely thin. On the other hand, it should be noted that the pressure that must be exerted on the handle to ensure the movement of the jaws must be strong enough to be able to take samples by cutting (and not by tearing and tearing) particles of tissue or mucous membranes. However, this pressure does not can be measured and controlled with precision, so that it is left to the discretion of the manipulator who does not always evaluate it correctly, which is the cause of cable breakage or loose welds.
D'autre part, on observe que si le câble ne casse pas après quelques interventions. L'usage de la pince devient rapidement impossible en raison du fait que Le sang qui pénètre à L'intérieur de La gaine du câble se coagule et provoque Le blocage dudit câble. Ce phénomène se produit malgré les soins apportés au nettoyage et à La stérilisation des instruments, ces opérations ne parvenant pas à éliminer totalement Le sang ou autres Liquides ou résidus qui pénètrent dans La gaine pendant les interventions dans les organes visités. La stérilisation par la chaleur n'apporte aucune amélioration mais, au contraire, participe au séchage et à La coagulation du sang dans la gaine.On the other hand, we observe that if the cable does not break after a few interventions. The use of the clamp quickly becomes impossible due to the fact that the blood which penetrates inside the sheath of the cable coagulates and causes the blocking of said cable. This phenomenon occurs despite the care taken in cleaning and sterilizing the instruments, these operations failing to completely eliminate the blood or other liquids or residues which enter the sheath during the interventions in the organs visited. Heat sterilization does not bring any improvement but, on the contrary, takes part in the drying and the coagulation of the blood in the sheath.
Les inconvén ents ci-dessus conduisent à faire effectuer de fréquentes réparations coûteuses par des spécialistes de ce type de travaux.The above drawbacks lead to frequent costly repairs being carried out by specialists in this type of work.
Un autre inconvénient des pinces à biopsie actuelles réside dans le fait que leur diamètre est trop important pour permettre d'envisager Leur emploi en association avec des endoscopes de diamètre plus réduit que celui de ceux qui sont actuellement utilisés, comme cela est pourtant souhaitable.Another disadvantage of current biopsy forceps lies in the fact that their diameter is too large to allow their use to be envisaged in association with endoscopes of smaller diameter than that of those currently used, as is however desirable.
Un objectif de La présente invention est de remédier à ces inconvénients. Selon l'invention, ce but est atteint grâce à un procédé et à un dispositif suivant Lesquels l'une au moins des mâchoires de La pince est fixée, au moyen d'une articulation, à L'extrémité de La tige d'un piston Logé, avec une aptitude de coulissement étanche, dans un cylindre dans lequel il délimite une chambre à vide et dont le recul entraînant la fermeture desdites mâchoires est obtenu en mettant ladite chambre à vide en relation avec une source de vide ou d'aspiration, tandis que l'ouverture des mâchoires est assurée par un ressort de compression qui repousse le piston vers l'avant lorsque la chambre à vide n'est plus sous vide. Ce procédé et ce dispo.sitif procurent de nombreux et importants avantages.An objective of the present invention is to remedy these drawbacks. According to the invention, this object is achieved by a method and a device according to which at least one of the jaws of the clamp is fixed, by means of an articulation, to the end of the rod of a piston. Housed, with a sealed sliding ability, in a cylinder in which it delimits a vacuum chamber and whose recoil causing the closure of said jaws is obtained by putting said vacuum chamber in relation to a vacuum or suction source, while the opening of the jaws is ensured by a compression spring which pushes the piston forward when the vacuum chamber does not is no longer under vacuum. This process and this device provide numerous and important advantages.
Ils sont simples et très efficaces. Leur mise en oeuvre est grandement facilitée par le fait que toutes les chambres ou salles d'opération des hôpitaux et cliniques sont équipées d'une prise de vide dont La puissance de vide est suffisante pour faire fonctionner La pince.They are simple and very effective. Their implementation is greatly facilitated by the fact that all the rooms or operating rooms of hospitals and clinics are equipped with a vacuum outlet whose vacuum power is sufficient to operate the clamp.
Cette dernière ne peut être sujette à aucune cassure en cours d'intervention, en raison de la suppression du câble de tension dont sont munies Les pinces à biopsie conventionnelles. De ce fait, on peut envisager une durée de fonctionnement des pinces selon l'invention de 10 à 20 fois plus longue que celle des instruments existants.The latter cannot be subject to any break during intervention, due to the removal of the tension cable with which conventional biopsy forceps are fitted. Therefore, one can consider an operating life of the clamps according to the invention from 10 to 20 times longer than that of existing instruments.
Grâce à la pince selon l'invention, l'hygiène est totalement assurée, en raison de l'absence de sang ou autre liquide à l'intérieur de la gaine souple raccordée au cylindre, cette gaine étant parfaitement hermétique du fait du principe de fonctionnement deThanks to the clamp according to the invention, hygiene is completely ensured, due to the absence of blood or other liquid inside the flexible sheath connected to the cylinder, this sheath being perfectly hermetic due to the operating principle of
L'instrument. On observe en outre que le nettoiement de La pince est simplifié. En effet, comme cela ressort de l'exposé qui suit, un simple pas de vis permet de La dissocier de La gaine et, ainsi, de la désinfecter par des moyens plus simples et aussi efficaces que ceux employés actueLlement et qui sont basés sur la chaleur.The instrument. It is further observed that the cleaning of the forceps is simplified. Indeed, as is apparent from the following description, a simple thread allows it to be dissociated from the sheath and, thus, to disinfect it by means simpler and as effective as those currently used and which are based on the heat.
Compte tenu de l'absence de transmission mécanique entre la pince et son système de commande, La longueur de la gaine peut être pratiquement i llimitée ; le dispositif selon l'invention permet ainsi l'accès à des mécanismes ou à l'intérieur de ceux-ci, sans la moindre restriction de Longueur.Given the absence of mechanical transmission between the gripper and its control system, the length of the sheath can be practically limited; the device according to the invention thus allows access to or inside mechanisms, without the less length restriction.
Une importante gamme de mâchoires de confoi— mations différentes peut être proposée aux utilisateurs, en fonction des besoins. Par exemple. Leurs dimensions peuvent varier selon les prélèvements à effectuer ou selon Le diamètre de L'endoscope, dans le cas d'une application médicale.A wide range of jaws of different confusions can be offered to users, as required. For example. Their dimensions can vary according to the samples to be taken or according to the diameter of the endoscope, in the case of a medical application.
Les buts, avantages et caractéristiques ci-dessus, et d'autres encore, ressortiront mieux de la description qui suit et des dessins annexés dans Lesquels :The aims, advantages and characteristics above, and others still, will emerge more clearly from the description which follows and from the appended drawings in which:
La figure 1 est une vue en élévation et de face du dispositif de préhension selon L'invention.Figure 1 is an elevational front view of the gripping device according to the invention.
La figure 2 est une vue en coupe longitudinale de ce dispositif considérée suivant un plan perpendiculaire à L'axe de pivotement des mâchoires de La pince représentée en position d'ouverture et de repos.Figure 2 is a longitudinal sectional view of this device considered along a plane perpendicular to the pivot axis of the jaws of the clamp shown in the open and rest position.
La figure 3 est une vue analogue à La figure 2 et montrant La pince en position de fermeture.Figure 3 is a view similar to Figure 2 and showing The clamp in the closed position.
La figure 4 est une vue en élévation avec coupe longitudinale partielle considérée suivant un plan perpendiculaire à celui des figures 2 et 3.FIG. 4 is an elevation view with partial longitudinal section considered along a plane perpendicular to that of FIGS. 2 and 3.
La figure 5 est une vue éclatée, en perspective, de l'extrémité antérieure de la pince.Figure 5 is an exploded perspective view of the front end of the clamp.
On se reporte auxdits dessins pour décrire un exemple avantageux de mise en oeuvre et de réalisation du procédé et du dispositif de préhension selon L ' invention. On précise que si L'on décrit, dans L'exposé qui suit, une application particulièrement intéressante de ce dispositif à la réalisation d'une pince à biopsie, ledit dispositif et son procédé peuvent être utilisés à d'autres fins pour la préhension ou Le prélèvement d'échanti llons, fragments ou particules de nature diverse (organiques, minéraux ou autres). Le dispositif selon l'invention comprend un cylindre 1 dans Lequel est monté, avec une aptitude de coulisse ent axial étanche, un piston 2 avantageusement équipé d'un joint périphérique *3: Ce piston est solidaire d'une tige axiale d'entraînement 4 Laquelle, pour une commodité de fabrication et de montage, est, de préférence, fixée par vissage, audit piston. Dans ce but, le piston comprend un taraudage axial et l'extrémité de La tige d'entraînement 4 est munie d'un doigt axial fileté 4a se vissant dans ledit taraudage. Ce doigt fileté présente un diamètre plus réduit que celui de la tige et, entre les surfaces disposées en regard de L'extrémité de la tige et du piston, est disposé un joint d'étanchéité annulaire 5 qui peut être partiellement Logé dans une gorge circulaire ménagée dans La surface en forme de couronne circulaire de ladite extrémité.Reference is made to said drawings to describe an advantageous example of implementation and embodiment of the method and of the gripping device according to the invention. It should be pointed out that if The following description describes a particularly interesting application of this device for producing biopsy forceps, said device and its method can be used for other purposes for gripping or The taking of samples, fragments or particles of various kinds (organic, mineral or other). The device according to the invention comprises a cylinder 1 in which is mounted, with a watertight axial sliding ability, a piston 2 advantageously equipped with a peripheral seal * 3: This piston is integral with an axial drive rod 4 Which, for ease of manufacture and assembly, is preferably fixed by screwing to said piston. For this purpose, the piston comprises an axial thread and the end of the drive rod 4 is provided with a threaded axial finger 4a screwed into said thread. This threaded finger has a smaller diameter than that of the rod and, between the surfaces arranged opposite the end of the rod and of the piston, an annular seal 5 is arranged which can be partially housed in a circular groove. formed in the circular crown-shaped surface of said end.
Le piston 2 ainsi réalisé déli ite, à l'intérieur du cylindre 1 et par sa face arrière, une chambre 20 que l'on appellera "chambre à vide" dans la suite du présent exposé.The piston 2 thus produced deli ite, inside the cylinder 1 and by its rear face, a chamber 20 which will be called "vacuum chamber" in the rest of this presentation.
Un ressort 6 agissant en compression et logé dans la chambre à vide 20, prend appui, par l 'intermédiaire de ses extrémités opposées, d'une part, contre La face postérieure du piston 2 et, d'autre part, contre une butée circulaire ou diamétrale 7 dont est munie, intérieurement, La partie postérieure du cylindre 1. Le ressort 6 tend à repousser en permanence le piston 2 vers L'avant.A spring 6 acting in compression and housed in the vacuum chamber 20, bears, by means of its opposite ends, on the one hand, against the rear face of the piston 2 and, on the other hand, against a circular stop or diametral 7 which is provided, internally, The rear part of the cylinder 1. The spring 6 tends to constantly push the piston 2 forward.
La partie arrière 1a du cylindre 1 présente avantageusement un diamètre plus réduit que celui de la portion restante de celui-ci et cette partie arrière est dotée d'un filetage par l'intermédiaire duquel elle est raccordée à une gaine souple 8 (dont on a seulement représenté une partie terminale sur les dessins) dont la longueur peut être variable et qui est raccordée à un dispositif de commande qui peut être constitué par une poignée d'un type connu en soi comportant une vanne manoeuvrable au moyen d'un Levier pivotant ou d'un bouton-poussoir. Ce dispositif de commande est équipé d'un tuyau muni de raccords permettant son branchement à une source d ' aspi ration'ou de vide. On ne décrit pas ces dispositifs de commande et de branchement qui n'entrent pas, en soi, dans Le cadre de l'invention et qui peuvent être constitués par un appareillage connu. De manière préférée, pour une commodité de fabrication et de montage, Le cylindre 1 peut être exécuté en deux parties 1b, 1c, assemblées par vissage. Le piston 2 coulisse dans la partie postérieure 1b, tandis que la tige 4 est montée avec une aptitude de coulissement dans la partie antérieure 1c.The rear part 1a of the cylinder 1 advantageously has a smaller diameter than that of the remaining portion thereof and this rear part is provided with a thread by means of which it is connected to a flexible sheath 8 (of which only shown a terminal part in the drawings) whose length can be variable and which is connected to a control device which can be constituted by a handle of a type known per se comprising a valve which can be operated by means of a pivoting lever or a push button. This control device is equipped with a pipe provided with connections for connecting it to a source of aspi ration 'or vacuum. These control and connection devices are not described, which do not, per se, fall within the scope of the invention and which may be constituted by known apparatus. Preferably, for convenience of manufacture and assembly, the cylinder 1 can be executed in two parts 1b, 1c, assembled by screwing. The piston 2 slides in the rear part 1b, while the rod 4 is mounted with a sliding ability in the front part 1c.
La pince proprement dite est installée en avant de la partie antérieure 1c du cylindre et elle est constituée de deux mâchoires 9.The clamp itself is installed in front of the front part 1c of the cylinder and it consists of two jaws 9.
L'une au moins des deux mâchoires 9 est mobile et fixée, au moyen d'une articulation, à L'extrémité avant de La tige 4. Toutefois, de manière préférée, les deux mâchoires 9 sont mobiles et sont fixées au moyen d'une articulation sur l'extrémité avant de ladite tige. De manière avantageuse, les deux mâchoires 9 sont fixées au moyen d'une articulation comprenant un axe commun 10. Les mâchoires 9 comportent, chacune, une branche de fixation 11 dont l'extrémité est munie d'un trou 12 et Lesdites extrémités sont Logées dans une chape d'articulation 13 constituant l'extrémité avant de La tige 4 et également pourvue de trous alignés 14. L'axe 10 traverse les trous 12 et 14, et il est bloqué dans ces derniers, par l'intermédiaire de ses extrémités opposées.At least one of the two jaws 9 is mobile and fixed, by means of an articulation, to the front end of the rod 4. However, preferably, the two jaws 9 are mobile and are fixed by means of a joint on the front end of said rod. Advantageously, the two jaws 9 are fixed by means of an articulation comprising a common axis 10. The jaws 9 each have a fixing branch 11 the end of which is provided with a hole 12 and said ends are housed in a hinge yoke 13 constituting the front end of the rod 4 and also provided with aligned holes 14. The axis 10 passes through the holes 12 and 14, and it is locked in the latter, by means of its ends opposite.
Une barrette écarteuse 15 est fixée diamétralement à la partie avant du cylindre 1. Cette barrette fixe est disposée parallèlement à l'axe 10 d'articulation des mâchoires et elle est placée en avant de ce dernier. D'autre part, elle est disposée entre les branches de fixation 11 des mâchoires.A spreader bar 15 is fixed diametrically to the front part of the cylinder 1. This fixed bar is arranged parallel to the axis 10 articulation of the jaws and it is placed in front of the latter. On the other hand, it is arranged between the fixing branches 11 of the jaws.
Une échancrure 16 est ménagée à l'extrémité avant de la paroi latérale du cylindre 1, dans le plan de basculement de la branche de fixation et d'articulation 11 de la mâchoire mobi le ou de chaque mâchoire mobile 9, afin de permettre le passage de ladite branche, Lors du pivotement de la ou desdites mâchoires mobiles vers l'extérieur.A notch 16 is provided at the front end of the side wall of the cylinder 1, in the tilting plane of the fixing and articulation branch 11 of the movable jaw or each movable jaw 9, in order to allow passage of said branch, during the pivoting of said movable jaw or jaws towards the outside.
Les branches d'articulation 11 ont un bord extérieur convexe 11a qui forme une rampe de guidage glissant sur le fond des echancrures 16, en favorisant le mouvement de pivotement des mâchoires dans les positions d'ouverture ou de fermeture.The articulation branches 11 have a convex outer edge 11a which forms a guide ramp sliding on the bottom of the notches 16, favoring the pivoting movement of the jaws in the open or closed positions.
Les mâchoires 9 peuvent avoir différentes conformations adaptées aux fonctions qu'elles sont appelées à remplir.The jaws 9 can have different conformations adapted to the functions they are called upon to perform.
Dans l'application à la réalisation de pinces à biopsie ou autres pinces destinées à effectuer des prélèvements de fragments de matière, les mâchoires 9 peuvent comporter, dans leur face interne, une concavité 17 sensiblement hémisphérique délimitée par un bord coupant 18 dans sa demi-partie avant. Lorsque La pince est fermée, les mâchoires rapprochées délimitent une cavité sensiblement sphérique suffisamment importante pour renfermer un fragment du tissu, échanti llon biologique ou autre pré levé. D'autre part, un orifice 19 débouchant à l'extérieur est ménagé dans le fond des concavités 17 des mâchoires 9, afin de permettre l'évacuation du sang ou Liquide imprégnant le fragment de tissu ou autre prélevé.In the application to the production of biopsy forceps or other forceps intended for taking samples of fragments of material, the jaws 9 may comprise, on their internal face, a concavity 17 substantially hemispherical delimited by a cutting edge 18 in its half front part. When the forceps are closed, the jaws close together delimit a substantially spherical cavity large enough to contain a fragment of the tissue, biological sample or other pre-emergent sample. On the other hand, an orifice 19 opening to the outside is formed in the bottom of the concavities 17 of the jaws 9, in order to allow the evacuation of the blood or liquid impregnating the fragment of tissue or other sample taken.
Pour éviter de blesser les tissus ou muqueuses des organes visités, l'extré ité antérieure de la surface extérieure des mâchoires comporte une conformation arrondie, dépourvue d'arête vive.To avoid injuring the tissues or mucous membranes of the organs visited, the anterior end of the outer surface of the jaws has a rounded conformation, devoid of sharp edges.
On conçoit bien La mise en oeuvre du procédé et du dispositif de préhension selon l'invention. Dans l'application à La réalisation de pinces à biopsie, la pince et sa gaine souple sont Logées dans un endoscope par L'intermédiaire duquel Ladite pince est amenée à l'emplacement de prélèvement souhaité.The implementation of the method and of the gripping device according to the invention is well understood. In the application to the production of biopsy forceps, the forceps and its flexible sheath are housed in an endoscope through which said forceps are brought to the desired sampling location.
En position de repos, Le piston 2 est repoussé vers L'avant sous L'action du ressort 6 et Les mâchoires 9 sont écartées dans La position d'ouverture (fi gure 2) .In the rest position, the piston 2 is pushed forward under the action of the spring 6 and the jaws 9 are moved to the open position (Figure 2).
Lorsque la chambre à vide 20 est m se en relation avec la source de vide, la dépression créée dans ladite chambre provoque le recul du piston 2 à l'encontre de l'action antagoniste du ressort 6 qui se trouve comprimé lors de ce recul. Ledit ressort étant taré à une valeur inférieure à la force d'aspiration exercée par la source de vide. Le déplacement du piston vers l'arrière entraine la fermeture de la pince dont les mâchoires 9 se trouvent rapprochées par l'action du fond des echancrures 16 contre Lequel glisse le bord externe convexe 11a des branches d'articulation 11 desdites mâchoires. Lorsqu'on interrompt La communication entre la chambre à vide 20 et la source de vide, Le ressort 6 repousse le piston 2 vers l'avant. Lors de ce mouvement, la barrette écarteuse 15 contre laquelle glisse Le bord interne des branches d'articulation 11 des mâchoires 9, provoque Le basculement de ces dernières dans la position d'ouverture. When the vacuum chamber 20 is connected with the vacuum source, the vacuum created in said chamber causes the piston 2 to recede against the antagonistic action of the spring 6 which is compressed during this recoil. Said spring being calibrated to a value lower than the suction force exerted by the vacuum source. The displacement of the piston backwards causes the clamp to close, the jaws 9 of which are brought together by the action of the bottom of the notches 16 against which slides the convex external edge 11a of the articulation branches 11 of said jaws. When communication between the vacuum chamber 20 and the vacuum source is interrupted, the spring 6 pushes the piston 2 forward. During this movement, the spreader bar 15 against which the internal edge of the articulation branches 11 of the jaws 9 slides, causes the latter to tilt in the open position.

Claims

R E V E N D I C A T I O N S
1. - Dispositif de préhension tel que, par exemple, pince à biopsie, caractérisé en ce qu'i l comporte un piston (2) monté avec une aptitude de coulissement étanche dans un cylindre (1) à L'intérieur duquel i l 5 délimite une chambre à vide, ce piston (2) étant solidaire d'une tige d'entraînement (4) à l'extrémité de laquelle est fixée, au moyen d'une articulation, au moins l'une des deux mâchoires (9) d'une pince, un ressort de compression (6) logé dans ledit cylindre (1) 10 étant calé contre ledit piston qu'i l tend à repousser vers l'avant ; ledit dispositif comprenant encore des moyens (8) permettant de le relier à une source de vide.1. - Gripping device such as, for example, biopsy forceps, characterized in that it comprises a piston (2) mounted with a sealed sliding ability in a cylinder (1) inside which it delimits a vacuum chamber, this piston (2) being integral with a drive rod (4) at the end of which is fixed, by means of a joint, at least one of the two jaws (9) d 'a clamp, a compression spring (6) housed in said cylinder (1) being wedged against said piston which i t tends to push forward; said device further comprising means (8) for connecting it to a vacuum source.
2. - Dispositif selon la revendication 1, caractérisé 15 en ce que les deux mâchoires (9) de la pince sont fixées, au moyen d'une articulation, à l 'extrémité de la tige d'entraînement (4).2. - Device according to claim 1, characterized in that the two jaws (9) of the clamp are fixed, by means of a hinge, at the end of the drive rod (4).
3. - Dispositif suivant La revendication 2, caractérisé en ce que les deux mâchoires mobiles (9) sont fixées au3. - Device according to claim 2, characterized in that the two movable jaws (9) are fixed to the
_ moyen d'un axe d'articulation commun (10) ._ by means of a common articulation axis (10).
4. - Dispositif selon La revendication 3, caractérisé en ce qu'une barrette écarteuse (15) est fixée diamétralement à l'extrémité avant du cylindre (1), parallèlement à L'axe (10) d'articulation des mâchoires 5 (9) et en avant de ce dernier, ladite barrette fixe étant disposée entre Les branches (11) de fixation et d'articulation desdites mâchoires.4. - Device according to claim 3, characterized in that a spreader bar (15) is fixed diametrically to the front end of the cylinder (1), parallel to the axis (10) of articulation of the jaws 5 (9 ) and in front of the latter, said fixed bar being disposed between the branches (11) for fixing and articulation of said jaws.
5. - Dispositif suivant l'une quelconque des revendications 1 à 4, caractérisé en ce qu'une 0 échancrure (16) est ménagée à l'extrémité avant de la paroi Latérale du cylindre (1), dans le plan de pivotement de la branche (11) de fixation et d'articulation de la mâchoire mobile (9) ou de chaque mâchoire mobile (9).5. - Device according to any one of claims 1 to 4, characterized in that a 0 notch (16) is formed at the front end of the Side wall of the cylinder (1), in the pivoting plane of the branch (11) for fixing and articulation of the movable jaw (9) or of each movable jaw (9).
6. - Dispositif suivant la revendication 5, caractérisé en ce que Les branches de fixation et d'articulation C11) des mâchoires (9) ont un bord externe convexe (11a).6. - Device according to claim 5, characterized in that the fixing and articulation branches C11) of the jaws (9) have a convex outer edge (11a).
7. - Dispositif selon la. revendication 1, caractérisé en ce que les mâchoires 9 comportent, dans Leur face interne, une concavité (17), par exemple de forme sensiblement hémisphérique, ladite concavité étant délimitée par un bord coupant (18) dans sa demi-partie avant .7. - Device according to the. Claim 1, characterized in that the jaws 9 comprise, in their internal face, a concavity (17), for example of substantially hemispherical shape, said concavity being delimited by a cutting edge (18) in its front half-part.
8. - Dispositif suivant la revendication 7, caractérisé en ce qu'un orifice (19) débouchant à L'extérieur est ménagé dans Le fond des concavités (17) des mâchoires (9).8. - Device according to claim 7, characterized in that an orifice (19) opening to the outside is formed in the bottom of the concavities (17) of the jaws (9).
9. - Dispositif selon la revendication 1, caractér sé en ce qu'il comporte une gaine souple (8) permettant de le relier à une source de vide, la partie postérieure (1a) du cylindre (1) étant agencée pour permettre son raccordement à cette gaine.9. - Device according to claim 1, characterized in that it comprises a flexible sheath (8) allowing it to be connected to a source of vacuum, the rear part (1a) of the cylinder (1) being arranged to allow its connection to this sheath.
10. - Procédé de préhension, par exemple pour biopsie, caractérisé en ce que l'une au moins des mâchoires (9) d'une pince est fixée, au moyen d'une articulation, à L'extrémité de La tige (4) d'un piston (2) monté, avec une aptitude de coulissement étanche, dans un cylindre (1) dans lequel i l délimite une chambre à vide (20), et en ce que la fermeture desdites mâchoires (9) est obtenue en mettant Ladite chambre à vide (20) en relation avec une source de vide permettant de créer une dépression qui entraine le recul dudit piston (2) et le rapprochement de ces dernières. 10. - Gripping method, for example for biopsy, characterized in that at least one of the jaws (9) of a clamp is fixed, by means of a joint, to the end of the rod (4) a piston (2) mounted, with a sealed sliding ability, in a cylinder (1) in which it delimits a vacuum chamber (20), and in that the closing of said jaws (9) is obtained by placing said vacuum chamber (20) in relationship with a vacuum source making it possible to create a depression which causes the recoil of said piston (2) and the bringing together of the latter.
PCT/FR1989/000415 1988-08-11 1989-08-09 Gripping device and method, for example for biopsy WO1990001297A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810930A FR2635260B1 (en) 1988-08-11 1988-08-11 GRIPPING METHOD AND DEVICE, FOR EXAMPLE FOR BIOPSY
FR88/10930 1988-08-11

Publications (1)

Publication Number Publication Date
WO1990001297A1 true WO1990001297A1 (en) 1990-02-22

Family

ID=9369347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1989/000415 WO1990001297A1 (en) 1988-08-11 1989-08-09 Gripping device and method, for example for biopsy

Country Status (4)

Country Link
EP (1) EP0428607A1 (en)
AU (1) AU4181689A (en)
FR (1) FR2635260B1 (en)
WO (1) WO1990001297A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564176A1 (en) * 1992-03-30 1993-10-06 SMITH & NEPHEW RICHARDS, INC. Ankle clamp
EP0573817A1 (en) * 1992-06-08 1993-12-15 C.R. Bard, Inc. Disposable biopsy forceps
EP0593929A1 (en) * 1992-09-23 1994-04-27 United States Surgical Corporation Surgical biopsy forceps apparatus
US5338317A (en) * 1991-05-03 1994-08-16 Vance Products Incorporated Rotational surgical instrument handle
WO1997012558A1 (en) * 1995-10-03 1997-04-10 Kelleher Brian S Flexible forceps device
US7909850B2 (en) 1999-10-25 2011-03-22 Boston Scientific Scimed, Inc. Forceps for medical use
US7942896B2 (en) 2003-11-25 2011-05-17 Scimed Life Systems, Inc. Forceps and collection assembly and related methods of use and manufacture
US8083686B2 (en) 2003-09-10 2011-12-27 Boston Scientific Scimed, Inc. Forceps and collection assembly with accompanying mechanisms and related methods of use
US8469993B2 (en) 2003-06-18 2013-06-25 Boston Scientific Scimed, Inc. Endoscopic instruments
US9681857B2 (en) 2003-06-18 2017-06-20 Boston Scientific Scimed, Inc. Endoscopic instruments and methods of manufacture
US9687246B2 (en) 2013-10-17 2017-06-27 Cook Medical Technologies Llc Release mechanism
CN112754543A (en) * 2021-01-11 2021-05-07 绍兴市柯桥区妇幼保健院 Cervical biopsy forceps with reliable positioning function

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767052B1 (en) * 1997-08-07 1999-11-19 Jean Marie Hugueny IMPROVED PINCHING DEVICE, PARTICULARLY OF THE BIOPSY PLIER TYPE
FR2767053B1 (en) * 1997-08-07 1999-11-19 Jean Marie Hugueny COAGULATION PINCHING DEVICE
CN108272489B (en) * 2018-02-07 2019-08-09 樊超 A kind of Medical forceps
CN108158659B (en) * 2018-03-04 2021-07-02 青岛市中医医院 Endoscope operation mechanical arm device
CN108567453A (en) * 2018-03-15 2018-09-25 郭子恒 A kind of new-type multi-purpose gun-shaped surgical dilator
CN111544116B (en) * 2020-04-26 2021-05-11 高胜利 Minimally invasive robot assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1378136A (en) * 1963-09-13 1964-11-13 Pliers
DE1225813B (en) * 1961-10-23 1966-09-29 Optique Et Prec De Levallois S Suction biopsy probe
FR2459707A1 (en) * 1979-06-22 1981-01-16 Hydraulique Fse Ram-operated pincers with adjustable grip pressure - use return sprung two-way ram pincer motor fed through piston rod bore of main two way ram
DE8712328U1 (en) * 1987-09-11 1988-02-18 Jakoubek, Franz, 7201 Emmingen-Liptingen, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1225813B (en) * 1961-10-23 1966-09-29 Optique Et Prec De Levallois S Suction biopsy probe
FR1378136A (en) * 1963-09-13 1964-11-13 Pliers
FR2459707A1 (en) * 1979-06-22 1981-01-16 Hydraulique Fse Ram-operated pincers with adjustable grip pressure - use return sprung two-way ram pincer motor fed through piston rod bore of main two way ram
DE8712328U1 (en) * 1987-09-11 1988-02-18 Jakoubek, Franz, 7201 Emmingen-Liptingen, De

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5338317A (en) * 1991-05-03 1994-08-16 Vance Products Incorporated Rotational surgical instrument handle
EP0564176A1 (en) * 1992-03-30 1993-10-06 SMITH & NEPHEW RICHARDS, INC. Ankle clamp
EP0573817A1 (en) * 1992-06-08 1993-12-15 C.R. Bard, Inc. Disposable biopsy forceps
EP0593929A1 (en) * 1992-09-23 1994-04-27 United States Surgical Corporation Surgical biopsy forceps apparatus
WO1997012558A1 (en) * 1995-10-03 1997-04-10 Kelleher Brian S Flexible forceps device
US7909850B2 (en) 1999-10-25 2011-03-22 Boston Scientific Scimed, Inc. Forceps for medical use
US8469993B2 (en) 2003-06-18 2013-06-25 Boston Scientific Scimed, Inc. Endoscopic instruments
US9681857B2 (en) 2003-06-18 2017-06-20 Boston Scientific Scimed, Inc. Endoscopic instruments and methods of manufacture
US8083686B2 (en) 2003-09-10 2011-12-27 Boston Scientific Scimed, Inc. Forceps and collection assembly with accompanying mechanisms and related methods of use
US8460205B2 (en) 2003-09-10 2013-06-11 Boston Scientific Scimed, Inc. Forceps and collection assembly with accompanying mechanisms and related methods of use
US7942896B2 (en) 2003-11-25 2011-05-17 Scimed Life Systems, Inc. Forceps and collection assembly and related methods of use and manufacture
US9687246B2 (en) 2013-10-17 2017-06-27 Cook Medical Technologies Llc Release mechanism
CN112754543A (en) * 2021-01-11 2021-05-07 绍兴市柯桥区妇幼保健院 Cervical biopsy forceps with reliable positioning function

Also Published As

Publication number Publication date
AU4181689A (en) 1990-03-05
FR2635260B1 (en) 1990-11-09
FR2635260A1 (en) 1990-02-16
EP0428607A1 (en) 1991-05-29

Similar Documents

Publication Publication Date Title
WO1990001297A1 (en) Gripping device and method, for example for biopsy
EP0327410B1 (en) Multifunctional operatory laparoscopy device permitting to execute different operatory actions with instruments introduction
FR2776180A1 (en) Implanting device for small diameter capillary graft
CA2261592C (en) Biopsy forceps type clamping device
EP1357845A1 (en) Endoscopic rongeur-type surgical instrument
WO1998049951A1 (en) Modular device for endoscopic surgery and standard surgery
EP0840626B1 (en) Surgical dissection instrument using a high-pressure liquid jet
FR2694180A1 (en) Laparoscopic forceps with angulation.
FR2955242A1 (en) MEDICAL ENDOSCOPE COMPRISING A CONSUMABLE INSTRUMENT WITH CIRCUIT CIRCUIT OF A FLUID
EP1642541B1 (en) Device for cutting and implanting hair grafts
JP2019533556A (en) Retractable forceps
EP3509503B1 (en) Endoscopic needle carrier
FR3015218A1 (en) ROTARY AND PLIABLE MEDICAL INSTRUMENT
FR2689384A1 (en) Self-locking trocar.
EP2753245B1 (en) Device for the laparoscopic removal of a superficial cylindrical sample of a human or animal body tissue
EP1296596B1 (en) Clamp for medical use comprising two articulated jaws
FR2948596A1 (en) MANIPULATOR HAND HELD AND SYMMETRIC PRETENSION
WO2021144513A1 (en) Handle with a mechanism for controlling the bending of the head of a medical endoscope
EP0945105A1 (en) Rack guide for a sampling device, e.g. a biopsy forceps
FR2829396A1 (en) Selective control unit for access to interior of catheter has switching element moved in one direction for both opening and closing
FR2644056A1 (en) (Surgical) clamp forceps
EP1042999A1 (en) Holder for an intraocular lens
FR2766084A1 (en) Supple or rigid endoscopic or coeloscopic surgical instrument
EP0516494A1 (en) Miniaturised forceps medical instrument for celio-surgery
BE1006566A6 (en) Surgical instrument, particularly for so-called non-invasive surgery

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR DK FI HU JP KP NO SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1989909574

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1989909574

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1989909574

Country of ref document: EP