WO2007014513A1

WO2007014513A1 - A turnoverable stapler anvil assembly

Info

Publication number: WO2007014513A1
Application number: PCT/CN2006/001758
Authority: WO
Inventors: Wang-Dong Chen; Jiang Lin; Wei-Zhong Yin
Original assignee: Suzhou Touchstone International Medical Science Co., Ltd.
Priority date: 2005-08-04
Filing date: 2006-07-19
Publication date: 2007-02-08
Also published as: CN100435744C; CN1907239A

Abstract

A stapler anvil assembly of surgical staplers is provided. It includes a stapler anvil ring (3), a knife anvil (4) and a stapler anvil shaft (6), the knife anvil (4) is arraged within the nail anvil ring (3), tightly contacting each other. The stapler anvil ring (3) is pivotly connected with the stapler anvil shaft (6), the connection area is provided with an elastic locking piece (5) and its complementary mechanism, which allow the stapler anvil ring (3) to turn over round the stapler anvil shaft (6). In operation, a annular cutting knife moves forward to cut off the knife anvil (4) ,and when the annular cutting knife moves backward, it carries off the inner ring of the knife anvil (4), the elastic locking piece (5) is springed back and replaced. Under the cooperation of the various complementary mechanism, the stapler anvil ring (3) may be turned over round the stapler anvil shaft (6).

Description

Reversible anvil assembly

Technical field

The present invention relates to a stapler used in surgery, in particular to an anvil assembly of a surgical stapler, and more particularly to an anvil assembly in which an anvil ring can be reversed after performing a binding operation, and belongs to the technical field of medical instruments.

technical background

A surgical stapler is a medical device that is often used in the surgical operation of physiological tissues such as the intestines. The difference in performance of the instrument plays a vital role in the overall surgical effect. Most of these type of binding machines adopt the axial internal binding method, and the two sections are restrained during binding, forming a binding ring inside the tissue. The advantages of this device are: Body bleeding during surgery can be discharged along with the contents, and the body tissue is easier to heal after surgery. However, since the anvil assembly and the cartridge assembly are respectively on both sides of the binding ring, the anvil assembly must pass through the binding ring when the binder is removed, and the maximum diameter of the anvil assembly is larger than the inner diameter of the binding ring for stapling Therefore, during the postoperative removal of the instrument, the anvil assembly must touch the binding ring and even destroy the shape of the binding ring. The existence of this phenomenon is not conducive to the recovery function of the postoperative body tissue, which may lead to surgical complications, side effects to the patient, and greatly reduce the surgical effect.

In view of the above situation, the prior art adopts the following steps: The nail forming groove is disposed as far as possible on the edge of the anvil ring, so that the maximum diameter of the anvil assembly is very close to the inside of the binding ring. The diameter of the anvil assembly is less likely to contact the binding ring when the instrument is removed. This alleviates the above technical problems to a certain extent, but the effect is not obvious, because in order to ensure the sealing effect of the binding ring, in general, the rafter forming groove should be provided at least two inner and outer rings, at this time, the maximum diameter of the anvil assembly and the binding ring There must be a large enough gap between the inner diameters. Therefore, this approach has limitations in design and processing. To solve problems better, we must find another way.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above problems of the prior art and to provide a reversible anvil assembly which is easy to remove after surgery and which has less influence on the binding ring.

The object of the invention is achieved by the following technical solutions:

The reversible anvil assembly comprises an anvil ring, an anvil and an anvil shaft, the anvil being placed inside the anvil ring in close contact with each other, wherein the anvil ring is pivotally connected to the anvil shaft, and is connected The region is provided with an elastic locking piece and an auxiliary mechanism for causing the anvil to be turned around the anvil shaft.

The object of the present invention can also be further achieved by the following technical measures:

The above-mentioned reversible anvil assembly, wherein: the anvil assembly is further provided with a rotating rod, the upper side of the rotating rod is a stepped truncated cone structure, fixed on the top of the anvil ring, and the lower side is a connecting rod, and is pivotally The anvil shaft is connected, and the elastic locking piece is sleeved on the connecting rod; the elastic locking piece is provided with a bayonet, a folded edge and an abutting surface. In the initial state, the inner ring of the anvil presses the folded edge of the elastic locking piece at the anvil Under the cooperation of the flipping block provided inside the ring, the central region of the elastic locking piece is reversely deformed, and the abutting surface abuts against the front end surface of the anvil shaft; the auxiliary mechanism cooperates with the elastic locking piece to make the anvil ring after the anvil assembly is used. Implement flipping. Further, the auxiliary mechanism may be a spring disposed between the rotating rod and the anvil shaft, the upper end of which is fixed on the buckle hole at the end of the rotating rod, and the lower end is pinned inside the anvil shaft, in the initial state, the spring It is in a stretched state; it may also be a block, which is disposed on the connecting rod portion of the rotating rod; or a blocking piece, one end of which is fixed on the elastic locking piece, and the other end is always abutted on the front end surface of the anvil shaft. And it can slide along the front end surface of the anvil shaft.

Further, when the auxiliary mechanism adopts a spring, the preferred solution is: the center position line of the pin and the pin and the spring pin on the anvil shaft are not parallel with the center line of the anvil shaft The state, in particular the pin on the anvil shaft for pinning the rotating rod, is in an eccentric position, which facilitates the spring action and causes the anvil ring to flip.

In addition, among the above various reversible anvil assemblies, the top of the reversible anvil assembly may also be provided with a nail anvil cap which is fixedly connected to the anvil ring by heat riveting or the like. The present invention is directed to the technical problems existing in the prior art surgical binding apparatus, and the universal integral anvil assembly is changed into a plurality of component assembly forms, and a rotating rod is disposed inside the rotating rod, and the rotating rod is sleeved with an elastic locking piece. The upper side of the rotating rod is fixed to the top of the anvil ring, and the lower connecting rod is pivotally connected to the anvil shaft. The anvil assembly and the staple cartridge assembly of the body portion of the stapler are connected by an anvil pull rod for performing a surgical binding operation: in an initial state, the inner ring of the anvil presses the folded edge of the elastic locking piece and is disposed inside the anvil ring Under the cooperation of the flipping block, the central region of the elastic locking piece is reversely deformed; during the operation, the binding device cuts the anvil while moving the knife while the binding device is being stapled, and then the cutter retreats to take the inner ring of the anvil, so that The elastic locking piece is rebounded under the action of its own elastic force. Under the cooperation of various auxiliary mechanisms arranged inside the anvil assembly, the anvil ring can be turned around the anvil shaft. Or, in the initial state, the outer ring of the elastic locking piece abuts against the inner side of the anvil. During the operation, the annular cutting knife presses the anvil to cut the elastic locking piece, and the blocking piece disposed on the elastic locking piece abuts against the front end of the anvil shaft. The elastic locking piece is turned over, and then the cutting blade is retracted to take away the inner ring of the anvil, the elastic locking piece is reset, and the blocking piece slides along the front end of the anvil shaft, so that the anvil is turned around the anvil shaft. In addition, the surgeon can properly tilt the binding body from the outside, and the entire binding device can be easily withdrawn. The program is beneficial to remove the instrument after the operation, and the probability of the influence of the anvil assembly on the binding ring is greatly reduced, further ensuring the surgical effect.

DRAWINGS

The structural features, assembly and use of the present invention will be described in detail below with reference to the accompanying drawings, and the technical aspects and features of the present invention are further described. Wherein: Figure 1 is an exploded exploded perspective view of the first embodiment after assembly;

Figure 2: Figure 2a is a perspective view of the elastic locking piece in a natural state, and Figure 2b is a perspective view of the elastic locking piece after being inverted from the center of Figure 2a;

Figure 3: Figure 3a is an axial cross-sectional view of the first embodiment after assembly, and Figure 3b is an axial cross-sectional view of Figure 3a after reversal;

Figure 4: Figure 4a is an axial cross-sectional view of another assembly of the first embodiment, and Figure 4b is an axial cross-sectional view of Figure 4a after reversal;

Fig. 5: Fig. 5a is an axial sectional view of the second embodiment after assembly, and Fig. 5b is an axial sectional view after Fig. 5a is inverted.

Figure 6: Figure 6a is an axial cross-sectional view of the third embodiment after assembly, and Figure 6b is an axial cross-section after the annular cutter compresses the elastic locking piece to reverse the deformation in the third embodiment. FIG. 6c is an axial cross-sectional view of FIG. 6b after the annular cutter is withdrawn and the anvil ring is turned over.

The meanings of the reference numerals in the figure are: 1 nail anvil cap, 2 - rotating rod, 3 - nail anvil ring, 4 anvil, 4, an anvil outer ring after cutting, 5 - elastic locking piece, 6 nail Anvil shaft, 7—spring, 8-pin, 9-pin, 10—pin hole, 11-slot, 12-groove, 13—turn-over block, 14-bay, 15-fold, 16-impedance , 17 - stop, 18 - stop, 19 a circular cutter.

detailed description

[[Example 1 3]

As shown in Figs. 1 to 4, the anvil assembly includes a nail anvil cap 1, a rotating rod 2, a nail anvil ring 3, an anvil 4, an elastic locking piece 5, and an anvil shaft 6. The anvil ring 3 is provided with a flipping block 13; the elastic locking piece 5 is provided with a bayonet 14 , a flange 15 and an abutting surface 16 ; the upper side of the rotating rod 2 is a stepped truncated cone structure and is fixed on the top of the anvil ring 3 The lower side is a connecting rod, and the connecting rod end is provided with a buckle hole 10, and the elastic locking piece 5 is sleeved outside the connecting rod.

During installation, the rotating rod 2 is first passed through and fixed to the anvil ring 3, the end 7 of the spring is inserted into the front end hole of the anvil shaft 6, and the end of the spring 7 is pinned by the pin 9 to elastically lock the piece. 5 sets on the rotating rod 2, and the other end of the spring 7 is placed in the buttonhole 10 of the rotating rod 2, and the rotating rod 2 and the anvil shaft 6 are pivotally connected by the pin 8. Then, the anvil cap 1 is inserted from the top to be fixed to the anvil ring 3; the anvil 4 is inserted from the bottom, and the bottom of the inner ring of the anvil 4 is pressed against the flange 15 of the elastic locking piece 5, and the knife is made The boss 11 on the outer ring of the anvil 4 is caught inside the recess 12 of the inner ring of the anvil ring 3. This will fix the anvil 4 and bounce The locking piece 5 is reversely deformed after being pressed, the abutting surface 16 abuts against the front end surface of the anvil shaft 6, and the bayonet 14 is caught on the cylindrical surface of the rotating rod 2, so that the rotating rod 2 and the anvil shaft 6 are at the same axial position. .

The anvil assembly and the staple cartridge assembly of the body portion of the stapler are coupled by a staple rod for use in performing a surgical staple surgery. During the operation, the binding device cuts the anvil 4 while moving the cutter while the binding tissue is being retracted. When the anvil assembly and the cartridge assembly are retracted, the cutter retracts and takes the inner ring of the anvil 4 away, so that the elastic locking piece 5 is Under the action of the self-elastic force, the rebound is reset, and the abutting surface 16 is disengaged from the front end surface of the anvil shaft 6. Under the pulling force of the spring 7, the rotating rod 2 and the anvil shaft 6 are deflected around the pin 8. Since the anvil shaft 6 is coupled to the stapler body by the anvil tie rod, the overall representation of the anvil assembly is reversed. In addition, the surgeon can easily tilt the entire binding device from the outside by appropriately tilting the binding body. The anvil assembly, especially the largest diameter anvil ring 3, contacts the binding ring formed after the internal operation of the tissue. And the degree of bruise can be minimized.

In order to facilitate the turning of the anvil ring 3 by the rotating rod 2, a better arrangement is: the center position of the two pins 8 and 9 for pinning the rotating rod 2 and the spring 7 on the anvil shaft 6 and the nail The center line of the anvil shaft 6 is not parallel and is in an intersecting state, especially the pin 8 is in an eccentric position, which facilitates the action of the spring 7 and causes the anvil ring to be turned over. Specifically, there are two ways of setting, that is, the pin 8 is set at the center, and the pin 9 is eccentrically set, as shown in Fig. 3a and Fig. 3b; the other is that the pin 9 is set at the center, and the pin 8 is eccentrically set, as shown in Fig. 1⁄2. And Figure 4b. II Embodiment 2 3

As shown in Figure 5a/5b. This embodiment is similar to the first embodiment except that the auxiliary turning mechanism is not a spring 7 but a stop 17. The stop 17 is disposed on the rotating lever 2 When the binding rod portion is retracted from the anvil assembly and the cartridge assembly, the cutter takes the inner ring of the anvil 4 which has just been cut away, and the elastic locking piece 5 is in abutment during the resetting process. The abutment 17 abuts against the fracture projection of the anvil outer ring 4' after the cutting, and the anvil assembly is reversed by the end of the anvil shaft 6 as a fulcrum.

K Example 3 3

As shown in Figure 6a/6b/6c. This embodiment is also similar to the first embodiment, except that: the inside of the anvil assembly is not provided with a rotating rod, and the anvil shaft 6 and the anvil ring 3 are directly connected in a pivotal manner; and the auxiliary turning mechanism is not a spring 7 but a spring The flap 18 has one end fixed to the elastic locking piece 5 at one end, and the other end always abuts against the front end surface of the anvil shaft 6, and is slidable along the front end surface of the anvil shaft 6.

In the initial state, the outer ring of the elastic locking piece 5 abuts against the inner side of the anvil 4. During the operation, the annular cutting blade 19 presses the anvil 4 to press the elastic locking piece 5, and the blocking piece 18 disposed on the elastic locking piece abuts against the anvil. The front end of the shaft 6 causes the elastic locking piece 5 to be turned over and fixed, and then the cutting blade 19 retreats to take the inner ring of the anvil away, the blocking piece 18 on the elastic locking piece 5 is reset, and the blocking piece 18 slides along the front end of the anvil shaft 6 Shifting causes the anvil ring 3 to flip around the anvil shaft 6.

In the above embodiments, in order to ensure that the inner ring of the anvil after cutting can be carried away smoothly by the cutter, a cutter having a concave hook on the wall can be selected for use in conjunction with the present invention, and the implementation effect is better.

Claims

Rights request

1. A reversible anvil assembly comprising an anvil ring [3], an anvil [4] and an anvil shaft [6], the anvil [4] being placed inside the anvil ring [3], the two being in intimate contact, The utility model is characterized in that: the anvil ring [3] is pivotally connected with the anvil shaft [6], and the connecting region is provided with an elastic locking piece which can make the anvil ring [3] reverse around the anvil shaft [6] [5] ] and auxiliary agencies.

2. The reversible anvil assembly according to claim 1, wherein: the anvil assembly is further provided with a rotating rod [2], and the upper side of the rotating rod [2] is a stepped truncated cone structure fixed to the anvil The top of the ring [3], the lower side is the connecting rod, and is connected to the anvil shaft [6] in a pivotal manner, the elastic locking piece [5] is placed on the connecting rod; the elastic locking piece [5] is provided with a bayonet [14], hemming [15] and resisting surface [16], in the initial state, the inner ring of the anvil [4] presses the flange [15] of the elastic locking piece [5] inside the anvil ring [3] Under the cooperation of the set flipping block [13], the central region of the elastic locking piece [5] is reversely deformed, and the abutting surface [16] abuts against the front end surface of the anvil shaft [6]; the auxiliary mechanism is in the anvil assembly After use, the anvil ring [3] is inverted with the elastic locking piece [5].

3. The reversible anvil assembly according to claim 2, wherein: the auxiliary mechanism is a spring [7] placed between the rotating rod [2] and the anvil shaft [6], The upper end is fixed on the button hole [10] at the end of the rotating rod [2], and the lower end pin is connected inside the anvil shaft [6]. In the initial state, the spring [7] is stretched.

4. The reversible anvil assembly according to claim 3, wherein: the anvil shaft [6] is used to pin the two pins [8] of the rotating rod [2] and the spring [7] and In [9] The heart position line is crossed with the center line of the anvil shaft [6].

5. The reversible anvil assembly according to claim 4, wherein: the pin [8] on the anvil shaft [6] for pinning the rotating rod [2] is in an eccentric position.

6. The reversible anvil assembly according to claim 2, wherein: the auxiliary mechanism is a stop [17] placed at a connecting rod portion of the rotating rod [2].

7. The reversible anvil assembly according to claim 1, wherein: the auxiliary mechanism is a blocking piece [18], one end of which is fixed on the elastic locking piece [5], and the other end is always abutted against the nail. The front end face of the anvil shaft [6] is slidable along the front end face of the anvil shaft [6].

8. The reversible anvil assembly according to claim 1, wherein: the anvil assembly is further provided with an anvil cap [1], and the anvil cap [1] is heated and riveted with the anvil ring [3]. ] Fixedly connected.