WO2012040984A1

WO2012040984A1 - Endoscopic surgical cutting stapler with replaceable staple cartridge

Info

Publication number: WO2012040984A1
Application number: PCT/CN2010/079796
Authority: WO
Inventors: 张祖仁; 袁栋坤; 蒋震宇; 吉荣; 张奕奕; 徐维华; 虞国安; 戴晓东
Original assignee: 常州市康迪医用吻合器有限公司; 上海创亿医疗器械技术有限公司
Priority date: 2010-09-28
Filing date: 2010-12-15
Publication date: 2012-04-05
Also published as: CN101966093B; CN101966093A

Abstract

An endoscopic surgical cutting stapler with a replaceable staple cartridge (9) includes a stapler body (5), an end effector (2), an extension tube(4) connecting the stapler body (5) and the end effector (2), and an operating mechanism (6) controlling the action of the end effector (2). The end effector (2) consists of an effector frame (7), a slide bar (8), a staple cartridge (9), and an anvil (10). The staple cartridge (9) consists of a staple cartridge housing (11), staple pushers (12), a staple pushing sled (13) and staples (14). Staple slots (15), staple pushing apertures (16), a sled slot (17), and a knife pushing slot (18) are provided in the staple cartridge housing (11). A cutting knife (21) is installed in the knife pushing slot (18) of the staple cartridge housing (11). An arcuate slide slot (23) is provided on a proximal end of the staple cartridge housing (11), and an arcuate bump (25) is provided on the cutting knife (21). Before use of the staple cartridge (9), the arcuate bump (25) of the cutting knife (21) is inserted in the arcuate slide slot (23) of the staple cartridge housing (11) to position the knife blade (29) of the cutting knife (21) in the knife pushing slot (18) of the staple cartridge housing (11). In use of the staple cartridge (9), the slide bar (8) is moved from the proximal end to the distal end of the staple cartridge (9). Firstly the slide bar (8) pushes the cutting knife (21) and pushes the arcuate bump (25) of the cutting knife (21) out of the arcuate slide slot (23) of the staple cartridge housing (11) so that the knife blade (29) of the cutting knife (21) protrudes out of the knife pushing slot (18) of the staple cartridge housing (11), and then the slide bar (8) pushes the cutting knife (21) to move in the knife pushing slot (18) of the staple cartridge housing (ll).When the staple pushing sled (13) pushes the staple pushers (12) with its sloped surface to move in the staple pushing apertures (16), the staples (14) are pushed out of the staple slots (15).

Description

Endoscopic surgical cutting stapler with replaceable staple cartridge

Technical field

The present invention relates to a laparoscopic surgical stapler for use in thoracoscopic surgery, and more particularly to a laparoscopic surgical stapler with a replaceable staple cartridge, which is in the field of medical devices. Background technique

In laparoscopic surgery, the endoscopic sclerotomy stapler is usually used for the anastomosis of the esophagus, stomach, duodenum, small intestine, colon, rectum, appendix, gallbladder, pancreas and spleen in the digestive tract. It is used for cutting and anastomosis of the lungs and trachea in the respiratory tract. It is also used for cutting and anastomosis of the bladder and uterus in the genitourinary system, which can reduce the operation time and improve the quality of surgery.

The existing endoscopic surgical cutting staplers have various endoscopic singular cutting staplers as described in U.S. Patent Nos. 20080308602, 20090206124 and 20090206123. When using the laparoscopic cutting stapler, the execution head is first inserted into the T body cavity through a puncture needle having an inner diameter of 12 mm to 13 mm, and then the head axial rotation and/or joint rotation is controlled to align the tissue to be cut. The clamping mechanism can be operated to push the slide bar to clamp the anastomotic tissue to be cut between the anvil of the execution head and the staple cartridge. Then operate the firing mechanism, and then push the slider: the two ends of the slider are respectively inserted into the anvil of the execution head and the two ends of the staple cartridge, so as to achieve the required clamping thickness between the anvil and the staple cartridge; The skateboard pushes the pusher block, and pushes the staple from the staple cartridge through the stapled forming groove that is clamped to the anastomotic tissue to be cut directly to the anvil, so that the U-shaped staple is bent into a B shape, and the operation of the tissue anastomosis is achieved. Purpose; The cutting knife on the slide bar cuts the clamped tissue to be cut to achieve the purpose of cutting the tissue. After the cutting and anastomosis operation is completed, the clamping mechanism is operated to loosen the cut anastomosis tissue, so as to exit the endoscope and the cutting stapler. Endoscopic surgical cutting The clamping mechanism and firing mechanism of the stapler can also utilize other operating mechanisms. The operating mechanism can also have an indicating mechanism. Various operating mechanisms, such as the clamping mechanism and the firing mechanism of the laparoscopic surgical stapler, may be manual laparoscopic surgical stapler as in U.S. Patent Nos. 20080308602 and 20090206123, or may be electric mirrors such as U.S. Patents 20090090763 and 20090095790. The surgical cutting stapler can also be a fluid-driven endoscopic cutting stapler as disclosed in U.S. Patents 2,070,125,826 and 20080029577.

The existing endoscopic surgical cutting stapler comprises the following components: an anastomosis body, an execution head, an extension tube connecting the stapler body and the execution head, and an operating mechanism for controlling the action of the execution head. The actuator head consists of an actuator, a carriage, a staple cartridge and an anvil. Install the slide bar, staple cartridge and anvil on the actuator. The staple cartridge consists of a staple cartridge shell, a pusher block, a pusher slide, and a staple. There are nail slots, push nail holes and pusher slots in the cartridge housing. The staples are mounted in the staple slots. The pusher block is mounted in the push pin hole. The pusher block can be moved within the pusher hole to push the staple out of the staple slot. The pusher skateboard pushes the staples out of the staple slots by pushing the pusher blocks in the pusher holes. The staple is U-shaped and consists of two staple legs, a nail beam and two nail tips. One end of the nail leg is respectively connected with the nail beam, and the other end is a nail tip. Staples can be made of stainless steel wire, silk, Titanium wire or other wire with similar properties. The two staple legs of the staple are inserted into the staple groove. The staple beam of the staple sits on the upper side of the push block. The end face of the anvil has a staple forming groove corresponding to the position of the staple in the staple cartridge and a cutting groove corresponding to the position of the pusher groove in the staple cartridge. The nail groove and the push nail hole of the staple cartridge shell are arranged on both sides of the pusher groove. The staple forming grooves of the anvil are arranged on both sides of the cutting groove of the anvil. To be arranged in two rows, three rows, four rows, five rows, six rows, seven rows or eight rows. There is a cutting knife on the slide bar that can be moved in the cutting groove of the staple cartridge and the cutting groove of the anvil.

After each scalpel surgical cutting stapler completes the cutting and anastomosis operation, the staple has been pushed out of the staple cartridge, and a new staple cartridge with staples is required to perform the next cutting and anastomosis operation. The laparoscopic surgical stapler as described in U.S. Patent No. 20090206123, after completion of the cutting and anastomosis operation, replaces the disposable loading device for reuse. The disposable loading device includes a new actuator head and end connector for a staple cartridge. The unsatisfactory aspect of this type of laparoscopic surgical stapler is that several disposable loading devices need to be replaced during the same procedure in the same patient, since the disposable loading device includes an actuator head and end connector, The total cost is quite high. Another unsatisfactory aspect of this type of laparoscopic surgical stapler is that, as described in U.S. Patent No. 20090206123, the end connector of the disposable loading device may inadvertently cut the stapler from the endoscope. The long body disengages, causing the laparoscopic surgical cutting stapler to malfunction or be inoperable, and therefore, US Patent No. 20090206123 proposes that the disposable loading device can be mounted to the elongated body along the elongated body axis in a direction that is neither collinear nor parallel. It is also proposed to add a thread, or a detent mechanism, or a snap-fit device to the end connector of the disposable loading device to ensure that the disposable loading device can be securely attached to the elongated body of the endoscopic surgical cutting stapler. Since the diameter of the elongated body of the endoscopic cutting stapler is 12 mm to 13 mm in laparoscopic surgery, the end connector of such a complicated disposable loading device is difficult and difficult to process and assemble. It is guaranteed that it is troublesome to repeatedly install and disassemble during the operation, and the total cost is high. Therefore, the disposable loading device of the endoscopic surgical cutting kisser needs to be improved.

It can be clearly seen from the above that different types of endoscopic surgical cutting staplers have been designed, and the development of new endoscopic surgical cutting staplers continues, so that the endoscopic surgical cutting anastomosis is widely used in the world every year. The device is further improved to make it more convenient to use, more convenient to assemble and disassemble, and lower in surgical cost.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies of the prior art and to provide a laparoscopic surgical stapler with a replaceable staple cartridge that is convenient to use and convenient for loading and unloading a staple cartridge.

The technical solution for achieving the above object is: a laparoscopic surgical cutting stapler with a replaceable staple cartridge, comprising an anastomosis body, an execution head, an extension tube connecting the anastomosis body and the execution head, and an operating mechanism for controlling the execution of the head movement The execution head is composed of an actuator, a slider, a staple cartridge and an anvil, and the staple cartridge is pushed by the staple cartridge shell. The nail block, the push nail slide plate and the staple nail are composed. The nail cartridge shell has a nail groove, a push nail hole, a slide plate groove and a push knife groove. The staple is installed in the nail groove, and the push nail block is installed in the push nail hole, and the push nail is pushed. The sliding plate is installed in the sliding slot, and the nail groove and the pushing nail hole of the nail housing are arranged on two sides of the pushing knife groove, and the end surface of the anvil has an anastomotic forming groove and a nail storage corresponding to the position of the staple in the staple cartridge a cutting slot corresponding to the position of the pushing slot in the shell, a cutting knife installed in the pushing slot of the nail housing, a curved chute at the proximal end of the nail housing, and an arc-shaped lug on the cutting knife, the nail cartridge Before use, the arcuate projection of the cutting blade is inserted into the arc chute of the cartridge housing such that the cutting edge of the cutting blade is located in the pusher slot of the cartridge housing; when the cartridge is in use, the slider is from the nail The proximal end of the cartridge moves toward the distal end. First, the slider pushes the cutter, and the arcuate projection of the cutter is pushed out from the arc chute of the cartridge casing, so that the blade of the cutter is pushed from the cartridge casing. The sipe is extended, and then the slider pushes the cutter to move in the pusher slot of the staple cartridge shell, and the pusher skateboard pushes against the inclined plane The staple pushing block bore when the pusher moves anastomotic staple Release butoxy tank.

An arcuate chute at the proximal end of the cartridge housing is located on either side of the proximal end of the cartridge housing, and the arcuate projections of the cutter are located on either side of the cutter.

The arcuate chute of the cartridge housing has an elastic stop therein; the resilient stopper causes the arcuate projection of the cutter to be constrained within the arcuate chute of the cartridge housing.

The cutting blade has a groove at a distal end thereof, and a protruding block is formed at a proximal end of the pusher blade, and a groove of the cutting blade is embedded in the protrusion of the pusher slide to form a partial pivotal connection.

An insert is embedded in the proximal end of the staple cartridge housing, and the curved chute is located in the insert.

A bump is located at the distal end of the slide bar, and the bump brings the cutter back to the proximal end of the staple cartridge as the slide bar moves from the distal end of the staple cartridge toward the proximal end.

The curved chute has an elastic baffle therein, and the elastic baffle divides the arc chute into a proximal arc chute and a distal arc chute; before the use, the cutting knives of the cutting knives The curved protrusions are respectively inserted into the proximal curved chutes of the inserts, so that the cutting edge of the cutting knife is located in the pushing groove of the nail housing, and the elastic baffle in the curved sliding groove of the insert makes the cutting knife The curved bump is constrained in the proximal curved chute of the insert; when the staple cartridge is in use, the slide rod moves from the proximal end of the staple cartridge to the distal end, first pushing the cutter, in the cutter The elastic baffle in the arc chute is elastically deformed by the pressing of the arcuate lug, so that the arcuate lug of the cutting blade is pushed out from the proximal arc chute of the insert, so that the cutting edge of the cutting blade Extending from the pusher slot of the staple cartridge shell, and then the slide bar pushes the cutter to move in the pusher slot of the staple cartridge shell, and the elastic baffle rebounds to seal the proximal curved chute of the insert; When the rod moves from the distal end of the staple cartridge to the proximal end, the slide rod first brings the cutter back to the proximal end of the staple cartridge, and then the arc of the cutter The elastic baffle in the arc chute is elastically deformed by the pressing of the bump, so that the arcuate lug of the cutting blade enters the arcuate chute of the distal end of the insert, so that the cutting edge of the cutting knife is located in the nail cartridge shell In the pusher slot, at the same time, the elastic baffle rebound in the arc chute restrains the arcuate lug of the cutter in the arcuate chute of the distal end of the insert.

Cutting when the arcuate projection of the cutting blade is constrained within the arcuate chute of the distal end of the cartridge housing The angle of inclination of the knife is less than 45. .

The distal end of the cartridge housing has an elastic hook and a side protrusion, the distal end of the actuator has a side groove, and the elastic hook at the distal end of the cartridge shell and the distal end of the actuator The bottom part of the assembly constitutes a detachable snap structure; when the staple cartridge is mounted on the execution frame, the side projections at the distal end of the staple cartridge housing are inserted into the side grooves at the distal end of the execution frame, and the binding staple cartridges are executed along the edge The movement of the frame in the front-rear direction, the elastic hook at the distal end of the nail cartridge shell is elastically deformed and then snapped to the bottom of the distal end of the execution frame to restrain the movement of the staple cartridge along the vertical direction of the execution frame; when the staple cartridge is removed from the execution frame When the side protrusion at the distal end of the nail cartridge shell is withdrawn from the side groove at the distal end of the actuator frame, the elastic hook at the distal end of the nail cartridge shell is elastically deformed and is separated from the bottom portion of the distal end of the execution frame, so that the nail The warehouse is separated from the execution rack.

The bottom of the cartridge housing is mounted with a bottom cover, and the two sides of the bottom cover are respectively engaged on both sides of the cartridge housing.

After using the above technical solution, a cutting knife with a bump is installed in the pusher slot of the nail cartridge shell, and a curved chute is arranged at the proximal end of the nail cartridge shell, and the elastic hook and the execution frame at the distal end of the nail cartridge shell The bottom portion at the distal end constitutes a detachable snap structure. When the cartridge housing is mounted to the mounting frame, the resilient hook at the distal end of the cartridge housing is elastically deformed and snapped to the bottom of the distal end of the actuator to restrain the movement of the cartridge housing in the up and down direction of the actuator. When the cartridge housing is removed from the actuator, the resilient hook at the distal end of the cartridge housing is resiliently deformed and disengaged from the bottom of the distal end of the actuator to disengage the cartridge housing from the actuator. Before the staple cartridge is used, the projection of the cutter is restrained in the arc chute of the cartridge housing, and the cutting edge of the cutter is located in the pusher groove of the cartridge housing. When the staple cartridge is in use, the slide bar pushes the cutter to extend the blade edge of the cutter from the pusher slot of the staple cartridge housing. After the staple cartridge is in use, the slide bar brings the cutter back to cause the projection of the cutter to be re-constrained in the arc chute of the cartridge casing, and the blade edge of the cutter is relocated in the pusher slot of the cartridge casing. At this time, the cutting angle of the cutter is less than 45. It cannot be moved from the proximal end of the staple cartridge to the distal end under the push of the slide bar, preventing the used staple cartridge from being used again. Therefore, only the staple cartridge with the cutting knife can be replaced on the execution head of the same endoscopic surgical cutting stapler, and the same endoscopic surgical cutting stapler can be used to perform multiple endoscopic laparoscopic surgery, so that the use It is more convenient and safer, more convenient when loading and unloading staples, and lower operating costs.

DRAWINGS

1 is a perspective view showing the appearance of a joint between a staple cartridge and an anvil when the joint of the endoscopic surgical cutting stapler with a replaceable staple cartridge is opened;

Figure 2 is a perspective view showing the appearance when the joint between the staple cartridge and the anvil is rotated when the joint of the endoscopic surgical cutting stapler of Figure 1 is rotated;

Figure 3 is an enlarged perspective view showing the opening of the staple cartridge, the extension tube, the joint and the operating mechanism of the endoscopic surgical cutting stapler of Figure 1 after the removal of the staple cartridge and the anvil;

Figure 4 is an enlarged perspective view showing the staple body, the extension tube, the joint and the operating mechanism of the endoscopic surgical cutting stapler of Figure 1 when the staple cartridge and the anvil of the head are opened; Figure 5 is a perspective view showing an enlarged appearance when the collar of the actuator of Figure 4 is removed and the staple cartridge and the anvil are opened;

Figure 6 is an enlarged perspective view showing the staple body, the extension tube, the joint and the operating mechanism of the endoscopic surgical cutting stapler of Figure 1 when the staple cartridge and the anvil of the head are closed;

Figure 7 is an enlarged perspective view showing the closed state between the staple cartridge and the anvil after the collar of the actuator of Figure 6 is removed;

Figure 8 is an enlarged perspective view showing the back side of the execution head of the endoscopic cutting stapler of Figure 1;

Figure 9 is an enlarged perspective view showing the staple cartridge of the laparoscopic cutting stapler of Figure 1 taken out;

Figure 10 is an enlarged perspective view showing the bottom cover of the staple cartridge of the laparoscopic cutting stapler of Figure 1 removed;

Figure 11 is a perspective view showing an enlarged appearance of the cartridge case of Figure 10;

Figure 12 is an enlarged perspective view showing the slider in the actuator of Figure 1 before pushing the cutter, the pusher block, the pusher slide and the staple;

Figure 13 is a perspective view showing an enlarged appearance of the slide bar in the actuator of Figure 1 when pushing the cutter, the pusher block, the pusher slide and the staple;

Figure 14 is a perspective view showing an enlarged appearance of the anvil of Figure 1;

Figure 15 is an enlarged perspective view showing the actuator of Figure 1;

Figure 16 is an exploded view showing the cutting blade and the insert assembly with the curved chute when the cutting edge of the cutting blade in the staple cartridge of Figure 1 is located in the pusher groove of the staple cartridge housing;

Figure 17 is an exploded view showing the cutting blade and the insert assembly with the curved chute when the cutting edge of the cutting blade in the staple cartridge of Figure 1 protrudes from the pusher groove of the staple cartridge housing;

Figure 18 is a block diagram showing the cutting blade and another curved chute with an elastic baffle when the cutting edge of the cutting blade in the staple cartridge is located in the pusher groove of the staple cartridge housing prior to use. A magnified view of the component;

Figure 19 is a view showing the cutting blade of the cutting blade of Figure 1 in use, and the cutting blade of the cutting blade in the staple cartridge protrudes from the pusher groove of the cartridge housing, and the other has a curved chute with an elastic baffle. An enlarged perspective view of the insert assembly;

Figure 20 is a view showing the cutting blade and another curved chute with an elastic baffle when the cutting edge of the cutting blade in the staple cartridge is located in the pusher groove of the staple cartridge case after the cutting and stapling operation of the staple cartridge of Figure 1 is completed. A magnified perspective view of the inlay assembly.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. As shown in FIGS. 1 and 2, the endoscopic sigma cutting stapler is composed of the executive head 2, the joint 3, the extension tube 4, the stapler body 5, and the operating mechanism 6. The operating mechanism 6 is located at the stapler body 5, and performs the operation of the head 2 through the lumen of the extension tube 4 (the partial operating mechanism 6 in the staple body 5 and the extension tube 4 is not shown, and can refer to the US patent cited in the present specification) . The execution head 2, the joint 3, the extension tube 4, and the stapler body 5 are sequentially connected in sequence. As shown in FIGS. 4 to 13, the execution head 2 is composed of an actuator 7, a slide bar 8, a magazine 9 and an anvil 10. A slide bar 8, a magazine 9 and an anvil 10 are mounted on the actuator 7. The staple cartridge 9 is composed of a staple cartridge housing 11, a pusher block 12, a pusher slide 13 and a staple 14. The staple cartridge housing 11 has a staple groove 15, a push pin hole 16, a slide groove 17, and a pusher groove 18. The staples 14 are mounted within the staple slots 15. The pusher block 12 is mounted within the push pin hole 16. The pusher slide 13 is mounted in the slide groove 17. The staple groove 15 and the push pin hole 16 of the staple cartridge case 11 are arranged in three rows on both sides of the pusher groove 18. The end surface of the anvil 10 has a staple forming groove 19 corresponding to the position of the staple 14 in the staple cartridge 9, and a cutting groove 20 corresponding to the position of the pusher groove 18 in the staple cartridge housing 11. The staple forming grooves 19 of the anvil 10 are arranged in three rows on each side of the cutting groove 20 of the anvil 10. The anvil 10 is pivotally coupled to the actuator 7.

As shown in Figs. 4 to 13, a cutter blade 21 is mounted in the pusher groove 18 of the magazine casing 11. When the slider 8 is moved from the proximal end of the cartridge housing 11 to the distal end, the slider 8 pushes the cutter blade 21 and the pusher slider 13 to move within the pusher groove 18 of the cartridge housing 11. The pusher slide 13 pushes the pusher block 12 through the bevel to push the staple 14 out of the staple groove 15 as it moves within the pusher hole 16.

As shown in Figures 4 to 17, the insert 22 is embedded at the proximal end of the cartridge housing 11. The insert 22 has an arcuate chute 23 therein. The arc chute 23 has a stop 24 therein. The cutting blade 21 has an arcuate projection 25 having a recess 26 at the distal end thereof. A bump 27 is present at the proximal end of the pusher slide 13. A stopper 28 is formed in the sliding groove 17 of the cartridge housing 11. Before the staple cartridge 9 is used, when the arcuate projection 25 of the cutter blade 21 is inserted into the arcuate chute 23 of the insert 22 of the cartridge housing 11, the groove 26 of the cutter blade 21 is embedded in the projection of the pusher slide 13 When the partial pivotal connection is formed 27, the stop 24 in the arcuate chute 23 causes the arcuate projection 25 of the cutting blade 21 to be constrained within the arcuate chute 23 of the insert 22 of the cartridge housing 11, the staple cartridge shell The stopper 28 in the slide groove 17 of the 11 causes the pusher slide 13 to be approximately 1⁄2 in the slide groove 17 of the staple cartridge housing 11, so that the cutter 21 and the pusher slide 13 are restrained in the cartridge housing 11, at this time The cutting angle of the cutting blade 21 is greater than 45. And the cutting edge 29 of the cutting blade 21 is placed in the pusher groove 18 of the cartridge housing 11. When the staple cartridge 9 is in use, when the slider 8 is moved from the proximal end of the cartridge housing 11 to the distal end, the slider 8 first pushes the cutter blade 21, and the pressing action of the curved projection 25 of the cutter blade 21 is performed. The stopper 24 in the lower curved chute 23 is elastically deformed and disengaged so that the arcuate projection 25 of the cutting blade 21 is pushed out from the arcuate chute 23 of the cartridge casing 11, and at the same time, the cutter 21 is The groove 26 is pivoted about the projection 27 of the pusher slide 13 such that the cutting edge 29 of the cutting blade 21 projects from the pusher groove 18 of the cartridge housing 11, and then the slider 8 pushes the cutter 21 to push the pusher The slide plate 13 causes the pusher slide 13 to elastically deform and disengage from the restraint of the stopper 28 in the slide groove 17, so that the slide bar 8 pushes the cutter 21 and the pusher slide 13 from the proximal end to the distal end of the staple cartridge case 11 mobile. As shown in FIGS. 10 to 17, a slider 30 is provided at the distal end of the slider 8. When the slider 8 is moved from the distal end of the cartridge housing 11 toward the proximal end, the projection 30 at the distal end of the slider 8 first brings the cutting blade 21 back to the proximal end of the cartridge housing 11, and then at the cutting blade The stopper 24 in the arcuate chute 23 is elastically deformed by the pressing of the arcuate projection 25 of 21 so that the arcuate projection 25 of the cutting blade 21 enters the arc chute of the insert 22 of the cartridge casing 11. In the depth of 23, the cutting edge 29 of the cutting blade 21 is placed in the pusher groove 18 of the cartridge housing 11.

As shown in Figs. 3 to 8, Fig. 11, and Fig. 15, the distal end of the magazine casing 11 has elastic hooks 31 and side projections 32. There is a side groove 33 at the distal end of the actuator 7. The elastic hook 31 at the distal end of the cartridge housing 11 and the bottom portion 34 at the distal end of the actuator 7 constitute a detachable snap structure. When the staple cartridge 9 is mounted to the actuator 7, the side projections 32 at the distal end of the cartridge housing 11 are inserted into the side grooves 33 at the distal end of the actuator 7, and the staple cartridges 9 are restrained in the front-rear direction of the actuator 7. At the same time, the elastic hook 31 at the distal end of the cartridge casing 11 is elastically deformed and then snapped to the bottom portion 34 at the distal end of the execution frame 7, and the movement of the staple cartridge 9 in the up and down direction of the actuator 7 is restrained. When the staple cartridge 9 is detached from the actuator 7, the side projections 32 at the distal end of the cartridge housing 11 are withdrawn from the side recesses 33 at the distal end of the actuator 7 while the distal end of the cartridge housing 11 is The elastic hook 31 is elastically deformed and disengages from the bottom portion 34 at the distal end of the actuator frame 7, so that the staple cartridge 9 is disengaged from the actuator 7. As shown in Fig. 9, a bottom cover 35 is attached to the bottom of the magazine casing 11. Both sides of the bottom cover 35 are respectively engaged on both sides of the magazine casing 11.

18 to 20, another insert 22 embedded in the proximal end of the cartridge housing 11 of the endoscopic surgical cutting stapler of the present invention has a curved chute 23 in the insert 22, the insert The arcuate chute 23 of the 22 has an elastic baffle 36 therein. The resilient baffle 36 divides the arcuate chute 23 of the insert 22 into a proximal arcuate chute 23-1 and a distal arcuate chute 23-2. Prior to use, the curved projections 25 of the cutting blade 21 are inserted into the proximal curved chute 23-1 of the insert 22 such that the cutting edge 29 of the cutting blade 21 is located in the pusher slot 18 of the cartridge housing 11. Inside, the elastic baffle 36 in the arcuate chute 23 of the insert 22 causes the arcuate projection 25 of the cutting blade 21 to be approximately; the proximal arcuate chute 23-1 of the insert 22, at this time, cut The angle of inclination of the knife 21 is greater than 45. . When the staple cartridge 9 is in use, the slide bar 8 moves from the proximal end of the staple cartridge 9 to the distal end, first pushing the cutter blade 21, and the arcuate chute 23 under the action of the arcuate projection 25 of the cutter blade 21 The inner resilient baffle 36 is elastically deformed so that the arcuate projection 25 of the cutting blade 21 is pushed out from the proximal arcuate chute 23-1 of the insert 22, causing the cutting edge 29 of the cutting blade 21 to be removed from the cartridge housing 11. The pusher slot 18 extends and then pushes the cutter 21 to move within the pusher slot 18 of the cartridge housing 11, while the resilient flap 36 rebounds to seal the proximal curved slot 23-1 of the insert 22. . After the cutting and stapling operation is completed, the slide bar 8 moves from the distal end of the staple cartridge 9 toward the proximal end, and the bump 30 at the distal end of the slide bar 8 first brings the cutting blade 21 back to the proximal end of the staple cartridge 9, and then The elastic baffle 36 in the arcuate chute 23 is elastically deformed by the pressing of the arcuate projection 25 of the cutting blade 21 so that the arcuate projection 25 of the cutting blade 21 enters the distal curved chute of the insert 22. In 23-2, the cutting edge 29 of the cutting blade 21 is placed in the pusher groove 18 of the cartridge housing 11, while the elastic baffle 36 in the arcuate chute 23 rebounds to constrain the arcuate projection 25 of the cutting blade 21 to The distal end of the insert 22 is in the arcuate chute 23-2. When the arc of the cutter 21 When the shaped lug 25 is constrained within the distal arcuate chute 23-2 of the insert 22, the angle of inclination of the cutting blade 21 is less than 45.

The used staple cartridge 9 has no staples. 14. The laparoscopic surgery that performs the cutting anastomosis again will cause the operation to fail. It must be replaced with a new staple cartridge with a cutting knife before it can be used again. Since the cutting edge of the cutting blade 21 is less than 45° when the curved projection 25 of the cutting blade 21 is about 1⁄2 in the distal curved chute 23-2 of the insert 22 of the cartridge housing 11, when used While the staple cartridge 9 is still on the rack 7, if the endoscopic surgical cutting stapler 1 performs the endoscopic laparoscopic surgery again, moving the slide bar 8 from the proximal end of the staple cartridge 9 to the distal end, the slide bar 8 pushing the cutting blade 21 such that the curved projection 25 of the cutting blade 21 is on the distal curved chute 23-2 of the insert 22 of the cartridge housing 11, preventing the slider 8 from further moving from the proximal end of the staple cartridge 9 The distal end moves to prevent the surgical failure caused by the used staple cartridge 9 being reused, and the user of the laparoscopic surgical cutting stapler should be promptly replaced with a new staple cartridge.

Compared with the existing various endoscopic surgical cutting staplers, the endoscopic surgical cutting stapler of the present invention with a replaceable staple cartridge can be replaced only with a new one on the execution head of the same endoscopic surgical cutting stapler The staple cartridge of the staple and the cutting knife can be used to perform multiple endoscopic laparoscopic surgery using the same endoscopic sigma cutting stapler, which makes the use more convenient and safe, and is more convenient when loading and unloading the nail cartridge. Lower.

The present invention has been described in terms of a typical preferred embodiment of the present invention, and it is possible to make some changes to the above-described structure without departing from the spirit and scope of the invention. The invention is not limited or limited to the specific details set forth herein, and any modifications or variations that are obvious to those skilled in the art are

It should be added that the term "proximal" in this context refers to the end of the endoscopic cutting stapler near the operator, and the term "distal" refers to the endoscopic cutting stapler away from the operator. One end.

Claims

Claim

1. A laparoscopic surgical cutting stapler with a replaceable staple cartridge, comprising an anastomotic body (5), an executive head (2), an anastomotic body (5), and an extension tube for the execution head (2) (4) ), an operating mechanism (6) that controls the execution of the head (2), and an actuator (2) consisting of an actuator (7), a slider (8), a staple cartridge (9), and an anvil (10), a staple cartridge ( 9) consisting of a staple cartridge shell (11), a pusher block (12), a pusher slide (13) and a staple (14), the staple cartridge shell (11) having a nail groove (15) and a push nail hole (16) a slide groove (17) and a pusher groove (18), the staple (14) is installed in the nail groove (15), and the push block (12) is installed in the push hole (16) The pusher slide plate (13) is installed in the slide groove (17), and the nail groove (15) and the push pin hole (16) of the staple cartridge case (11) are arranged on both sides of the pusher groove (18) The end surface of the anvil (10) has an anastomosis forming groove corresponding to the position of the staple (14) in the staple cartridge (9)

(19) and a cutting groove (20) corresponding to the position of the pusher groove (18) in the magazine casing (11), characterized in that: a cutter is installed in the pusher groove (18) of the magazine casing (11) (21), the proximal end of the staple cartridge shell (11) has a curved chute (23), and the cutting blade (21) has an arcuate projection (25), and the staple cartridge (9) is used before use. An arcuate projection (25) of the cutting blade (21) is inserted into the arcuate chute (23) of the cartridge housing (11) such that the cutting edge (29) of the cutting blade (21) is located in the cartridge housing (11) inside the pusher slot (18); when the staple cartridge (9) is in use, the slider (8) moves from the proximal end of the staple cartridge (9) to the distal end, first the slider (8) Pushing the cutting blade (21) and pushing the curved projection (25) of the cutting blade (21) out of the curved chute (23) of the cartridge housing (11) to make the cutting edge of the cutting blade (21) ) projecting from the pusher slot (18) of the cartridge housing (11), and then the slider (8) pushes the cutter knife (21) into the pusher slot of the cartridge housing (11)

(18) Moving inside, the pusher slide (13) pushes the staple (14) out of the staple groove (15) by pushing the pusher block (12) in the pusher hole (16).

2. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1, wherein: the curved chute (23) at the proximal end of the staple cartridge shell (11) is located in the staple cartridge shell (11) On both sides of the proximal end, the arcuate projections (25) of the cutting blade (21) are located on both sides of the cutting blade (21).

3. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 2, wherein the curved chute (23) of the staple cartridge shell (11) has an elastic stop (24) The elastic stop (24) causes the arcuate projection (25) of the cutter (21) to be approximately; 1⁄2 within the arcuate chute (23) of the staple cartridge shell (11).

4. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1, wherein: the cutting blade (21) has a groove (26) at a distal end thereof, and the pusher skateboard At the proximal end of (13) there is a bump (27), and the groove (26) of the cutting blade (21) is embedded in the projection (27) of the pusher slide (13) to form a partial pivotal connection.

5. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1, wherein: the insert (22) is embedded in the proximal end of the staple cartridge shell, and is curved and slippery. Slot (23) is located in the insert (22) Inside.

6. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1 or 3 or 4, wherein: the slider (8) has a projection (30) at the distal end thereof, When the slider (8) moves from the distal end of the staple cartridge (11) to the proximal end, the bump (30) brings the cutting blade (21) back to the staple cartridge

At the proximal end of (11).

7. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1, wherein: the curved chute (23) has an elastic baffle (36), and the elastic baffle (36) Separating the curved chute (23) into a proximal arc chute (23-1) and a distal arc chute (23-2); the cutting knives (21) before use The arcuate projections (25) are respectively inserted into the proximal arcuate chutes (23-1) of the inserts (22) such that the cutting edges (29) of the cutting blades (21) are located in the staple cartridge shells (11). Pusher slot

(18) Inside, the elastic baffle (36) in the curved chute (23) of the insert (22) causes the curved lug (25) of the cutting blade (21) to be constrained to the vicinity of the insert (22) Inside the curved chute (23-1); the staple cartridge (9), in use, moves from the proximal end of the staple cartridge (9) to the distal end, first pushing the cutter (21) The elastic baffle (36) in the arc chute (23) is elastically deformed under the action of the arcuate projections (25) of the cutting blade (21) so as to be curved convex of the cutting blade (21) The block (25) is pushed out from the proximal curved chute (23-1) of the insert (22), causing the cutting edge (29) of the cutting blade (21) to be pushed from the pusher groove of the staple cartridge casing (11) (18) ) extends inside, and then the slider (8) pushes the cutter (21) to move within the pusher slot (18) of the cartridge housing (11) while the resilient flap (36) rebounds to insert the insert (22) The proximal curved chute ( 23-1 ) is sealed; when the sliding rod ( 8 ) moves from the distal end of the staple cartridge ( 9 ) to the proximal end, the sliding rod ( 8 ) first takes the cutting blade ( 21 ) Pressing the proximal end of the staple cartridge (9) and then pressing under the arcuate projections (25) of the cutting blade (21) The elastic baffle (36) in the curved chute (23) is elastically deformed so that the arcuate projection (25) of the cutting blade (21) enters the distal curved chute (23-2) of the insert, The cutting edge (29) of the cutting blade (21) is placed in the pusher groove (18) of the cartridge housing (11), while the elastic baffle (36) in the curved chute (23) rebounds to cut the knife (21) The arcuate projections (25) are constrained within the distal arcuate chute (23-2) of the insert (22).

8. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 8, wherein: when the arcuate projection (25) of the cutting blade (21) is about; When the distal end of the casing (11) is in the curved chute (23-2), the angle of inclination of the cutter is less than 45. .

9. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1, wherein: the distal end of the cartridge housing (11) has an elastic hook (31) and a side projection (32), the distal end of the actuator frame (7) has a side groove (33), and the elastic hook at the distal end of the nail cartridge shell (11)

(31) forming a detachable snap structure with the bottom at the distal end of the actuator (7); when mounting the staple cartridge (9) to the actuator (7), the distal end of the staple cartridge (11) The side lug (33) is inserted into the side groove (33) at the distal end of the actuator (7) to restrain the movement of the staple cartridge in the front-rear direction of the actuator (7), and the cartridge housing (11) The elastic hook (31) at the distal end is elastically deformed and then snapped to the bottom of the end of the actuator (7) to restrain the movement of the staple cartridge along the upper and lower directions of the actuator (7); when the staple cartridge (9) ) is removed from the actuator (7), and the elastic hook (31) at the distal end of the cartridge housing (n) is elastically deformed and then disengaged from the bottom of the distal end of the actuator (7) to make the staple cartridge (8) Detach the actuator (7).

10. The endoscopic surgical cutting stapler with a replaceable staple cartridge according to claim 1, wherein: the bottom of the cartridge housing (11) is provided with a bottom cover (35), the bottom cover ( The two sides of the 35) are respectively snapped on both sides of the staple cartridge case (11).