CN1330277C - Surgical Stapler - Google Patents

Abstract

A surgical suture device is characterized in that: by adopting the pressing block structure, the safety mechanism has the safety function, the sound and position prompting function of finishing the sewing and the anti-opening function in the process of clamping the trigger handle; the scale on the indicating window is provided with more detailed indication of the position of the nail anvil by adopting an inclined structure, a straight structure and a lens amplifying structure; the special fast and slow screw transmission structure is adjusted by adopting a butterfly adjusting knob so as to obviously reduce the operation time and the operation force for adjusting the distance and the position between the nail anvil and the nail bin; the structure of the transparent nail bin and the nail bin opening with the inclined chute is adopted to prevent the stitching nail from missing; thereby being more convenient, more accurate, more labor-saving, more time-saving and safer in use, more convenient in manufacture and lower in production cost, and being particularly suitable for the disposable surgical suture instrument.

Description

Surgical Stapler

technical field

The present invention relates to a surgical stapler for replacing the freehand suturing operation with needles and threads in surgical operations, in particular to a tubular stapler, in particular to a linear stapler, in particular to a side stapler, and in particular It relates to a stapler for endoscopic surgery.

Background technique

Various surgical staplers are widely used in surgical operations to suture human digestive tract tissues, respiratory tract tissues and vascular tissues, which can reduce operation time and improve operation quality. They are usually used for end-to-end, end-to-side and side-to-side suture operations such as esophagus, stomach, duodenum, small intestine, colon and rectum in the digestive tract, or operations for forming channels or closing incisions such as hemorrhoidectomy and gastric pylorostomy. It is used in the suturing operation of lung and trachea in the respiratory tract and the suturing operation of vascular tissue, and it is also used in the endoscopic suturing operation of human digestive tract tissue, respiratory tract tissue and vascular tissue, especially for the organs and tissues that are difficult to expose and operate. Suture surgery. According to the shape of the human organ tissue to be sutured and the requirements of the surgical site, the head of the surgical stapler can be tubular, rectangular or other shapes, so there are tubular staplers, linear staplers, and side-to-side sutures. Instruments, endoscopic staplers and other various styles of surgical staplers.

The tubular stapler introduced in U.S. Patent 5,193,731 and 5,350,104, the linear stapler introduced in U.S. Patent 4,606,344 and 5,964,394, the side-to-side stapler introduced in U.S. Patent 5,586,711 and 5,680,983 and the endoscopic surgery suture introduced in U.S. Patent 5,814,055 Its components include: a stapler body, a staple cartridge installed on the head of the stapler body, an anvil installed at a position opposite to the staple cartridge, a nail pusher seat installed in the staple cartridge, which can be installed in the staple cartridge by pushing The staples released by the staple base are arranged on the end face of the anvil and the staple forming grooves corresponding to the positions of the staples in the staple bin are installed in the stapler body, and the anvil bar with the anvil on its head is installed. In the body of the stapler, the pusher rod with the pusher seat on the head is equipped with an adjustment indicator mechanism for adjusting the distance between the anvil and the staple bin, and pushes the pusher rod to move in the stapler body to push out the pusher nails in the stapler The firing mechanism of the seat and staples, other auxiliary parts installed in the stapler. According to needs, a nail pushing seat with a cutting knife and a knife anvil corresponding to the position of the cutting knife in the nail bin can be installed in the nail bin of the surgical stapler, and an anti-pushing seat in the nail bin can also be installed as needed. The insurance mechanism for nail holders and staples being pushed out by mistake. Staples can be made of stainless steel wire, tantalum wire, titanium wire or other metal wires with similar properties.

When using a surgical stapler, operate and adjust the indicating mechanism to achieve the required clamping thickness between the anvil and the staple cartridge, so as to clamp the tissue to be stitched between the anvil and the staple cartridge. After the tissue is clamped, the safety mechanism is opened, and the firing mechanism can be operated to push the pusher rod to move in the stapler body to push out the pusher seat and staples in the staple cartridge. When the staple is pushed out from the staple bin, it penetrates the clamped tissue to be sutured and reaches the forming groove on the anvil, so that the U-shaped staple is bent into a B-shape to achieve the purpose of suturing the tissue. For the operation that needs to cut the tissue to be sutured, the cutting knife can be pushed out to cut the clamped tissue to be sutured on the anvil in the anvil while operating the firing mechanism to push out the staple push seat and the staple in the staple bin. The sutured tissue can be cut with a scalpel. After the suturing operation is completed, the adjustment indicator mechanism is operated to increase the distance between the anvil and the staple bin, and loosen the sutured tissue so as to withdraw from the surgical stapler.

The insurance mechanism of surgical stapler has several styles at present. The surgical stapler introduced in U.S. Patent No. 4,319,576 adopts a slide block safety bolt that can slide back and forth on the stapler body. When the safety bolt moves forward and blocks the firing handle, it can prevent the firing handle from being fired; when the safety bolt moves backward and leaves the firing handle, the firing handle can be fired. The surgical stapler introduced in U.S. Patent No. 4,603,693 adopts a safety bolt that is pivotally connected with the stapler body. When the safety catch is closed to support the firing handle, the firing handle can be prevented from being fired; when the safety catch is opened to disengage the firing handle, the firing handle can be fired. The surgical stapler introduced in U.S. Patent No. 4,646,745 adopts a rotatable safety bolt that is enclosed within the stapler body pivot. When the safety catch is closed to support the firing handle, the firing handle can be prevented from being fired; when the safety catch is opened to disengage the firing handle, the firing handle can be fired. The unsatisfactory part of the safety mechanism of the above three styles is that after the tissue to be sutured is adjusted to the required clamping thickness and the safety plug is opened, if it is found that the tissue to be sutured is not properly placed, or the clamping position is found to be inappropriate , or other problems that need to be readjusted, it is necessary to loosen the tissue to be sutured so as to deal with the above problems. At this time, once the safety catch is forgotten to be closed again, the firing handle may be fired by mistake, thereby causing the suturing operation to fail. Therefore the insurance mechanism of surgical stapler also needs to be improved.

There are currently several styles of adjustment indicating mechanisms for surgical staplers. The surgical stapler introduced in US Patent No. 5,639,008 adopts the method of displaying the tail of the anvil rod in the groove at the tail of the adjustment knob to indicate that the anvil rod pulls the anvil to reach the position where the tissue to be sutured is clamped. The unsatisfactory part of the adjustment indicator mechanism of this style is that the groove at the tail of the adjustment knob changes direction constantly with the rotation of the adjustment knob, which affects observation. In the surgical staplers introduced in U.S. Patent Nos. 5,271,544 and 6,193,129, an anvil rod is used to drive a swinging pointer. The indicator window on the upper part is revealed, and the clamping thickness is enlarged to indicate the clamping thickness. The unsatisfactory part of the adjustment indicating mechanism of the above two styles is that when the anvil rod pulls the anvil and the anvil does not reach the position of clamping the tissue to be sutured, the adjusting indicating mechanism has no indication function, and the surgeon cannot know whether the anvil rod pulls the anvil or not. The concrete position that nail anvil arrives is not convenient for deciding to carry out the mode of operation of intermediate process. The surgical staplers introduced in U.S. Patent Nos. 5,193,731 and 5,271,544 adjust the position of the anvil by rotating the adjusting knob so that the nut in the inner hole of the adjusting knob drives the screw rod at the tail of the anvil rod to move back and forth. The unsatisfactory part of the adjustment indicator mechanism of this style is that the adjustment of the one-way full displacement of the nail anvil needs to be rotated about twenty circles, which takes a long time. The surgical stapler introduced in U.S. Patent No. 5,474,223 adopts four styles of pulling type linkage mechanism, thread adjustment type linkage mechanism, integral length and short pitch thread adjustment mechanism and split length and short pitch thread adjustment mechanism as the adjustment indicator mechanism. Among them, the unsatisfactory part of the pulling type linkage mechanism and the thread adjustment linkage mechanism as the adjustment indicator mechanism is that the structure is complex and the adjustment accuracy is poor; the integral long and short pitch thread adjustment mechanism is unsatisfactory as the adjustment indicator mechanism. The disadvantage is that the processing of the screw is difficult and the precision is poor, and the nut adopts a pin-type nut, which has a large contact stress. Due to the large force during the sewing operation, the pin may be offset and affect the self-locking effect; split long and short pitch threads The unsatisfactory part of the adjustment mechanism as an adjustment indicator mechanism is that the long pitch nut adopts a pin type nut, and the contact stress is very large, so the material requirements for the screw and the nut are very high. On the other hand, the switching mechanism for long and short pitch adjustment needs to be switched Action displacement, may slip or get stuck when switching. The surgical stapler introduced in U.S. Patent No. 5,639,008 adopts a butterfly-shaped adjustment knob to adjust the distance between the anvil and the staple bin, so that the surgeon can significantly reduce the operating force for adjusting the distance and position between the anvil and the staple bin. The unsatisfactory part of the adjustment indicator mechanism of this style is that the structure of the double-click hair handle takes up more positions, and it is difficult to add new functions in the stapler body. In the surgical stapler introduced in U.S. Patent No. 5,271,544, the firing mechanism consists of a movable firing handle and a fixed stapler body to form a pair of handles, which is convenient for adding new functions in the stapler body. The adjustment knob can only use the cylindrical adjustment knob to adjust the distance between the nail anvil and the staple bin. The unsatisfactory part of this type of adjustment indicator mechanism is that the operation force of the cylindrical adjustment knob is relatively large, and it is easy to slip. Therefore the adjustment indicating mechanism of surgical stapler also needs to be improved.

When assembling, inspecting and using a surgical stapler, it is often necessary to know whether there is a lack of staples in the staple cartridge. The staple cartridges of existing surgical staplers are all opaque, and it is difficult to observe clearly whether dozens of staples in the staple cartridge exist one by one. In addition, the staples in the staple cartridge may be lost during assembly, inspection, sterilization, transportation and use. At present, the known surgical staplers do not have a better solution.

From the above, it can be seen that a large number of surgical staplers of different styles have been designed now, and the development of new surgical staplers is still going on, so as to further improve the surgical staplers used in large quantities in the world every year , so that the operation is more convenient, labor-saving, reliable and correct, and the manufacturing is more convenient and the cost is lower.

Contents of the invention

The purpose of the present invention is to propose a surgical stapler, in addition to the insurance function, the safety mechanism also has the sound and position prompt function of suture completion and the anti-expansion function in the process of clamping the firing handle, so that the surgeon can use When it is difficult to clamp the firing handle, you can relax it without affecting the operation, and you can know in time when the suture has been completed.

Another object of the present invention is to propose a surgical stapler, realizing that the indication scale in the indication window of the adjustment indicator mechanism of the surgical stapler has a lens magnification structure and more detailed distance and distance between the nail anvil and the nail bin. Position indication, with special fast and slow screw transmission to adjust the distance and position between the anvil and the staple bin, using the butterfly-shaped adjustment knob to adjust the distance between the anvil and the staple bin, so that the surgeon can clearly The operating time and operating force for adjusting the distance and position between the anvil and the staple bin can be reduced, and the specific distance and position between the anvil and the staple bin can be understood more clearly, so as to facilitate correct selection of corresponding operations.

Another object of the present invention is to propose a surgical stapler, which can prevent the staples placed in the staple magazine from being stuck in the inclined chute in the staple magazine mouth, so as to prevent dozens of staples in the staple magazine from being produced and transported. and are lost during use.

Another object of the present invention is to propose a surgical stapler, the staple cartridge for placing the staples is made of transparent plastic, so that it is convenient to observe whether dozens of staples in the staple cartridge exist one by one.

At present, the known surgical stapler includes: a stapler body, a staple cartridge installed on the head of the stapler body, an anvil installed at a position opposite to the staple cartridge, a pusher seat installed in the staple cartridge, The staples that can be pushed out by the pusher seat are arranged on the end surface of the anvil and the staple forming grooves corresponding to the positions of the staples in the staple bin, and the anvil is installed in the stapler body and has an anvil on its head Rod, the nail pusher rod installed in the stapler body, the head of which is equipped with a nail pusher seat, the adjustment indicator mechanism for adjusting the distance between the nail anvil and the staple bin, and pushes the nail pusher rod to move in the stapler body to push out the staple bin The firing mechanism of the nail pusher seat and the staple, and other auxiliary parts installed in the stapler. A nail-push seat with a cutting knife and an anvil corresponding to the position of the cutting knife in the staple bin can be installed in the staple bin of the surgical stapler as required, and an anti-push seat in the staple bin can also be installed as required. The insurance mechanism for nail holders and staples being pushed out by mistake.

Task of the present invention is achieved through the following technical solutions:

Safety bolt and safety spring are arranged in the safety mechanism among the present invention. A firing handle and a firing spring are arranged in the firing mechanism. The firing handle is mounted on the stapler body and is pivotable. The firing handle pushes the pusher rod to move in the stapler body to push the pusher seat and staples in the staple bin. The firing spring always tends to open the firing handle. The safety catch is mounted on the stapler body and is pivotable. The safety bolt has an operating end, a control end, a stop block and a pressure block. The control end is used to support or break away from the firing handle, and the operating end is used to operate the rotation of the safety bolt. The safety spring tends to support the state of the firing handle with the control end of the safety bolt all the time. The firing handle has a flange. There are stop grooves on the nail anvil rod. When the distance between the anvil and the staple cartridge is greater than the position between the clamping thicknesses where the suturing operation can be performed, the anvil bar prevents the stopper on the safety catch from swinging, keeping the control end on the safety catch against the firing handle status. When the distance between the anvil and the staple cartridge is shifted from zero to the position between the clamping thickness that can perform the suturing operation, the stop groove on the anvil rod is located at the stop block on the safety bolt, and the safety bolt is pulled When the operating end of the safety bolt rotates, the stop block on the safety bolt can enter the stop groove on the anvil rod, and the control end on the safety bolt can break away from the firing handle. When performing suturing operation, pull the operating end of the safety bolt to rotate the safety bolt so that the control end on the safety bolt is separated from the firing handle, then the firing handle is clamped and rotated and then the operating end of the safety bolt is released, and the pressure on the safety bolt The block is pressed on the flange of the firing handle under the action of the firing spring and the safety spring, so that the firing handle can only be clamped and rotated but cannot be opened in the opposite direction. When continuing to clamp the firing handle again, the briquetting block on the safety bolt slides on the flange of the firing handle under the action of the safety spring and continues to be pressed on the flange of the firing handle, so that the firing handle can only be clamped and rotated It cannot be opened in the opposite direction. When the suturing operation is completed, pull the operating end of the safety bolt to turn the safety bolt so that the pressure block on the safety bolt is separated from the flange of the firing handle, and the firing spring makes the firing handle return to the open state. At this time, release the safety bolt. The operating end of the bolt makes the control end of the safety bolt return to the position supporting the firing handle under the action of the safety spring.

Further complementing the above-mentioned embodiment is: when the sewing operation is completed, after the briquetting block on the safety bolt moves out of the flange on the firing handle, the safety bolt bounces to the firing handle under the action of the safety spring, and the impact sound and the safety bolt are released. The positional movement alerts the surgeon that the suturing is complete. At this time, pull the operating end of the safety bolt to rotate the safety bolt so that the pressure block of the safety bolt is separated from the flange of the firing handle, the firing spring makes the firing handle return to the open state, and then loosen the operating end of the safety bolt to activate the firing handle. The control end of the safety bolt returns to the position supporting the firing handle under the action of the safety spring.

The contact between the flange of the firing handle and the pressure block of the safety catch can be smooth or have ratchets. The ratchets may be stepped, zigzag or other suitable shape.

In this way, in addition to the safety function, the safety mechanism of the present invention also has the function of prompting the sound and position of the suture completion, and the anti-opening function during the process of clamping the firing handle, so that the surgeon can relax when it is difficult to clamp the firing handle. It will not affect the operation once, and you can know the time when the suture has been completed in time, so you can proceed to the next step with confidence.

There are adjustment knob, nail anvil bar, indication window and position pointer in the adjustment indicating mechanism of the present invention. The adjustment knob adjusts the distance between the anvil and the staple bin through the anvil rod and drives the indicator mark on the position pointer to move back and forth inside the transparent indicator window located at the stapler body. At the distance and position between the anvil and the staple cartridge that allow the suturing operation to be performed on the indication window, mark the indication scale along the oblique line segment in the direction that is angled to the moving direction of the position pointer. There is a magnifying glass at the position marked with a diagonal line on the indicator window. Because when the indicator mark on the position pointer moves, the slash line segment marked by the indicator scale on the indicator window along the direction of the moving direction of the position pointer is longer than the straight line segment marked along the moving direction of the position pointer, so it has magnification. effect. When the indicator mark on the position pointer is driven by the adjusting knob to the position where the suturing operation is allowed, the magnifying glass enlarges the distance and the position between the anvil and the staple bin indicated by the indicator mark on the position pointer from the indicator scale of the indication window. On the indication window, the distance and position between the anvil and the staple bin that are not allowed to perform the suturing operation can be marked on the straight line along the moving direction of the position pointer by 1:1. In this way, when the distance between the anvil and the staple bin is adjusted by the adjustment knob, the adjustment knob drives the indicator mark on the position pointer to move back and forth inside the indicator window located at the stapler body, indicating the nail on the indicator scale of the indicator window. Various distances and positions between the anvil and the staple cartridge. The indicator mark on the position pointer of the present invention may be the generatrix of the prism, or the corner line of the ladder, or the boundary line of two different colors or other suitable indicator marks.

An anvil bar and an adjusting knob installed at the tail of the stapler body are arranged in the adjusting indicating mechanism. The outer periphery of the tail of the anvil rod has fixed short-pitch threads and long screw grooves. The short pitch threads on the anvil shank are located in front of the long flight channels. The inner bore of the adjustment knob has a fixed position short pitch thread and a projection. The short-pitch threads of the adjustment knob are located in front of the tabs. The projection in the inner hole of the adjusting knob can be screw-tooth-shaped, and can also be cylindrical, circular truncated, prism-shaped, truncated truncated or other shapes that can match the long screw groove on the anvil rod. The axial length between the rear end of the short-pitch thread and the front end of the long screw groove on the anvil rod is approximately equal to the sum of the axial lengths of the front end of the short-pitch thread of the adjusting knob and the projection. The long screw groove and the short-pitch thread on the anvil bar respectively form a fast and slow transmission mechanism with the projection on the inner hole of the adjustment knob and the short-pitch thread. When the distance between the anvil and the staple cartridge is close to and reaches the position between the clamping thickness of the suturing operation, the protrusion of the adjustment knob is separated from the long screw groove on the anvil rod, and the short pitch of the adjustment knob is now The threads intermesh with short pitch threads on the anvil shank. When the distance between the anvil and the staple bin is greater than the position between the above-mentioned clamping thicknesses where the suturing operation can be performed, the short-pitch thread of the adjustment knob is disengaged from the short-pitch thread on the anvil rod, and the projection of the adjustment knob is now Interengages with the long threaded groove on the anvil shank. When the distance between the anvil and the staple bin is in the transition state of the above two positions, the short-pitch thread and the protrusion of the adjusting knob are simultaneously located between the rear end of the short-pitch thread and the front end of the long screw groove on the anvil rod. And this moment, the screw groove of the short-pitch thread rear end on the anvil rod is aligned with the screw teeth of the short-pitch thread front end of the adjustment knob, and the front end of the long screw groove on the anvil rod is aligned with the projection of the adjustment knob.

What further supplements the above-mentioned embodiment is that: the front end of the long screw groove on the anvil bar has the same guide screw groove as the pitch of the short-pitch screw thread on the anvil bar. When the projection of the adjusting knob enters the guide screw groove from the long screw groove on the anvil bar, the short pitch thread of the adjusting knob enters the short pitch thread on the anvil bar. When the projection of the adjusting knob enters the long screw groove by the guide screw groove on the anvil bar, the short-pitch thread of the adjusting knob breaks away from the short-pitch thread on the anvil bar.

The adjustment indicator mechanism has a butterfly-shaped adjustment knob installed at the tail of the stapler body, and the tail of the stapler body is provided with a flange near the butterfly-shaped adjustment knob.

In this way, the adjustment indicating mechanism in the present invention can reduce the operating force by adopting the butterfly adjustment knob to adjust the distance between the nail anvil and the nail bin. The flange at the end of the stapler body close to the butterfly adjustment knob can prevent the error of changing the clamping thickness caused by driving the butterfly adjustment knob when suturing. When the distance between the anvil and the staple magazine is greater than the position between the clamping thicknesses where the suturing operation can be performed, the transmission mechanism of the long-pitch screw groove and the protrusion can be used to quickly gather the tissue to be sutured to save operating time. When the distance between the anvil and the staple magazine reaches the position between the clamping thickness of the suturing operation, the transmission mechanism of the screw teeth and the screw groove of the short-pitch thread is used to reduce the contact stress, and the clamping can be finely adjusted Thickness, in order to ensure the suture quality. The fast and slow screw transmission mechanism has no movable switching parts when switching between fast and slow, so as to improve the reliability of switching. The scale on the indicating window has a more detailed indication of the position between the anvil and the staple cartridge, so that the surgeon can more clearly understand the specific position between the staple anvil and the staple cartridge, so as to facilitate correct selection of the corresponding operation.

The suturing nail in the present invention is U-shaped with the nail feet flared outwards, and there is a concave oblique chute at the nail feet where the staples are placed in the staple bin opening of the staple cartridge. After the staple is loaded into the mouth of the staple bin, the nail tip on the nail foot of the staple springs into the inclined chute in the mouth of the staple bin. When the staple pusher pushes the staple, the nail tip on the staple foot of the staple first slides along the oblique chute in the staple bin opening to gather the outwardly opened staple foot into a U-shape that does not open outward. Then the staples are pushed out of the staple bin mouth until they reach the forming grooves of the staples on the anvil, so that the U-shaped staples are bent into a B-shape. In this way, dozens of staples in the staple cartridge can be prevented from being lost during transportation and use.

The part where the staples are placed in the staple cartridge of the present invention is made of transparent plastic. In this way, during assembly, inspection and use, it can be seen whether the staples placed in the transparent staple cartridge are missing.

Specific implementation method and description of drawings

By way of example, the best embodiment of the surgical tubular stapler of the present invention is stated below in conjunction with the accompanying drawings. The corresponding implementation methods of surgical linear stapler, surgical side-side stapler, surgical endoscopic surgical stapler and other surgical staplers can refer to the various implementation methods of surgical tubular stapler Choose according to your needs. The scope of the invention will be indicated in the claims. It should be recognized that some or all of the drawings are illustrative diagrams illustrating preferred embodiments of the invention and do not depict the true dimensions of the parts shown. The practical manner in which these and other objects and advantages of the invention are achieved will become more clearly understood by reference to the detailed description of the preferred embodiment.

Fig. 1 is the exterior view that shows the surgical tubular stapler of the embodiment of the present invention;

Fig. 2 is a partial cross-sectional view showing the nail anvil and the nail bin at the head of the surgical tubular stapler of Fig. 1;

Fig. 3 is a partial sectional view showing a structure of the a-a section of the staple cartridge of the surgical tubular stapler of Fig. 2;

Fig. 4 is a front view showing the staples of the surgical tubular stapler of Fig. 1;

Fig. 5 is a partial cross-sectional view showing another structure of the a-a section of the staple cartridge of the surgical tubular stapler of Fig. 2;

Fig. 6 is a partial sectional view showing that the staples of the surgical tubular stapler of Fig. 3 are partially pushed out of the staple cartridge;

Fig. 7 shows that when the distance between the anvil and the staple bin is greater than the clamping thickness of the clamping thickness of the surgical tubular stapler in Fig. 1, the rear part of the surgical tubular stapler removes the left stapler body Partial sectional view of

Fig. 8 shows that when the distance between the nail anvil and the staple bin reaches the position where the clamping thickness of the suture operation can be performed in the surgical tubular stapler of Fig. 1, the rear part of the surgical tubular stapler removes the left stapler body Partial sectional view of

Fig. 9 is a partial view showing another structure of the short-pitch screw thread and the long screw groove at the anvil rod afterbody of the surgical tubular stapler of Fig. 2;

Fig. 10 shows the surgical tubular stapler of Fig. 1 when the distance between the anvil and the staple bin is in the transitional state of the two positions shown in Fig. 7 and Fig. 8, the rear part of the surgical tubular stapler is removed from the left stapler Partial sectional view of the body;

Fig. 11 is a partial front view of the rear part of the surgical tubular stapler shown in Fig. 1 when the surgical tubular stapler is suturing the tissue;

Fig. 12 is a partial sectional view showing the b-b section of the surgical tubular stapler in Fig. 11 .

The parts and mechanisms of the surgical tubular stapler according to the embodiment of the present invention are described below in conjunction with Fig. 1 to Fig. 12, explaining the parts and their mutual connection and function, and the action process and effect of each mechanism in each operation step .

In the surgical tubular stapler shown in FIG. 1 , directions 1 and 2 represent up and down, directions 3 and 4 represent front and rear, and directions 5 and 6 represent left and right. The staple bin 7 of the tubular stapler for surgery is installed on the head of the stapler body 8, the nail anvil 9 is installed on the head of the anvil rod 10 and is positioned in front of the staple bin 7, and a trigger is installed on the stapler body 8 trunk. Handle 11, safety lock 12, indication window 13 and position pointer 14, are equipped with butterfly adjustment knob 15 at the afterbody of stapler body 8.

As shown in FIGS. 2 to 4 , the staple cartridge 7 is equipped with a pusher seat 16 , a cutting knife 17 , a staple cartridge piece 18 and staples 19 . A knife anvil 20 is installed in the nail anvil 9 . Staple forming grooves 21 corresponding to the positions of the staples 19 in the staple cartridge 7 are arranged on the end surface of the staple anvil 9 . Staples 19 are placed within transparent cartridge sheet 18 . The staple 19 is U-shaped with the nail feet 22 flared outwards, and the nail foot 22 of the staple 19 placed in the staple bin opening 23 of the staple cartridge 18 has a concave oblique chute 24 . After the staple 19 is loaded into the staple bin opening 23, the nail tip 25 on the nail foot 22 of the staple staple 19 bounces into the inclined chute 24 in the staple bin opening 23. When the nail pusher 26 drives the nail pusher 16 to push the staple 19, the nail point 25 on the nail foot 22 of the staple 19 slides along the inclined chute 24 in the staple bin opening 23 to open the outwardly opened staple 19. The nail feet 22 of the nails are gathered into a U-shape that does not open outwards, and then the staples 19 are pushed out of the staple bin 7 to penetrate the tissues 27 and 28 to be sutured until they reach the staple forming groove 21 (see Figure 6) on the anvil 9, so that The U-shaped staple 19 is bent into a B-shape. Fig. 5 is a partial cross-sectional view showing another structure of the oblique chute in the nail bin mouth, except that the shapes of the oblique chute 29 and the oblique chute 24 are different, wherein the parts and their interconnections and effects are basically the same as those in Fig. 3 of the same.

As shown in FIGS. 7 to 11 : a safety bolt 12 and a safety spring 30 are arranged in the safety mechanism. A firing handle 11 and a firing spring 31 are arranged in the firing mechanism. The firing handle 11 is installed on the stapler body 8 and can pivot. The firing handle 11 pushes the pusher rod 26 to move in the stapler body 8 to push the pusher seat 16 and staples 19 in the staple cartridge 7 (see FIG. 2 ). The firing spring 31 always makes the firing handle 11 tend to open. The safety bolt 12 is installed on the stapler body 8 and can pivot. The safety bolt 12 has an operating end 32 , a control end 33 , a stop block 34 and a pressure block 35 . The control end 33 is used to support or disengage the firing handle 11 , and the operating end 32 is used to operate the rotation of the safety catch 12 . The safety spring 30 always makes the control end 33 of the safety bolt 12 tend to support the state of the firing handle 11 . Flange 36 is arranged on percussion handle 11. A stop groove 37 is arranged on the nail anvil bar 10 .

When the distance between the nail anvil 9 and the nail bin 7 was greater than the position between the clamping thickness of the suturing operation, the nail anvil rod 10 prevented the stop block 34 on the safety bolt 12 from swinging, so that the control on the safety bolt 12 The end 33 maintains the state of supporting the firing handle 11 . When the distance between the nail anvil 9 and the nail bin 7 is displaced from zero to a position between the clamping thickness that can perform the suturing operation, the stop groove 37 on the nail anvil rod 10 is located at the stop block 34 on the safety bolt 12 At the position, pull the operating end 32 of the safety bolt 12 to make the safety bolt 12 rotate. When the safety bolt 12 rotates, the stop block 34 on the safety bolt 12 enters the stop groove 37 on the anvil rod 10, and the control end 33 on the safety bolt 12 can be disengaged. Trigger handle 11.

When performing suture operation, pull the operating end 32 of the safety bolt 12 to rotate the safety bolt 12 so that the control end 33 on the safety bolt 12 breaks away from the firing handle 11, and then the firing handle 11 is clamped and rotated to release the safety bolt 12. The operating end 32 and the pressure block 35 on the safety bolt 12 are pressed on the flange 36 of the firing handle 11 under the action of the firing spring 31 and the safety spring 30, so that the firing handle 11 can only be clamped and rotated but cannot be stretched in the opposite direction. open. When continuing to clamp the firing handle 11 again, the briquetting block 35 on the safety plug 12 slides on the flange 36 of the firing handle 11 under the effect of the safety spring 30 and continues to be pressed on the flange 36 of the firing handle 11 to continue to make the firing The handle 11 can only be clamped and rotated but cannot be opened in the opposite direction. When finishing the sewing operation, after the briquetting block 35 on the safety bolt 12 moved out of the flange 36 on the firing handle 11, the safety bolt 12 bounced to the firing handle 11 under the action of the safety spring 30, and the impact sound and safety bolt 12 The positional movement alerts the surgeon that the suturing is complete. Now, pull the operating end 32 of the safety bolt 12 to rotate the safety bolt 12 to make the briquetting block 35 of the safety bolt 12 break away from the flange 36 of the firing handle 11, and the firing spring 31 makes the firing handle 11 get back to the opened state. Then unclamp the operating end 32 of the safety bolt 12 to make the control end 33 of the safety bolt 12 return to the position supporting the firing handle 11 under the action of the safety spring 30 .

As shown in FIGS. 7 to 12 , the adjustment indicator mechanism includes a butterfly adjustment knob 15 , anvil rod 10 , indication window 13 and position pointer 14 . Butterfly adjustment knob 15 is installed on the suturing device body 8 afterbody. There is a flange 38 near the butterfly adjustment knob 15 at the afterbody of the stapler body 8 . The butterfly adjustment knob 15 adjusts the distance between the anvil 9 and the staple bin 7 through the anvil bar 10 and drives the indicator mark 39 on the position pointer 14 to move back and forth inside the transparent indicator window 13 positioned at the stapler body 8 trunk. On the indication window 13 for the distance and position between the anvil 9 and the staple cartridge 7 that allow the suturing operation, an indicator scale is marked on the oblique line segment 40 in the direction angled to the moving direction of the position pointer 14 . There is a magnifying glass 41 at the position where the oblique line segment 40 is marked on the indication window 13 . On the indication window 13, the distance and the position between the anvil 9 and the staple bin 7 that are not allowed to perform the suturing operation are marked on the straight line segment 42 along the moving direction of the position pointer 14 by 1:1. Because when the indicator mark 39 on the position pointer 14 moved, the oblique line segment 40 marked on the indicator scale on the indicating window 13 along the direction of the angle with the direction of movement of the position pointer 14 was longer than that marked along the direction of movement with the position pointer 14. The straight line segment 42 thus has a magnifying effect. When the distance between the nail anvil 9 and the staple bin 7 is adjusted by the butterfly adjusting knob 15, the butterfly adjusting knob 15 drives the indicator mark 39 on the position pointer 14 to be positioned at the inner side of the indicating window 13 of the stapler body 8 trunk. Move, indicate various distances and positions between the nail anvil 9 and the nail bin 7 from the indication scale of the indication window 13. When the indicator mark 39 on the position pointer 14 is driven by the butterfly adjustment knob 15 to arrive at the position that allows the sewing operation to be performed, the magnifying glass 41 enlarges the indicator mark 39 on the display position pointer 14 from the slash segment 40 of the indicator scale of the indicator window 13 The distance and position between the indicated nail anvil 9 and the nail cartridge 7.

The outer circumference of the anvil rod 10 afterbody has a fixed short-pitch screw thread 43 and a long screw groove 44 . The short pitch thread 43 on the anvil shaft 10 is located in front of the long thread groove 44 . The inner hole of the butterfly adjusting knob 15 has a fixed short-pitch thread 45 and a projection 46 . The short pitch thread 45 of the butterfly adjustment knob 15 is located in front of the lug 46 . The front end of the long screw groove 44 on the anvil bar 10 has the same guide screw groove 47 as the pitch of the short-pitch thread 43 on the anvil bar 10 . The axial length between the rear end of the short-pitch thread 43 and the front end of the long screw groove 44 on the anvil rod 10 is approximately equal to the sum of the axial lengths of the front end of the short-pitch thread 45 of the butterfly adjusting knob 15 and the projection 46 . The long screw groove 44 and the short-pitch thread 43 on the anvil bar 10 form fast and slow transmission mechanisms with the projection 46 and the short-pitch thread 45 on the inner hole of the butterfly adjustment knob 15 respectively. When the distance between the nail anvil 9 and the nail bin 7 approaches and reaches the position between the clamping thickness that can perform the suturing operation, the projection 46 of the butterfly adjustment knob 15 disengages from the long screw groove 44 on the nail anvil rod 10 At this time, the short-pitch thread 45 of the butterfly-shaped adjusting knob 15 and the short-pitch thread 43 on the anvil rod 10 are engaged with each other. When the distance between the nail anvil 9 and the nail bin 7 is greater than the position between the above-mentioned clamping thicknesses where the suture operation can be performed, the short-pitch thread 45 of the butterfly-shaped adjustment knob 15 is disengaged from the short-pitch thread 43 on the anvil rod 10 At this time, the projection 46 of the butterfly adjustment knob 15 is engaged with the long screw groove 44 on the anvil rod 10 . When the distance between the nail anvil 9 and the nail bin 7 is in the transition state of the above two positions, the short-pitch thread 45 and the projection 46 of the butterfly adjustment knob 15 are simultaneously located at the rear end of the short-pitch thread 43 on the anvil rod 10 Between the front end of the long screw groove 44, and at this moment, the screw teeth 48 of the short pitch thread 43 rear end on the anvil rod 10 are aligned with the screw groove 49 at the front end of the short pitch thread 45 of the butterfly adjustment knob 15, and the anvil The front end of the long screw groove 44 on the rod 10 is aligned with the protrusion 46 of the butterfly adjusting knob 15 . When the projection 46 of the butterfly adjusting knob 15 enters the guide screw groove 47 from the long screw groove 44 on the anvil bar 10 , the short pitch thread 45 of the butterfly adjusting knob 15 enters the short pitch thread 43 on the anvil bar 10 . When the projection 46 of the butterfly adjusting knob 15 enters the long screw groove 44 by the guide screw groove 47 on the anvil bar 10, the short pitch thread 45 of the butterfly adjusting knob 14 disengages from the short pitch thread 43 on the anvil bar 10 .

Another structure shown in Fig. 9 is that the front end of the long screw groove 44 on the anvil bar 10 has the same pitch as the short-pitch thread 43 on the anvil bar 10, a longer guide screw than the above-mentioned guide screw groove 47. Slot 50.

According to the above detailed introduction, it can be seen that the surgical stapler of the present invention has the following characteristics: when the surgeon uses the surgical stapler of the present invention, he can operate and adjust the indicating mechanism to achieve the required clamping thickness between the anvil and the staple bin. , so that the tissue to be sutured is clamped between the anvil and the staple cartridge. After the tissue is clamped, the safety mechanism is opened, and the firing mechanism can be operated to push the pusher rod to move in the stapler body to push out the pusher seat and staples in the staple cartridge. When the staple is pushed out from the staple bin, it penetrates the clamped tissue to be sutured and reaches the forming groove on the anvil, so that the U-shaped staple is bent into a B-shape to achieve the purpose of suturing the tissue. For the operation that needs to cut the tissue to be sutured, the cutting knife can be pushed out to cut the clamped tissue to be sutured on the anvil in the anvil while operating the firing mechanism to push out the staple push seat and the staple in the staple bin. The sutured tissue can be cut with a scalpel. After the suturing operation is completed, the adjustment indicator mechanism is operated to increase the distance between the anvil and the staple bin, and loosen the sutured tissue so as to withdraw from the surgical stapler.

The adjustment indicating mechanism in the surgical stapler of the present invention: the operating force can be reduced by using the butterfly adjustment knob to adjust the distance between the nail anvil and the nail bin. The flange at the end of the stapler body close to the butterfly adjustment knob can prevent the error of changing the clamping thickness caused by driving the butterfly adjustment knob when suturing. When the distance between the staple anvil and the staple cartridge is greater than the position between clamping thicknesses where the suturing operation can be performed, the tissue to be sutured can be quickly gathered to save operating time. When the distance between the nail anvil and the staple cartridge approaches and reaches a position between the clamping thickness that can perform the suturing operation, the clamping thickness can be finely adjusted to ensure the suturing quality. The fast and slow screw transmission mechanism has no movable switching parts when switching between fast and slow, so as to improve the reliability of switching. The indicator scale on the indicator window has a lens magnified structure and more detailed indication of the distance and position between the anvil and the staple cartridge, so that the surgeon can clearly understand the specific position between the staple anvil and the staple cartridge, and is convenient for correcting. Choose the appropriate action.

The safety mechanism in the surgical stapler of the present invention: only when the range of the clamping thickness that can perform the suturing operation is reached between the nail anvil and the nail bin, the safety bolt allows the firing handle to be fired; When the distance between them deviates from the range of the clamping thickness that can perform the suturing operation, the safety bolt will prevent the firing handle from being fired, thereby avoiding the accident that the firing handle is fired by mistake, so as to ensure the safety of the suturing operation. Once the surgeon confirms that each step is correct, the safety catch can be opened, the firing handle can be clamped, and the suturing operation can be completed. In addition to the insurance function, the insurance mechanism also has the function of prompting the sound and position of the suture completion and the anti-opening function during the process of clamping the firing handle, so that the surgeon can relax when it is difficult to clamp the firing handle without affecting the operation. operation, you can also know in time when the suture operation has been completed, and proceed to the next step with confidence. After the tissue is sutured, turn the safety plug, release the firing handle, and the push nail seat and the ring knife will automatically retract into the staple cartridge to prevent damage to the surrounding tissue.

In the surgical stapler of the present invention, the staples placed in the staple cartridge are stuck under the inclined chute in the staple cartridge opening, which can prevent dozens of staples in the staple cartridge from being lost during transportation and use. The part of the staple bin where the staples are placed is made of transparent plastic, so that it is convenient to observe clearly whether dozens of staples in the staple bin are lacking one by one. In this way, the failure of the suturing operation due to missing staples can be effectively avoided.

The above-mentioned features that the surgical stapler of the present invention has can be used according to the needs of tubular staplers, linear staplers, side-side staplers, endoscopic surgical staplers, and other surgical staplers of various styles. , choose the corresponding structure combination to achieve the best implementation form.

Compared with various existing surgical staplers, the surgical stapler of the present invention is more convenient, more accurate, less labor-saving, more time-saving, safer to use, more convenient to assemble, and has lower production costs, and is particularly suitable for Mass production of high-quality and low-cost disposable surgical staplers on an assembly line.

It will thus be seen that the above stated objectives, including those indicated by the foregoing description, are effectively achieved. What is described here is only a typical best implementation form of the application of the present invention, and some changes can be made to the above structures without departing from the spirit and scope of the present invention. The invention is not limited or restricted to the specific details set forth herein, but is reserved for any improvements or modifications apparent to one of ordinary skill in the art as set forth in the definitions of the claims.

Claims (9)

1. A surgical stapler, the components of which include: a stapler body, a staple cartridge mounted on the head of the stapler body, a nail anvil installed at a position opposite to the staple cartridge, a pusher installed in the staple cartridge Nail holder, the staples that are installed in the above-mentioned staple bin and can be pushed out by the above-mentioned staple pusher, are arranged on the end surface of the above-mentioned nail anvil and correspond to the positions of the staples in the above-mentioned staple bin, and are installed in the above-mentioned stapler body The nail anvil bar whose head is equipped with the above-mentioned nail anvil, the nail-pushing rod installed in the above-mentioned suturing device body and whose head is equipped with the above-mentioned nail-pushing seat, the adjustment instruction for adjusting the distance between the above-mentioned nail anvil and the nail bin Mechanism, a firing mechanism that pushes the above-mentioned nail pusher to move in the above-mentioned stapler body to push out the above-mentioned nail pusher seat and staples in the above-mentioned staple cartridge, and a safety mechanism that prevents the above-mentioned nail pusher seat and staples in the above-mentioned staple cartridge from being pushed out by mistake , the auxiliary parts installed in the above-mentioned suturing device body; It is characterized in that: the above-mentioned safety mechanism has a safety bolt and a safety spring; the above-mentioned firing mechanism has a firing handle and a firing spring; the above-mentioned firing handle is installed on the body of the above-mentioned stapler and can pivot; Move in the above-mentioned stapler body to push the above-mentioned push nail seat and staples in the above-mentioned staple bin, the above-mentioned firing spring always makes the above-mentioned firing handle tend to open state, and the above-mentioned safety bolt is installed on the above-mentioned stapler body and can pivot Rotate, the safety bolt has an operation end and a control end, the control end is used to support or break away from the firing handle, the operation end is used to operate the rotation of the safety bolt, and the safety spring always makes the control end of the safety bolt tend to In the state of supporting the above-mentioned firing handle, there is a flange on the above-mentioned firing handle, and there is a pressing block on the above-mentioned safety bolt; Break away from the firing handle, and then the firing handle is clamped and rotated, and then the operating end of the safety bolt is released, and the pressure block on the safety bolt is pressed against the flange of the firing handle under the action of the firing spring and the safety spring , so that the above-mentioned firing handle can only be clamped and rotated and cannot be opened in the opposite direction; when the above-mentioned firing handle is continued to be clamped, the pressing block on the above-mentioned safety bolt will be on the flange of the above-mentioned firing handle under the action of the above-mentioned safety spring. Slide and continue to press on the flange of the firing handle, so that the above-mentioned firing handle can only be clamped and rotated and cannot be opened in the opposite direction; when the suturing operation is completed, pull the operating end of the safety bolt to rotate the safety bolt to make the safety The briquetting block on the bolt is separated from the flange of the above-mentioned firing handle, and the above-mentioned firing spring makes the above-mentioned firing handle return to the open state. Return to the position supporting the firing handle under action. 2. The surgical stapler according to claim 1, characterized in that there are ratchet teeth on the flange of the firing handle and the pressing block of the safety plug; Turn the safety bolt so that the control end on the safety bolt is separated from the above-mentioned firing handle. After the above-mentioned firing handle is clamped and rotated, the above-mentioned safety bolt is released. On the flange of the above-mentioned firing handle, the ratchet teeth on the flange of the above-mentioned firing handle and the pressing block of the above-mentioned safety bolt are engaged with each other, so that the above-mentioned firing handle can only be clamped and rotated and cannot be opened in the opposite direction; When continuing to clamp the above-mentioned percussion handle, the ratchet on the briquetting block of the above-mentioned safety bolt slides on the ratchet of the flange of the above-mentioned percussion handle under the effect of the above-mentioned safety spring and continues to be pressed on the flange of the percussion handle, so that the above-mentioned The firing handle can only be clamped and rotated and cannot be opened in the opposite direction; when the suturing operation is completed, the operating end of the above-mentioned safety bolt is pulled to rotate the safety bolt so that the pressure block on the safety bolt is separated from the flange of the above-mentioned firing handle. The above-mentioned firing spring makes the above-mentioned firing handle return to the open state. At this time, unclamping the operating end of the above-mentioned safety bolt makes the control end of the safety bolt return to the position supporting the above-mentioned firing handle under the action of the above-mentioned safety spring. 3. The surgical stapler according to claim 1, characterized in that, when the suturing operation is completed, after the pressure block on the above-mentioned safety plug moves forward and out of the front end of the flange on the above-mentioned firing handle, the above-mentioned safety plug is on the above-mentioned Under the action of the safety spring, it springs forward to the above-mentioned percussion handle. 4. The surgical stapler according to claim 1, characterized in that, when the suturing operation is completed, after the pressing block on the above-mentioned safety plug moves forward and out of the front end of the flange on the above-mentioned firing handle, the above-mentioned safety plug is on the above-mentioned Under the action of the safety spring, it bounces forward to the above-mentioned firing handle. At this time, the operating end of the above-mentioned safety bolt is pulled to make the pressing block of the safety bolt disengage from the rear end of the flange of the above-mentioned firing handle, and the above-mentioned firing spring makes the above-mentioned firing handle Return to the opened state, and then unclamp the operating end of the above-mentioned safety bolt to make the control end of the safety bolt return to the position of supporting the above-mentioned firing handle under the action of the above-mentioned safety spring. 5. The surgical stapler according to claim 1, wherein the adjustment indicator mechanism includes the anvil rod and an adjustment knob installed at the tail of the stapler body, and the outer circumference of the tail of the anvil rod is fixed in position. The short-pitch thread and long screw groove of the above-mentioned nail anvil rod are located in front of the long screw groove, and the inner hole of the above-mentioned adjusting knob has a fixed short-pitch thread and a bump, and the short-pitch thread of the above-mentioned adjusting knob Located in front of the bump, the long screw groove and short pitch thread on the above-mentioned nail anvil bar and the bump on the inner hole of the above-mentioned adjustment knob and the short-pitch thread respectively form a fast and slow transmission mechanism; When the distance is at the position where the clamping thickness of the suturing operation can be performed, the projection of the above-mentioned adjusting knob is disengaged from the long screw groove on the above-mentioned anvil bar. The pitch threads are engaged with each other; when the distance between the above-mentioned nail anvil and the nail bin is greater than the above-mentioned position where the clamping thickness of the suturing operation can be performed, the short-pitch thread of the above-mentioned adjusting knob is disengaged from the short-pitch thread on the above-mentioned nail anvil rod. At the same time, the projection of the above-mentioned adjusting knob is engaged with the long screw groove on the above-mentioned nail anvil bar. 6. The surgical stapler according to claim 5, characterized in that, the front end of the long screw groove on the anvil rod has a guide screw groove with the same pitch as the short-pitch thread on the anvil rod; When the projection of the knob enters the guide screw groove from the long screw groove on the above-mentioned anvil rod, the short-pitch thread of the above-mentioned adjusting knob enters the short-pitch thread on the above-mentioned anvil rod; When the guide screw groove on the top enters the long screw groove, the short-pitch thread of the above-mentioned adjusting knob disengages from the short-pitch thread on the above-mentioned anvil rod. 7. The surgical stapler according to claim 1, characterized in that the adjustment indicator mechanism has a butterfly-shaped adjustment knob installed at the tail of the stapler body, and there is a flange. 8. The surgical stapler according to claim 1, wherein the part of the staple cartridge where the staples are placed is made of transparent plastic. 9. The surgical stapler according to claim 1, characterized in that, a nail pushing seat with a cutting knife is installed in the above-mentioned staple cartridge, and a knife corresponding to the position of the cutting knife in the above-mentioned staple cartridge is installed in the above-mentioned nail anvil. anvil.

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