WO2013091445A1

WO2013091445A1 - Clamping thickness adjustment mechanism for a surgical linear cutting anastomat

Info

Publication number: WO2013091445A1
Application number: PCT/CN2012/084132
Authority: WO
Inventors: 张祖仁; 蒋震宇; 李苏英; 杨卫民; 吉荣; 张奕奕; 徐维华
Original assignee: 常州市康迪医用吻合器有限公司
Priority date: 2011-12-21
Filing date: 2012-11-06
Publication date: 2013-06-27
Also published as: CN103169513A; CN103169513B

Abstract

A clamping thickness adjustment mechanism (10) for a surgical linear cutting anastomat (7). The clamping thickness adjustment mechanism (10) is composed of a nail chamber bracket (12), an anvil bracket (16), a clamping hook (19), a sliding block (20) for clamping thickness adjustment, and a sliding protruding block (21). When the sliding block (20) for clamping thickness adjustment moves along the longitudinal direction of the anvil bracket (16), the distance between a protruding block (30) on the sliding protruding block (21) arranged on an anvil assembly (9) and a pivot (22) on the nail chamber bracket (12) of a nail chamber assembly (8) is adjusted, and meanwhile the distance between a protruding block (28) of the sliding block (20) for clamping thickness adjustment arranged on the anvil assembly (9) and a pressing block (23) on the nail chamber bracket (12) of the nail chamber assembly (8) is adjusted as well. As the distance between a pivot hole (24) on the clamping hook (19) and a hook (25) is constant, so that the clamping thickness adjustment mechanism (10) adjusts the thickness of clamped tissue between the nail chamber assembly (8) and the anvil assembly (9).

Description

Clamping thickness adjustment mechanism for surgical linear cutting stapler

The present invention relates to a clamping thickness adjustment mechanism for use in various surgical linear cutting staplers, and more particularly to a clamping thickness adjustment mechanism for a surgical linear cutting stapler having an adjustable thickness. Background technique

Various surgical linear cutting staplers are used to replace needle-to-hand anastomosis in surgical procedures, and are being widely used for end, end and side anastomosis of organs and tissues such as human digestive tract organs, respiratory organs and genitourinary organs. Surgery, surgery to form organ channels and closed incision surgery, especially for the anastomosis of organs and tissues that are difficult to expose and operate, can reduce the operation time and improve the quality of surgery.

As described in U.S. Patent Publication Nos. 20050222616, 20080116244, and 20090308909: Various known surgical linear cutting staplers consist of a cartridge assembly, an anvil assembly, and a clamping mechanism. The staple cartridge assembly has a staple cartridge, a staple cartridge holder for mounting the staple cartridge, and a firing mechanism mounted within the staple cartridge holder. The firing mechanism consists of a push button, a slider, a push rod, a pusher and a cutter. The staple cartridge is linear and can be either linear or curved. A pusher block and a kiss nail are mounted in the staple cartridge. A plurality of staples are staggered in two or more rows within the staple cartridge. The anvil assembly has an anvil and a nail anvil. The anvil can be made in one piece with the anvil frame. The anvil is linear and can be either linear or curved. An anastomosis forming groove corresponding to the position of the staple in the staple cartridge is arranged on the surface of the anvil. A plurality of staple forming grooves are staggered in two or more rows on the surface of the anvil. The clamping mechanism is composed of a staple cartridge frame, a nail anvil frame and a clamping hook, and the clamping hook is pivotally connected with the nail cartridge frame/nail anvil frame. When the operation of clamping the tissue to be anastomosis is performed, the clamp hook pivots to hook the projection on the staple anvil/stack frame, and the tissue to be anastomosis is clamped between the anvil and the staple cartridge. The staples in the staple cartridge are U-shaped. When the pusher block pushes the staple out of the staple cartridge, the nail tip of the U-shaped staple is pressed against the forming groove of the anvil, and the two staple legs of the U-shaped staple are bent into the B along the forming groove. Shaped staples, the purpose of the surgery to achieve tissue anastomosis. In order to achieve the purpose of the anastomosis of the tissue, staples of different staple leg heights and staple cartridges of different heights are required for the tissue to be anastomosed with different clamping thicknesses. Since the tissue to be anastomosis is soft and elastic, it is difficult to determine the thickness of the suitable anastomosis tissue. In the operation, it is necessary to replace the staple cartridges of various staple thicknesses with different staple leg heights, generally every 0. The 5mm tissue clamping thickness is divided into one specification, which increases the number of surgical operations and the cost of the instrument. Therefore, the surgical linear cutting stapler of this type is difficult to meet the surgical requirements for matching various thickness tissues, thereby reducing the surgical effect and increasing the surgical effect. The difficulty of surgery and the cost of surgery. Because the clamping thickness adjustment mechanism of the linear cutting stapler is also required to be improved.

Surgical linear cutting staplers as described in U.S. Patent Nos. 1,201, 068, 044 and 2,110, 155, 787: The staples in the staple cartridge are U-shaped with two separate shaped grooves on the surface of the anvil. When the pusher block pushes the staples from the staple cartridge The nail tips of the staples are respectively pressed against the forming grooves of the anvil, so that the two nail legs of the staples are respectively bent into spiral-shaped staples along the two separate forming grooves to achieve the operation of anastomosis of the tissue. purpose. Since the two nail legs of the staple are bent into spiral staples, it is not necessary to use staples of different nail heights for the tissue to be anastomosed with different clamping thicknesses, and only the staples with the same nail leg height are used. The same staple cartridge, by adjusting the clamping gap between the cartridge assembly and the anvil assembly by clamping the thickness adjustment mechanism, can be adapted to match the tissue to be anastomosed with different clamping thicknesses. However, the clamping thickness adjustment mechanism needs to simultaneously adjust the sagittal position of the anvil and the platen when adjusting the clamping thickness. Wherein, in adjusting the sagittal position of the anvil plate, a step-shaped adjustment plate needs to be inserted into the anvil to support the stepped nail cutting plate with the forming groove. The unsatisfactory aspect of the clamping thickness adjustment mechanism of this type of surgical linear cutting stapler is: First, the anvil of the surgical linear cutting stapler is elongated, and the stepped adjustment plate is inserted into the anvil When the stepped nail cutting plate with the forming groove adjusts the sagittal position of the nail cutting board, it will be subjected to greater resistance and is not convenient for the operation; secondly, since the nail cutting board is thin, when the stepped adjusting plate is supported When the stepped nail cutting plate of the groove is formed, a large cavity is formed at each stepped interval of the adjusting plate and the nail cutting plate, so that when the nail tip of the staple is pressed against the forming groove of the anvil, the two nail legs are edged When the forming groove is bent and formed, the force generated will cause the anvil plate to bend and deform, affecting the correct formation of the staple, that is, affecting the surgical effect of the tissue anastomosis; Third, in order to support the stepped adjustment plate with the forming groove The stepped nail cutting plate adjusts the sagittal position of the nail cutting board. There are two guiding grooves on each side of the anvil. The guiding groove has a sagittal moving pin. The guiding groove and the sagittal moving pin will scratch the surrounding area. Fourthly, since the clamping mechanism of the cartridge assembly and the anvil assembly is a long cantilever structure, the adjustment plate and the anvil plate occupy a large space in the anvil, in order to make up for the nail weakened by the adjustment plate and the nail plate The anvil is rigid, so it is necessary to increase the width and height of the anvil, thus increasing the weight of the anvil and increasing the volume of the anvil, thereby easily causing operational fatigue and reducing the surgical adaptation range of the surgical stapler. Therefore, the clamping thickness adjustment mechanism of the surgical linear cutting stapler needs to be improved.

It is apparent from the above that a large number of different types of surgical linear cutting staplers have been designed, and the development of the clamping thickness adjustment mechanism of the new surgical linear cutting stapler continues, so that it can be used in large quantities every year in the world. The surgical linear cutting stapler is further improved to achieve a surgical effect that is lighter and more reliable in use and does not reduce the surgical adaptation range of the surgical linear cutting stapler. Summary of the invention

The object of the present invention is to provide a clamping thickness adjusting mechanism for a surgical linear cutting stapler, which realizes the clamping of the thickness adjusting slider and the chute when the clamping thickness adjusting slider moves along the longitudinal direction of the nail anvil frame. With the longitudinal movement along the anvil frame, the chute of the clamping thickness adjustment slider drives the sliding projection to move along the sagittal direction of the anvil frame under the constraint of the sagittal chute of the anvil frame, and is adjusted to be mounted on the anvil. Between the bump on the sliding tab on the assembly and the pivot on the cartridge holder of the cartridge assembly The distance between the bumps of the clamp thickness adjustment slider mounted on the anvil assembly and the clamps on the cartridge holder of the cartridge assembly is adjusted. Since the distance between the pivot hole on the clamping hook and the hook is constant, the clamping thickness adjustment mechanism achieves the effect of adjusting the thickness of the tissue clamped between the cartridge assembly and the anvil assembly. Since the clamping thickness adjustment mechanism moves on the anvil frame other than the anvil, neither occupying any position within the anvil nor changing the structure of the anvil, the tissue between the adjustment cartridge assembly and the anvil assembly is When clamping the thickness, the resistance is small, neither increasing the width and height of the anvil, nor affecting the rigidity and strength of the anvil, and there is no attachment structure that will scratch the surrounding tissue, that is, it is lighter to use. More reliable, does not reduce the surgical adaptation range of surgical linear cutting stapler, and improves the surgical effect of tissue anastomosis.

Another object of the present invention is to provide a clamping thickness adjusting mechanism for a surgical linear cutting stapler, which realizes the round pin of the sliding protrusion and simultaneously inserts into the sagittal sliding groove of the anvil frame and the wavy oblique of the clamping thickness adjusting slider In the groove, the spring keeps the round pin on the sliding projection toward the sagittal movement of the face of the anvil with the staple forming groove, so that when the clamping thickness adjustment slider moves along the longitudinal direction of the anvil frame, Under the action of the wavy chute and the spring of the tightness adjustment slider and the sagittal chute of the anvil frame, the protrusion on the sliding protrusion jumps in the wavy chute of the clamping thickness adjustment slider, continuously Changing the clamping thickness adjusts the resistance of the slider along the longitudinal movement of the anvil frame and makes a sound, so that the clamping thickness adjustment mechanism doublely reminds the operator to clamp the change of the thickness adjustment by feeling and sound; on the other hand, in the clip After the longitudinal movement of the tightness adjustment slider along the nail anvil frame, under the action of the wavy chute and the spring of the clamping thickness adjustment slider and the sagittal chute of the anvil frame Lug is fixed to the sliding projections on the adjusted position, so that the adjustment means to achieve the thickness of the clamping tissue between the cartridge assembly and the anvil assembly is secured in the desired position using the effect adjustment of the thickness of the clamping.

Currently, known surgical linear cutting staplers consist of a cartridge assembly, an anvil assembly, and a clamping thickness adjustment mechanism. The staple cartridge assembly has a staple cartridge, a staple cartridge holder for mounting the staple cartridge, and a firing mechanism mounted within the staple cartridge holder. The firing mechanism consists of a push button, a slider, a push rod, a pusher and a cutter. The staple cartridge is linear and can be either linear or curved. Pusher blocks and staples are mounted in the staple cartridge. A plurality of staples are staggered in two or more rows within the staple cartridge.

The anvil assembly has an anvil and a nail anvil. The anvil can be made in one piece with the anvil frame. The anvil is linear and can be either linear or curved. An anastomosis forming groove corresponding to the position of the staple in the staple cartridge is arranged on the surface of the anvil. A plurality of staple forming grooves are staggered in two or more rows on the surface of the anvil.

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

The clamping thickness adjusting mechanism of the surgical linear cutting stapler of the present invention is composed of a cartridge holder, a nail anvil frame, a clamping hook, a clamping thickness adjusting slider and a sliding projection. The magazine frame is provided with a pivot and a pressing block. The clamping hook is provided with a pivot hole and a hook. The pivot of the cartridge holder is inserted into the pivot hole of the clamping hook to form a pivotal connection of the clamping hook to the cartridge holder. A longitudinal chute and a sagittal chute are provided on the nail anvil. The clamping thickness adjustment slider has a protrusion at a proximal end and a chute at a distal end. The lugs on the sliding lugs are constrained within the chutes of the clamping thickness adjustment slider and into the sagittal chutes of the anvil frame. When the clamping thickness adjusting slider moves in the longitudinal direction of the nail anvil frame under the constraint of the longitudinal sliding groove of the nail anvil frame, the protrusions and the inclined grooves of the clamping thickness adjusting slider also move along the longitudinal direction of the nail anvil frame. The chute of the clamping thickness adjusting slider drives the sliding lug to move along the sagittal direction of the anvil frame under the constraint of the sagittal chute of the anvil frame, thereby achieving the adjustment of the lug on the sliding lug mounted on the anvil assembly. The purpose of adjusting the distance between the pivots on the cartridge holder of the cartridge assembly and the clamping of the clamping thickness adjustment slider mounted on the anvil assembly and the compact on the cartridge holder of the cartridge assembly The purpose of the distance between.

After the staple cartridge assembly and the anvil assembly are closed together, the clamping hook is pivoted around the staple cartridge frame, so that the hook on the clamping hook hooks the projection on the sliding projection, and the pressure of the compact on the cartridge holder is driven. On the lugs on the sliding lugs, the cartridge assembly and the anvil assembly are clamped by the clamping hooks. Since the distance between the pivot hole on the clamping hook and the hook is constant, the clamping thickness adjustment mechanism adjusts the thickness at which the tissue between the cartridge assembly and the anvil assembly is clamped.

The chute on the clamping thickness adjusting slider of the present invention may be stepped or wavy, and the chute may be open or closed.

The bumps on the clamping thickness adjusting slider of the present invention may be stepped, and the step faces of the stepped bumps may be flat or curved.

The clamping thickness adjusting mechanism of the surgical linear cutting stapler of the present invention, if the number of steps of the chute on the clamping thickness adjusting slider is larger, or the number of waves is larger, the step of clamping the bump on the thickness adjusting slider The greater the number, the more the thickness of the tissue between the cartridge assembly and the anvil assembly is clamped.

The sliding projection of the present invention may be a round pin. The round pin is simultaneously inserted into the sagittal chute of the anvil frame and clamped into the chute of the thickness adjustment slider.

The sliding projection of the present invention can be composed of a carriage and a round pin that is inserted into the carriage. The round pin is simultaneously inserted into the sagittal chute of the anvil frame and the chute of the clamping thickness adjustment slider, and the carriage is constrained within the anvil assembly to move in the sagittal direction of the anvil frame. A spring can be mounted on the carriage. The spring maintains the round pin on the carriage in a sagittal tendency toward the face of the anvil with the staple forming groove.

The clamping thickness adjusting mechanism of the surgical linear cutting stapler of the present invention, because the round pin of the sliding protrusion is simultaneously inserted into the sagittal groove of the anvil frame and the wavy chute of the thickness adjusting slider is clamped, the spring makes the carriage The upper round pin maintains a tendency toward the sagittal movement of the face of the anvil with the staple forming groove, so that the wave shape of the thickness adjustment slider is clamped when the clamping thickness adjustment slider moves in the longitudinal direction of the nail anvil frame Under the action of the chute and the spring, and under the constraint of the sagittal chute of the anvil frame, the lug on the sliding lug jumps in the wavy chute of the clamping thickness adjustment slider, continuously changing the clamping thickness adjustment slider The resistance of the movement along the longitudinal direction of the anvil frame is sounded, and the clamping thickness adjustment mechanism is used to double the function of the operator to clamp the change of the thickness adjustment by the feeling and the sound; on the other hand, the clamping thickness adjustment slider After the longitudinal movement of the anvil frame is completed, under the constraint of the wavy chute of the clamping thickness adjustment slider and the sagittal chute of the anvil frame, and the elastic Under the action of the spring, the projection on the sliding projection is fixed in the adjusted position, and the clamping thickness adjustment mechanism is reached so that the tissue between the cartridge assembly and the anvil assembly is fixed at the position of the adjusted clamping thickness. The effect on the use. DRAWINGS

Figure 1 is a perspective view showing the surgical linear cutting stapler of the present invention when the cartridge assembly and the anvil assembly are in an open state;

Figure 2 is a perspective view showing the surgical linear cutting stapler of Figure 1 when the cartridge assembly and the anvil assembly are in a clamped state;

Figure 3 is a perspective view showing the surgical linear cutting stapler of Figure 1 in a relatively thick clamping state of the cartridge assembly and the anvil assembly;

Figure 4 is a perspective view showing the surgical linear cutting stapler of Figure 1 after being removed from the outer casing;

Figure 5 is a perspective view showing the surgical linear cutting stapler of Figure 2 after being removed from the outer casing;

Figure 6 is a perspective view showing the surgical linear cutting stapler of Figure 3 after being removed from the outer casing;

Figure 7 is an external view showing a cartridge assembly of the surgical linear cutting stapler of the present invention;

Figure 8 is an external view showing a clamp hook of the surgical linear cutting stapler of the present invention;

Figure 9 is an external view showing the clamp hook of Figure 8 removed from the outer casing;

Figure 10 is a perspective view showing the clamp thickness adjusting slider of the present invention at a thicker clamping thickness position on the anvil frame; Figure 11 is an external view showing the anvil assembly of Figure 10 removed from the outer casing;

Figure 12 is an external view showing the nail anvil frame of Figure 10 removed from the attachment;

Figure 13 is an enlarged plan view showing a nail anvil on the anvil of Figure 10;

Figure 14 is an enlarged plan view showing a first type of clamping thickness adjusting slider of the closing groove of Figure 10; Figure 15 is an enlarged external view showing the sliding projection of Figure 10;

Figure 16 is a view showing the appearance of the anvil assembly after the clamping thickness adjustment slider of the present invention is placed in the intermediate clamping thickness position on the anvil frame;

Figure 17 is a perspective view showing the sliding projection of Figure 16 removed;

Figure 18 is a perspective view showing the surgical linear cutting stapler of the present invention after the cartridge assembly and the anvil assembly are in an intermediate clamping thickness state;

Figure 19 is a front elevational view showing the anvil assembly removed from the outer casing when the clamping thickness adjustment slider of the present invention is positioned at a thinner clamping thickness position on the anvil frame;

Figure 20 is a front elevational view showing the sliding projection of Figure 19 removed; Figure 21 is a front elevational view showing the surgical linear cutting stapler of the present invention after the cartridge assembly and the anvil assembly are in a relatively thin clamping thickness state;

Fig. 22 is a perspective view showing a second type of grip thickness adjusting slider in which the chute of the present invention is open. detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the clamping thickness adjusting mechanism of the surgical linear cutting stapler of the present invention will be described by way of example with reference to the accompanying drawings. The scope of the invention is pointed out in the claims. It will be appreciated that some or all of the drawings are illustrative of the preferred embodiment of the invention and are not intended to depict the true dimensions of the illustrated. The practical manner of achieving the above and other objects and advantages of the present invention will become more apparent from the detailed description of the preferred embodiments.

As shown in Fig. 1, the direction 1 indicates the near direction, the direction 2 indicates the far direction, the direction 3 indicates the left direction, the direction 4 indicates the right direction, the direction 5 indicates the upper direction, and the direction 6 indicates the lower side. Direction 1 and direction 2 constitute the longitudinal direction of the surgical linear cutting stapler, direction 3 and direction 4 form the transverse direction of the surgical linear cutting stapler, and direction 5 and direction 6 constitute the sagittal direction of the surgical linear cutting stapler.

The shape and structure of the clamping thickness adjusting mechanism of the surgical linear cutting stapler according to the first embodiment of the present invention will now be described with reference to Figs. 1 to 21, illustrating the action of the clamping thickness adjusting mechanism.

The surgical linear cutting stapler 7 is composed of a cartridge assembly 8, an anvil assembly 9, and a clamping thickness adjustment mechanism 10. As shown in Figs. 1 to 6, the surgical linear cutting stapler 7 is in an open state, a clamped state, and a clamped state, respectively.

As shown in Fig. 7, the cartridge assembly 8 has a staple cartridge 11, a cartridge holder 12 for mounting the staple cartridge 11, and a firing mechanism 13 mounted in the cartridge holder 12. A pusher block (not shown) and a staple (not shown) are attached to the staple cartridge 11. A plurality of staples are staggered in two rows on either side of the staple cartridge sipe 14.

As shown in Figs. 10 to 13, the anvil assembly 9 has an anvil 15 and a nail anvil frame 16. Staple forming grooves 17 corresponding to the positions of the staples in the staple cartridge 11 are arranged on the surface of the anvil 15. A plurality of staple forming grooves 17 are alternately arranged in two rows on both side surfaces of the nail anvil groove 18.

As shown in Figs. 7 to 21, the clamp thickness adjusting mechanism 10 is composed of a magazine holder 12, a nail holder 16, a clamp hook 19, a clamp thickness adjusting slider 20, and a slide projection 21. As shown in Fig. 7, the magazine frame 12 has a pivot 22 and a press block 23. As shown in Figs. 8 and 9, the clamp hook 19 has a pivot hole 24 and a hook 25. The pivot 22 of the cartridge holder 12 is inserted into the pivot hole 24 of the clamping hook 19 to form a pivotal connection of the clamping hook 19 to the cartridge holder 12. As shown in Figures 11 and 12, a longitudinal chute 26 and a sagittal chute 27 are provided on the anvil frame 16. As shown in Fig. 14, the clamp thickness adjusting slider 20 has a stepped projection 28 at the proximal end and a wavy chute 29 at the distal end. The stepped surface of the stepped bump 28 is curved. The projection 30 on the slide projection 21 is restrained in the wavy chute 29 of the clamp thickness adjusting slider 20.

As shown in FIGS. 7 to 21, when the clamping thickness adjustment slider 20 is restrained under the constraint of the longitudinal chute 26 of the anvil frame 16, When the anvil frame 16 is moved longitudinally, the stepped projections 28 and the wavy chutes 29 of the clamp thickness adjusting slider 20 also move in the longitudinal direction of the nail anvil frame 16, so that the wave shape of the thickness adjusting slider 20 is clamped. The chute chute 29 drives the sliding lug 21 to move in the sagittal direction of the anvil frame 16 under the constraint of the sagittal chute 27 of the anvil frame 16. Thereby, the distance between the projection 30 on the sliding projection 21 mounted on the anvil assembly 9 and the pivot 22 on the cartridge holder 12 of the cartridge assembly 8 is adjusted, and the anvil assembly 9 is adjusted. The upper clamping thickness adjusts the distance between the stepped projection 28 of the slider 20 and the clamp 23 on the cartridge holder 12 of the cartridge assembly 8.

As shown in FIGS. 1 to 6, after the cartridge assembly 8 and the anvil assembly 9 are closed to each other, the clamping hook 19 is pivoted about the cartridge holder 12 such that the hook 25 on the clamping hook 19 catches the sliding projection. The bumps 30 on the block 21 drive the pressing blocks 23 on the magazine frame 12 against the projections 30 on the sliding projections 21, so that the cartridge assembly 8 and the anvil assembly 9 are clamped by the clamping hooks.

Since the distance between the pivot hole 24 on the clamping hook 19 and the hook 25 is constant, the clamping thickness adjustment slider 20 adjusts the thickness of the tissue clamped between the cartridge assembly 8 and the anvil assembly 9. . 3, 4, 6, and 10 show that the surgical linear cutting stapler 1 clamps the mutual positions of the components of the thickness adjusting mechanism 10 when the cartridge assembly 8 and the anvil assembly 9 are in a relatively thick clamping state. 16 to 18 show that the surgical linear cutting stapler 1 clamps the mutual positions of the respective parts of the thickness adjusting mechanism 10 when the cartridge assembly 8 and the anvil assembly 9 are in an intermediate clamping state. 19 to 21 show that the surgical linear cutting stapler 1 clamps the mutual positions of the respective parts of the thickness adjusting mechanism 10 when the cartridge assembly 8 and the anvil assembly 9 are in a relatively thin clamping state.

As shown in Fig. 15, the slide projection 21 is composed of a carriage 31 and a round pin 32 inserted in the carriage 31. The round pin 32 is simultaneously inserted into the sagittal chute 27 of the anvil frame 16 and into the undulating chute 29 of the thickness adjustment slider 20, and the carriage 31 is constrained within the anvil assembly 9 along the sagittal movement of the anvil frame 16. . A spring 33 is mounted on the carriage 31. The spring 33 maintains the tendency of the round pin 32 on the carriage 31 toward the sagittal movement of the face of the anvil 15 with the staple forming groove 17.

As shown in Fig. 22, the clamping thickness adjusting slider 34 of the second embodiment of the clamping thickness adjusting mechanism 10 of the surgical linear cutting stapler 7 of the present invention has a stepped projection 35 at its proximal end and a stepped distal end. Shaped chute 36. The stepped surface of the stepped bump 35 is flat. The clamping thickness adjustment slider 34 functions and clamps in the thickness of the clamped tissue between the adjustment cartridge assembly 8 and the anvil assembly 9 in the clamping thickness adjustment mechanism 10 in the surgical linear cutting stapler 7. The tight thickness adjustment slider 20 is the same.

According to the above detailed description, the clamping thickness adjusting mechanism of the surgical linear cutting stapler of the present invention has the following technical effects as compared with the existing various surgical linear cutting staplers:

Most of the existing surgical linear cutting staplers, in order to achieve the purpose of the organization of the anastomosis, for different clamping thickness of the tissue to be anastomosis need to use different staple height of the staples and staples of different heights. Since the tissue to be anastomosis is soft and elastic, it is difficult to determine the thickness of the appropriate anastomosis tissue, and it is necessary to replace and select various clamping thicknesses during surgery. The staple cartridge of the nail height is generally divided into a specification every 0.5 mm, which increases the number of surgical operations and the cost of the instrument. Therefore, the surgical linear cutting stapler of this type is difficult to satisfy each The surgical requirements of the thickness of the tissue to be anastomosed reduce the surgical effect, increase the difficulty of surgery and the cost of surgery.

In recent surgical linear cutting staplers, the clamping thickness adjustment mechanism requires simultaneous adjustment of the sagittal position of the anvil and platen when adjusting the clamping thickness. Wherein, in adjusting the sagittal position of the anvil board, a stepped adjustment plate needs to be inserted into the anvil to support the stepped nail cutting board with the forming groove. The unsatisfactory aspect of the clamping thickness adjustment mechanism of this type of surgical linear cutting stapler is: First, the anvil of the surgical linear cutting stapler is elongated, and the stepped adjustment plate is inserted into the anvil When the stepped nail cutting plate with the forming groove adjusts the sagittal position of the nail cutting plate, it will be subjected to a large resistance, which is not convenient for the operation; second, when the stepped adjusting plate holds the stepped shape with the forming groove When the cutting board is nailed, a large cavity is formed at each stepped interval of the adjusting plate and the nail cutting plate, so that when the nail tip of the staple is pressed against the forming groove of the anvil, the two nail legs are bent along the forming groove. The generated force will cause the nail anvil to bend and deform, affecting the correct formation of the staple, that is, affecting the surgical effect of the tissue anastomosis; Third, in order to support the stepped adjustment plate to the stepped nail anvil with the forming groove The sagittal position of the anvil board has two guiding grooves on each side of the anvil, and the guiding groove has a sagittal moving pin, and the guiding groove and the sagittal moving pin will scratch the surrounding tissue; Since the clamping mechanism of the cartridge assembly and the anvil assembly is a cantilever structure, the adjustment plate and the anvil plate occupy a large space in the anvil, and the rigidity of the anvil weakened by the adjustment plate and the anvil plate is increased, and the rigidity is increased. The width and height of the anvil increase the weight of the anvil and increase the volume of the anvil, which is easy to cause operational fatigue and reduce the surgical adaptation range of the surgical linear cutting stapler.

The clamping thickness adjusting mechanism of the surgical linear cutting stapler of the invention realizes that when the clamping thickness adjusting slider moves along the longitudinal direction of the nail anvil frame, the protrusions and the chutes of the clamping thickness adjusting slider are also along the anvil The longitudinal movement of the frame causes the chute of the clamping thickness adjustment slider to move the sliding projection along the sagittal direction of the anvil frame under the constraint of the sagittal chute of the anvil frame, thereby adjusting the sliding convexity mounted on the anvil assembly The distance between the bump on the block and the pivot on the magazine frame of the cartridge assembly adjusts the bump of the clamping thickness adjustment slider mounted on the anvil assembly and the cartridge holder of the cartridge assembly The distance between the briquettes. Since the distance between the pivot hole on the clamping hook and the hook is constant, the clamping thickness adjustment mechanism achieves the effect of adjusting the thickness of the tissue clamped between the cartridge assembly and the anvil assembly. If the number of steps of the chute on the thickness adjustment slider is increased, or the number of waves is increased, the more the number of steps of the bump on the thickness adjustment slider is, the between the cartridge assembly and the anvil assembly The more the thickness of the tissue that can be clamped, the more the number of separations can be adjusted. Since the clamping thickness adjustment mechanism moves on the anvil frame other than the anvil, neither occupying any position within the anvil nor changing the structure of the anvil, the tissue between the adjustment cartridge assembly and the anvil assembly is When clamping the thickness, the resistance is small, the width and height of the anvil are not increased, and the rigidity and strength of the anvil are not affected, and there is no accessory structure that will scratch the surrounding tissue. Compared with the existing surgical linear cutting stapler, the surgical linear cutting stapler of the present invention is lighter and more reliable, and does not reduce the hand of the surgical linear cutting stapler. The scope of adaptation has improved the surgical results of tissue anastomosis.

The clamping thickness adjusting mechanism of the surgical linear cutting stapler of the present invention, because the round pin of the sliding protrusion is simultaneously inserted into the sagittal groove of the anvil frame and the wavy chute of the thickness adjusting slider is clamped, the spring makes the carriage The upper round pin maintains a tendency toward the sagittal movement of the face of the anvil with the staple forming groove, so that the wave shape of the thickness adjustment slider is clamped when the clamping thickness adjustment slider moves in the longitudinal direction of the nail anvil frame Under the action of the chute and the spring and under the constraint of the sagittal chute of the anvil frame, the lug on the sliding lug jumps in the wavy chute of the clamping thickness adjusting slider, continuously changing the clamping thickness adjustment slider along the edge The resistance of the longitudinal movement of the anvil frame and the sound, compared with the existing surgical linear cutting stapler, the surgical linear cutting stapler of the present invention reaches the clamping thickness adjusting mechanism to remind the operator to clamp by feeling and sounding a better use effect of the change in thickness adjustment; on the other hand, after the clamping thickness adjustment slider is moved along the longitudinal movement of the anvil frame, the thickness adjustment slider is clamped Under the action of the wavy chute and the spring and the sagittal chute of the anvil frame, the lug on the sliding lug is fixed in the adjusted position compared with the existing surgical linear cutting stapler. The inventive surgical linear cutting stapler achieves a better use of the clamping thickness adjustment mechanism such that the tissue between the cartridge assembly and the anvil assembly is fixed at the position of the adjusted clamping thickness.

When using the surgical linear cutting stapler of the present invention, the surgeon does not need to use staples of different staple heights for the different thickness of the tissue to be anastomosed, and only need to use the staples with the same nail height. The same staple warehouse. Firstly, the tissue to be anastomosed is clamped between the staple cartridge and the anvil; if the clamping thickness is not suitable, the clamping thickness adjustment mechanism is affected by the thickness of the tissue clamped between the adjustment cartridge assembly and the anvil assembly. The resistance is small, and it is not necessary to loosen the surgical linear cutting stapler, and only the cartridge assembly and the anvil assembly of the surgical linear cutting stapler are in the clamping state shown in FIG. 2, that is, the clamping thickness adjusting mechanism can be directly adopted. Adjusting the clamping gap between the cartridge assembly and the anvil assembly, and the clamping thickness adjustment mechanism doubles the feeling of occurrence and sound when the clamping thickness adjustment mechanism adjusts the clamping gap between the cartridge assembly and the anvil assembly The operator notices the change in the clamping thickness adjustment; then tries to clamp the tissue to be anastomosed until it is satisfactory; at this point, the staple can be pushed out of the staple cartridge through the firing mechanism to penetrate the staple tip of the staple The clamped tissue to be anastomosed directly against the forming groove on the anvil to achieve the surgical purpose of anastomosis of the tissue. When used in surgery, the surgical linear cutting stapler of the present invention is lighter, more reliable, and does not reduce the surgical adaptation range of the surgical linear cutting stapler, and the operation time is more than that of the existing surgical linear cutting stapler. Short, improves the surgical results of tissue anastomosis.

Thus, it can be seen that the above stated objectives, including those shown by the foregoing description, are effectively achieved. The present invention is intended to be illustrative of the preferred embodiments of the present invention. The present invention is not limited to or limited to the specific details set forth herein, and any modifications or variations that are obvious to those skilled in the art will be apparent as set forth in the claims.

Claims

Claim

A clamping thickness adjusting mechanism for a surgical linear cutting stapler, the surgical linear cutting stapler comprising a staple cartridge assembly, an anvil assembly and the clamping thickness adjustment mechanism;

The staple cartridge assembly is provided with a staple cartridge, a staple cartridge holder for mounting the staple cartridge, and a firing mechanism installed in the staple cartridge holder, the staple cartridge is linear, and a push nail is installed in the staple cartridge a block and a plurality of staples, the plurality of staples being staggered in two or more rows in the staple cartridge;

The anvil assembly is provided with an anvil and a nail anvil having the anvil, the anvil is linear, and a plurality of staple forming corresponding to the position of the staple in the staple cartridge are arranged on the surface of the anvil a groove, the plurality of staple forming grooves are staggered in two rows or more on the surface of the anvil;

The utility model is characterized in that: the clamping thickness adjusting mechanism comprises a nail cartridge frame, a nail anvil frame, a clamping hook, a clamping thickness adjusting slider and a sliding convex block, wherein the nail loading frame is provided with a pivot shaft and a pressing block, The clamping hook is provided with a pivot hole and a hook, and the pivot of the nail cartridge frame is inserted into the pivot hole of the clamping hook to form a pivotal connection between the clamping hook and the nail cartridge frame, in the nail anvil frame a longitudinal chute and a sagittal chute are disposed, the proximal end of the clamping thickness adjusting slider is provided with a convex block, and the distal end is provided with a chute, and the convex block on the sliding convex block is restrained at the clamping thickness Adjust the inside of the chute of the slider;

When the clamping thickness adjusting slider moves in the longitudinal direction of the nail anvil frame under the constraint of the longitudinal sliding groove of the nail anvil frame, the convexity and the inclined groove of the clamping thickness adjusting slider also follow the nail anvil frame The longitudinal movement of the clamping groove of the clamping thickness adjusting slider moves the sagittal direction of the anvil frame under the constraint of the sagittal sliding groove of the anvil frame to adjust the sliding convexity mounted on the anvil assembly The purpose of the distance between the bump on the block and the pivot on the magazine frame of the cartridge assembly, and also to adjust the projection of the clamp and the cartridge assembly of the clamping thickness adjustment slider mounted on the anvil assembly The purpose of the distance between the briquettes on the warehouse rack;

After the staple cartridge assembly and the anvil assembly are closed to each other, the clamping hook is pivoted around the staple cartridge frame such that the hook on the clamping hook hooks the projection on the sliding projection to drive the The pressure block on the magazine frame is pressed against the projection on the sliding projection, so that the cartridge assembly and the anvil assembly are clamped by the clamping hook, since the distance between the pivot hole and the hook on the clamping hook is constant Thus, the clamping thickness adjustment mechanism adjusts the thickness at which the tissue between the cartridge assembly and the anvil assembly is clamped.

2. The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 1, wherein the chute on the clamping thickness adjusting slider has a stepped shape.

3. The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 1, wherein the chute on the clamping thickness adjusting slider has a wave shape.

4. The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 1, wherein The bumps on the clamping thickness adjustment slider are stepped.

The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 4, wherein the step surface of the stepped projection on the clamping thickness adjusting slider is curved.

6. The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 1, wherein the sliding protrusion is a round pin, and the round pin is simultaneously inserted into the sagittal sliding groove of the anvil frame. And the clamping thickness adjusts the slider in the chute.

7. The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 1, wherein the sliding protrusion is composed of a carriage and a round pin inserted on the carriage, the round pin Simultaneously inserted into the sagittal chute of the anvil frame and within the chute of the clamping thickness adjustment slider, the carriage is constrained within the anvil assembly to move in a sagittal direction along the anvil frame.

8. The clamping thickness adjusting mechanism of the surgical linear cutting stapler according to claim 7, wherein the carriage is mounted with a spring, the spring holding the round pin on the carriage toward the The tendency of the sagittal movement of the face of the anvil with the staple forming groove.