CN120814863A

CN120814863A - A laparoscopic stapler

Info

Publication number: CN120814863A
Application number: CN202510958573.3A
Authority: CN
Inventors: 杜建军; 刘俊杰
Original assignee: Huashan Hospital of Fudan University
Current assignee: Huashan Hospital of Fudan University
Priority date: 2025-07-11
Filing date: 2025-07-11
Publication date: 2025-10-21

Abstract

The present invention relates to the technical field of medical devices. The present invention discloses a laparoscopic stapler, comprising an angle adjustment mechanism and a firing assembly, a rotating mechanism, a first connecting rod, a second connecting rod, and a stapling assembly connected in sequence; the stapling assembly is arranged at one end of the second connecting rod and is used to cooperate with a pintle to complete the stapling operation; the firing assembly is connected to the stapling assembly and is used to control the stapling assembly to perform the stapling operation; the first connecting rod is rotatably connected to the other end of the second connecting rod; the rotating mechanism is connected to the second connecting rod and is used to drive the second connecting rod to rotate; the angle adjustment mechanism is arranged on the rotating mechanism and is connected to the second connecting rod and is used to drive the second connecting rod to swing so as to adjust the angle between the second connecting rod and the first connecting rod. The present invention can improve the operational flexibility and stapling accuracy in the narrow space of the abdominal cavity.

Description

Anastomat for endoscope

Technical Field

The invention relates to the technical field of medical instruments, in particular to an anastomat for an endoscope.

Background

The laparoscopic surgery technique is widely developed in clinic, and when performing digestive tract reconstruction surgery, a staple supporting seat is required to be fixed at the broken end of a digestive tract on one side through purse string suture, an anastomat is placed into the lumen of the digestive tract on the other side, and the anastomat is fired after being connected with the staple supporting seat so as to realize digestive tract anastomosis. However, in laparoscopic surgical procedures, due to the limited space available for intra-abdominal procedures, particularly when the anastomotic site is located deep in the abdomen and pelvis, the conventional stapler structure lacks flexible angular adjustment and rotation functions, resulting in difficulty in removing the protector from the central shaft of the circular stapler, and difficulty in accurately positioning and connecting the abutment. Meanwhile, the connecting rod of the traditional anastomat is large in diameter and stiff in structure, not only shields the operation vision, but also easily shifts in position in the adjusting process, and the risks of anastomotic failure and anastomotic stoma fistula are increased.

Therefore, there is a need to provide a stapler for a endoscope to solve the above problems.

Disclosure of Invention

The invention aims to provide an anastomat for a cavity mirror, which can improve the operation flexibility and the anastomosis accuracy in a narrow space of an abdominal cavity.

In order to solve the technical problems, the invention provides an anastomat for a cavity mirror, which comprises an angle adjusting mechanism, a firing assembly, a rotating mechanism, a first connecting rod, a second connecting rod and an anastomotic assembly which are sequentially connected;

The stapling assembly is arranged at one end of the second connecting rod and used for being matched with the stapling seat to complete stapling operation, the firing assembly is connected with the stapling assembly and used for controlling the stapling assembly to execute stapling operation, the first connecting rod is rotationally connected with the other end of the second connecting rod, the rotating mechanism is connected with the second connecting rod and used for driving the second connecting rod to rotate, and the angle adjusting mechanism is arranged on the rotating mechanism and connected with the second connecting rod and used for driving the second connecting rod to swing so as to adjust an included angle between the second connecting rod and the first connecting rod.

Further, the angle adjusting mechanism comprises a steering knob, a steering shaft, a limiting assembly, a gear, a first rack and a second rack;

The steering mechanism comprises a steering knob, a limiting assembly, a steering shaft, a gear, a limiting assembly and a control device, wherein the steering knob is arranged on the rotating mechanism and is positioned outside the rotating mechanism;

The gear is rotationally connected to the inner wall of the rotating mechanism, two sides of the gear are respectively meshed with the first rack and the second rack, the first rack and the second rack are axially and slidably arranged in the rotating mechanism and extend into the first connecting rod, the first connecting rod is rotationally connected with the second connecting rod through a hinge plate, the hinge plate is arranged at the center of the end part of the second connecting rod, the first rack and the second rack are respectively rotationally connected with two ends of the hinge plate, and the first rack and the second rack axially and relatively move.

Further, the limiting assembly comprises a limiting disc, a limiting piece, a limiting rod and an elastic piece;

The steering device comprises a steering shaft, a limiting disc, a limiting rod, an elastic piece, a limiting piece, a plurality of tooth grooves, a sliding groove, a limiting rod and a limiting rod, wherein the limiting disc is arranged in the rotating mechanism, the steering shaft penetrates through the limiting disc, the inner side wall of the limiting disc is provided with the plurality of tooth grooves, the limiting piece is sleeved on the steering shaft, the limiting piece is provided with the sliding groove along the direction perpendicular to the steering shaft, one end of the limiting rod is elastically arranged in the sliding groove through the elastic piece, and the other end of the limiting rod extends into the tooth grooves under the elastic action of the elastic piece.

Further, the limiting disc is an annular disc, the tooth grooves are formed in the inner side wall of one part of the limiting disc, the radial dimension of the center position of the limiting disc from the outer edge of the tooth grooves is larger than the inner diameter dimension of the limiting disc, and the length dimension of the limiting piece is larger than the inner diameter dimension of the limiting disc and smaller than the radial dimension of the center position of the limiting disc from the outer edge of the tooth grooves.

Further, the rotating mechanism comprises a rotating shell, a rotating control piece and a rotating sleeve shaft;

The two ends of the rotary shell are respectively and rotatably connected with the first connecting rod and the firing assembly, the rotary control piece is coaxially and fixedly arranged in the rotary shell, one end of the rotary sleeve shaft is connected with the rotary control piece, the other end of the rotary sleeve shaft penetrates through the first connecting rod, the end part, close to the first connecting rod, of the second connecting rod is connected with a rotating plate, the rotating plate is connected with the hinge plate, and the other end of the rotary sleeve shaft surrounds the rotating plate and is rotatably connected with the rotating plate.

Further, the diameter of the second connecting rod is smaller than that of the first connecting rod.

Further, the outer side wall of the second connecting rod is coated with an anti-skid coating, and a plurality of annular grooves are formed in the outer side wall of the second connecting rod.

Further, a safety device is arranged on the firing assembly.

Further, the end part of the firing component, which is far away from the rotating mechanism, is connected with a handle, and the opposite side surfaces of the handle are provided with indicators.

The rotary type stapler is characterized by further comprising an elastic center rod, wherein the end part of the handle, which is far away from the firing assembly, is rotationally connected with an adjusting knob, the adjusting knob is connected with one end of the center rod, the other end of the center rod sequentially penetrates through the centers of the handle, the firing assembly, the rotating mechanism, the first connecting rod, the second connecting rod and the stapling assembly and is connected with a protective shell, the protective shell is attached to the end face, which is far away from the second connecting rod, of the stapling assembly, the adjusting knob is rotated to drive the other end of the center rod to extend out of or retract into the stapling assembly, and when the protective shell is removed and the center rod extends out, the other end of the center rod is used for being connected with a stapling seat.

Through the technical scheme, the invention has the following beneficial effects:

Through setting up angle adjustment mechanism on rotary mechanism to be connected with the second connecting rod, make the second connecting rod can realize swing and rotatory combined action, not only can nimble contained angle between second connecting rod and the head rod, can also drive the second connecting rod and rotate around self axis. The arrangement ensures that the anastomat has higher operation freedom degree in a narrow space of the cavity, a doctor can quickly and accurately adjust the position and the direction of the anastomotic assembly, and is convenient for removing a protector on the central rod of the circular anastomat and closing the nail abutting seat in place, thereby shortening the operation time and reducing the operation risk.

In addition, through the linear arrangement of the firing assembly, the angle adjusting mechanism and the rotating mechanism, the connection among the mechanisms is more compact and reliable, and the problem that the traditional anastomat is easy to shake after angle adjustment is avoided. Meanwhile, the diameter of the connecting rod is reduced through the structural design of sequential connection, the operation visual field can be improved, and the accuracy and the operation effect of anastomosis operation are improved.

Drawings

FIG. 1 is a schematic perspective view of a endoscopic stapler according to an embodiment of the present invention;

FIG. 2 is a top view of the endoscopic stapler according to an embodiment of the present invention, looking down from directly above the steering button;

FIG. 3 is a schematic view of an angle adjusting mechanism of the endoscopic stapler according to an embodiment of the present invention;

FIG. 4 is a schematic view of a limiting assembly of a laparoscopic stapler according to an embodiment of the present invention;

FIG. 5 is a front view of a laparoscopic stapler according to an embodiment of the present invention;

FIG. 6 is a schematic diagram showing a specific structure of a connection portion between the first connecting rod and the second connecting rod in FIG. 5A;

fig. 7 is a schematic view of a structure of an anastomat for endoscope performing an anastomosis operation on a cancellation tube according to an embodiment of the present invention.

In the figure, 1, an angle adjusting mechanism, 11, a steering knob, 12, a steering shaft, 13, a limiting assembly, 131, a limiting piece, 132, a limiting disc, 1320, a tooth socket, 133, a limiting rod, 134, an elastic piece, 14, a gear, 15, a first rack, 16, a second rack, 17, a hinge plate, 18 and a transmission rod;

2. A rotation mechanism; 21, a rotary shell, 22, a rotary control member, 23, a rotary sleeve shaft, 24 and a rotary plate;

3. A firing assembly;

4. a safety device;

51. 52, the second connecting rod;

6. An anastomosis assembly;

7. a nail supporting seat;

8. an adjustment knob;

9. 91, protective housing;

10. a grip;

100. Sealing cover;

200. A digestion conduit;

300. a cloth belt.

Detailed Description

Based on the teachings of this specification, a person skilled in the art may form a new technical solution by cross-combining different embodiments without technical contradiction, and such modifications should be considered as falling within the protection scope of this patent.

A laparoscopic stapler of the present invention will be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown, it being understood that the present invention described herein can be modified by those skilled in the art, while still achieving the advantageous effects of the present invention. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the invention.

The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.

Referring to fig. 1, 2, 5 and 7, an embodiment of the present invention provides a surgical stapler, which includes an angle adjusting mechanism 1, and a firing assembly 3, a rotating mechanism 2, a first connecting rod 51, a second connecting rod 52 and a stapling assembly 6 sequentially connected.

Specifically, the anastomotic assembly 6 is arranged at one end of the second connecting rod 52 and is used for being matched with the nail abutting seat 7 to complete anastomotic operation, the firing assembly 3 is connected with the anastomotic assembly 6 and is used for controlling the anastomotic assembly 6 to execute anastomotic operation, the first connecting rod 51 is rotationally connected with the other end of the second connecting rod 52, the rotating mechanism 2 is connected with the second connecting rod 52 and is used for driving the second connecting rod 52 to rotate, and the angle adjusting mechanism 1 is arranged on the rotating mechanism 2 and is connected with the second connecting rod 52 and is used for driving the second connecting rod 52 to swing so as to adjust an included angle between the second connecting rod 52 and the first connecting rod 51. The structure can improve the operation flexibility in the narrow space of the abdominal cavity, so that the surgical instrument can better adapt to the requirements of different surgical sites.

Wherein, the anastomotic component 6 comprises a cutter and a nail bin (not shown in the figure), a plurality of rows of annularly arranged nail grooves are arranged in the nail bin, and anastomotic nails are arranged in each nail groove. Those skilled in the art will appreciate that the number of rows of staples in the cartridge can be set as desired and that embodiments other than the present embodiment are contemplated.

In this embodiment, the stapling assembly 6 cooperates with the anvil 7 to complete the stapling operation. When the distance between the two is in place, the digestive tract 200 tissue is sufficiently pressed between the stapling assembly 6 and the anvil 7. After firing, the cutting knife completes annular excision of the tissue, and simultaneously the anastomotic staples in the staple cartridge are sequentially ejected and matched with the staple supporting seat 7, so that the broken end tissue is reliably anastomosed.

In one embodiment, as shown in fig. 2-4, the angle adjustment mechanism 1 includes a steering knob 11, a steering shaft 12, a limit assembly 13, a gear 14, a first rack 15, and a second rack 16.

Specifically, the steering knob 11 is arranged on the rotating mechanism 2 and is positioned outside the rotating mechanism 2, the steering shaft 12 is positioned in the rotating mechanism 2, one end of the steering shaft is connected with the steering knob 11, the other end of the steering shaft is fixedly connected with the center position of the gear 14, the limiting component 13 is positioned in the rotating mechanism 2 and is connected with the steering shaft 12 for limiting the rotating angle of the steering knob 11, the gear 14 is rotatably connected to the inner wall of the rotating mechanism 2, two sides of the gear are respectively meshed with the first rack 15 and the second rack 16, the first rack 15 and the second rack 16 are axially and slidably arranged in the rotating mechanism 2 and extend into the first connecting rod 51, the first connecting rod 51 is rotatably connected with the second connecting rod 52 through the hinge plate 17, the hinge plate 17 is installed at the center position of the end of the second connecting rod 52, the first rack 15 and the second rack 16 are respectively rotatably connected with two ends of the hinge plate 17, and the first rack 15 and the second rack 16 are axially and relatively moved along the second rack 16. Through this structure setting, can realize the accurate control of angle modulation, avoid the position offset in the adjustment process, improve the security of operation. And the transmission structure design ensures that the angle adjustment is more stable and reliable, the mechanical impact in the adjustment process can be reduced, and the service life of the instrument is prolonged.

Wherein, the first rack 15 and the second rack 16 are respectively connected with a transmission rod 18, and one ends of the two transmission rods 18 far away from the first rack 15 and the second rack 16 are respectively connected with two ends of the hinge plate 17 in a rotating way.

Preferably, the outer surface of the steering knob 11 is provided with anti-slip lines, so that the operation of operators is facilitated.

Preferably, the gear 14 is made of wear-resistant alloy material, so that the service life can be prolonged.

Preferably, the hinge plate 17 is made of a high-strength titanium alloy material, so that the structural strength and the service life can be improved.

In this embodiment, with continued reference to fig. 4, the limiting assembly 13 includes a limiting plate 132, a limiting member 131, a limiting rod 133, and an elastic member 134.

Specifically, the limiting disc 132 is installed in the rotation mechanism 2, the steering shaft 12 passes through the limiting disc 132, a plurality of tooth grooves 1320 are formed in the inner side wall of the limiting disc 132, the limiting piece 131 is sleeved on the steering shaft 12, a sliding groove is formed in the limiting piece 131 along the direction perpendicular to the steering shaft 12, one end of the limiting rod 133 is elastically installed in the sliding groove through the elastic piece 134, and the other end of the limiting rod extends into the tooth grooves 1320 under the elastic action of the elastic piece 134. The embodiment not only can improve the positioning accuracy of angle adjustment, but also can strengthen the stability of the adjustment process and prevent unexpected angle offset.

Preferably, a plurality of evenly distributed tooth slots 1320 are provided on the inner side wall of the limiting plate 132, and the number of the tooth slots 1320 can be set according to actual needs.

Preferably, the elastic member 134 is a stainless steel spring, which has good elastic properties and corrosion resistance.

In a specific example, the limiting plate 132 is an annular disc, the tooth slots 1320 are formed in a part of the inner side wall of the limiting plate 132, the radius of the center position of the limiting plate 132 from the outer edge of the tooth slots 1320 is larger than the inner diameter of the limiting plate 132, and the length of the limiting member 131 is larger than the inner diameter of the limiting plate 132 and smaller than the radius of the center position of the limiting plate 132 from the outer edge of the tooth slots 1320.

For example, the limiting plate 132 may be made of high-strength engineering plastic with an inner diameter of 15mm and an outer diameter of 30mm, and the slots 1320 have a depth of 2mm and a width of 1.5mm. The length of the limiting piece 131 is 20mm, and the size design can achieve the limiting function and avoid interference with other components. The size matching relation not only effectively realizes the limiting function, but also can optimize the space layout among parts and improve the compactness of the whole structure. It will be appreciated by those skilled in the art that the specific dimensions described above are for illustration only and that the specific dimensions may be set according to the actual circumstances.

In this embodiment, when the angle between the second connecting rod 52 and the first connecting rod 51 needs to be adjusted, the steering shaft 12 is driven to rotate by rotating the steering knob 11. The steering shaft 12 is fixedly connected with the gear 14 to rotate the gear 14. When the gear 14 rotates, the first rack 15 and the second rack 16 engaged with both sides thereof move relatively in the axial direction. Because the first rack 15 and the second rack 16 are respectively connected with two ends of the hinge plate 17 in a rotating way, and the hinge plate 17 is arranged at the center of the end part of the second connecting rod 52, the relative movement of the racks drives the hinge plate 17 to rotate, and the hinge plate 17 rotates to drive the second connecting rod 52 to swing around the end part of the first connecting rod 51, so that the included angle between the two connecting rods is changed. In the adjusting process, the limiting rod 133 in the limiting assembly 13 is meshed with the tooth grooves 1320 of the limiting disc 132 under the action of the elastic piece 134, so that each time of adjusting the angle can be accurately positioned, and accidental displacement is prevented.

In one embodiment, as shown in fig. 5-6, the rotary mechanism 2 includes a rotary housing 21, a rotary control 22, and a rotary sleeve shaft 23.

Specifically, the two ends of the rotary housing 21 are respectively and rotatably connected with the first connecting rod 51 and the firing assembly 3, the rotary control member 22 is coaxially and fixedly installed in the rotary housing 21, one end of the rotary sleeve shaft 23 is connected with the rotary control member 22, the other end passes through the first connecting rod 51, the end, close to the first connecting rod 51, of the second connecting rod 52 is connected with a rotating plate 24, the rotating plate 24 is connected with the hinge plate 17, and the other end of the rotary sleeve shaft 23 surrounds the rotating plate 24 and is rotatably connected with the rotating plate 24. The structure of the embodiment not only can realize the rotation function of the head end of the anastomat, but also can enhance the stability and controllability of the rotation process.

Preferably, the rotary housing 21 is made of medical grade stainless steel material, and the surface is treated with special treatment to have good biocompatibility. Can effectively avoid bad stimulation to human tissues during operation, reduce the occurrence risk of postoperative complications and improve the safety of operation.

Preferably, the outer surface of the rotary housing 21 is provided with anti-slip lines. The operator can conveniently perform rotation control from any angle, and the flexibility of operation is improved. The anti-skid lines on the outer surface can increase friction force, and stable and reliable operation can be ensured even under the condition that the glove is stained with body fluid in the operation process.

Preferably, the rotary sleeve shaft 23 is hollow, so that the central rod 9 can pass through the rotary sleeve shaft conveniently, and the outer diameter of the rotary sleeve shaft is in clearance fit with the inner diameter of the first connecting rod 51, so that the rotary sleeve shaft is flexible and can prevent shaking.

In this embodiment, the diameter of the second connecting rod 52 is smaller than the diameter of the first connecting rod 51. Preferably, the outer side wall of the second connecting rod 52 is coated with an anti-slip coating, and the outer side wall of the second connecting rod 52 is provided with a plurality of annular grooves, so that the cloth belt 300 can be conveniently tied and bound to fix the broken end of the digestion pipeline 200 on the circular anastomat. The connection part between the second connecting rod 52 and the kiss cutting assembly can adopt a curvature smooth streamline design, and the diameter of the second connecting rod 52 is smaller than that of the first connecting rod 51, so that shielding of the surgical visual field can be effectively reduced. The present embodiment not only can increase the friction between the inner wall of the digestive tract 200 and the anastomat, but also can significantly reduce the sliding of the digestive tract 200 relative to the front end of the anastomat during the anastomosis process, thereby improving the anastomosis quality. Therefore, this embodiment not only can reduce the shielding to the operation field of vision, improves the accuracy nature of operation, and the setting of anti-skidding coating and annular groove can also strengthen the fixed reliability of digestive tract 200 simultaneously, reduces the risk of operation complication.

Preferably, the anti-slip coating is made of medical grade silica gel material, so that the anti-slip effect can be improved.

In the present embodiment, the rotation mechanism 2 is operated by cooperation of the rotation housing 21, the rotation control member 22, and the rotation sleeve shaft 23. When the direction of the head end of the anastomat needs to be adjusted, the rotary control piece 22 is rotated, and the rotary control piece 22 and the rotary shell 21 are coaxially and fixedly arranged, so that the rotary shell 21 is driven to integrally rotate. One end of the rotary sleeve shaft 23 is connected to the rotary control member 22 and the other end is rotatably connected to the rotary plate 24 around the rotary plate 24 so as to transmit the rotary motion to the head end of the stapler, enabling the stapling assembly 6 to be rotated.

In one embodiment, the firing assembly 3 is provided with a safety device 4. In a specific example, the safety device 4 includes a safety switch and a locking mechanism, the safety switch may be disposed on the surface of the firing assembly 3 in a sliding structure, and the locking mechanism and the firing assembly 3 may be driven to release the locking state by pushing the safety switch. The provision of the safety device 4 forms a double protection mechanism for the firing operation. Under the state of not relieving the insurance, the anastomat can not be started even if the trigger assembly 3 is touched by mistake, and the false trigger caused by misoperation or other unexpected situations of doctors is effectively prevented, so that the operation safety is obviously improved.

In one embodiment, the end of the firing assembly 3 remote from the rotary mechanism 2 is connected with a handle 10, and the opposite sides of the handle 10 are provided with indicators. The indicator can be in a scale display mode, the scale interval is 1mm, the total stroke is 40mm, and the opening and closing distance of the anastomat can be visually displayed. The setting can improve the operation safety, is convenient for the operator to observe the anastomotic distance indication from different angles, and improves the convenience of operation.

In the present embodiment, the firing module 3 is provided with a safety device 4, and the firing operation cannot be performed in the un-armed state, thereby preventing the erroneous operation. When the anastomosis operation is required, the indicators on both sides of the grip 10 are first observed to confirm that the distance between the anastomosis assembly 6 and the anvil 7 is appropriate. After the safety device 4 is released, the percussion assembly 3 is gripped to drive the cutting knife and the nail bin in the anastomosis assembly 6 to complete cutting and nailing operations.

In addition, the embodiment further comprises a center rod 9 with elasticity, an adjusting knob 8 is rotatably connected to the end of the grip 10 far away from the firing assembly 3, the adjusting knob 8 is connected with one end of the center rod 9, the other end of the center rod 9 sequentially penetrates through the centers of the grip 10, the firing assembly 3, the rotating mechanism 2, the first connecting rod 51, the second connecting rod 52 and the anastomotic assembly 6 and is connected with a protective shell 91, the protective shell 91 is attached to the end face of the anastomotic assembly 6 far away from the second connecting rod 52, the other end of the center rod 9 is driven to extend out of or retract into the anastomotic assembly 6 by rotating the adjusting knob 8, and when the protective shell 91 is detached and the center rod 9 extends out, the other end of the center rod 9 is used for being connected with the nail abutting seat 7. The elastic nature of the central rod 9 allows a reliable connection to the abutment 7 to be maintained at all angles.

Preferably, the central rod 9 is made of super-elastic nickel-titanium alloy material, and has good elastic deformability and shape memory effect. The central rod 9 has a diameter of 2mm and its elastic modulus ensures that it returns to its original shape after bending deformation.

In this embodiment, when the second connecting rod 52 swings, the central rod 9 is elastically deformed, and can be restored after being straightened. The expansion and contraction of the center rod 9 can be controlled through the adjusting knob 8, when the center rod 9 needs to be connected with the nail supporting seat 7, the adjusting knob 8 is unscrewed to enable the center rod 9 to extend, and after connection is completed, the center rod 9 is retracted and fixed by screwing the adjusting knob 8.

In this embodiment, as shown in fig. 7, in a specific working procedure, the endoscopic stapler of this embodiment is first placed into the abdominal cavity through the central hole of the sealing cover 100 (for example, patent No. ZL 202122038968.1) in which the endoscopic surgical instrument is placed. The specific operation steps are as follows:

Firstly, placing the anastomat (i.e. the anastomat for the endoscope) into the lumen of a digestive tract 200 at one side to be anastomosed, and using a cloth belt 300 to tie up and fix the broken end of the digestive tract 200 on the anastomat by utilizing the design of an anti-slip coating and an annular groove outside the second connecting rod 52. This arrangement can significantly increase the friction between the inner wall of the alimentary canal 200 and the stapler, effectively reducing slippage of the alimentary canal 200 relative to the front end of the stapler during anastomosis.

Then the adjusting knob 8 is opened to unscrew the central rod 9 of the anastomat, the T-shaped tube of the protector (namely the protective shell 91 of the embodiment) is sleeved in, the adjusting knob 8 is tightened, the central rod 9 is retracted, and the anastomat is placed into the abdominal cavity.

Under the direct view of the laparoscope, the angle between the first connecting rod 51 and the second connecting rod 52 is adjusted and changed by rotating the steering knob 11, and at this time, the inner central rod 9 is elastically deformed and bent. Because the diameter of the second connecting rod 52 is obviously smaller than that of the first connecting rod 51 and the connecting rod of the conventional anastomat in the market (about 1-2 cm), and the connecting part of the distal end and the anastomotic assembly 6 adopts a curvature smooth streamline design, the shielding of the endoscopic surgery field in the surgery is effectively prevented. The direction of the head end of the anastomat is further adjusted by the rotating mechanism 2 so as to be at the optimal operation position.

When the head end of the anastomat is adjusted to a required direction, the adjusting knob 8 is opened, the central rod 9 of the anastomat is screwed out, the T-shaped tube on the central rod 9 is removed, the central rod 9 is connected with the nail supporting seat 7 which is arranged on the broken end of the digestive tract 200 at the other side and is fixed by purse string suture in advance, and then the steering knob 11 is rotated to reset the connecting rod to an initial state. By screwing the adjusting knob 8 and observing the indicators on the two sides of the grip 10 (the double-side design is convenient for operators to observe the anastomotic distance at different positions), when the distance between the anastomotic assembly 6 and the nail supporting seat 7 reaches the proper position, the intestinal tissue between the anastomotic assembly 6 and the nail supporting seat 7 is fully squeezed, the safety device 4 can be loosened, the percussion assembly 3 is gripped, the percussion is completed, and then the classical circular end-side anastomosis of the alimentary canal under the laparoscope is completed. The cooperative work of the mechanisms of the embodiment ensures that the endoscopic anastomat can realize accurate positioning, reliable fixation and safe anastomosis in a narrow space of an abdominal cavity, thereby improving the convenience and safety of operation.

In summary, the stapler for the endoscope provided by the invention has the following advantages:

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The anastomat for the endoscope is characterized by comprising an angle adjusting mechanism, a firing assembly, a rotating mechanism, a first connecting rod, a second connecting rod and an anastomotic assembly which are connected in sequence;

2. The endoscopic stapler according to claim 1, wherein the angle adjusting mechanism includes a steering knob, a steering shaft, a limit assembly, a gear, a first rack, and a second rack;

3. The endoscopic stapler according to claim 2, wherein the limiting assembly comprises a limiting plate, a limiting member, a limiting rod and an elastic member;

4. The endoscopic stapler according to claim 3, wherein the limiting plate is an annular disk, the tooth slot is provided on a portion of an inner side wall of the limiting plate, a radius dimension of a center position of the limiting plate from an outer edge of the tooth slot is larger than an inner diameter dimension of the limiting plate, and a length dimension of the limiting member is larger than the inner diameter dimension of the limiting plate and smaller than the radius dimension of the center position of the limiting plate from the outer edge of the tooth slot.

5. The endoscopic stapler according to claim 2, wherein the rotation mechanism includes a rotation housing, a rotation control member, and a rotation sleeve shaft;

6. The endoscopic stapler of claim 1, wherein a diameter of said second connecting rod is smaller than a diameter of said first connecting rod.

7. The endoscopic stapler according to claim 1, wherein an outer side wall of the second connecting rod is coated with an anti-slip coating, and wherein a plurality of annular grooves are provided on the outer side wall of the second connecting rod.

8. The endoscopic stapler of claim 1, wherein a safety device is provided on the firing assembly.

9. The endoscopic stapler of claim 1 wherein an end of the firing assembly remote from the rotary mechanism is connected to a handle, the opposite sides of the handle being provided with indicators.

10. The endoscopic stapler according to claim 9, further comprising a central rod having elasticity, wherein an end portion of the handle away from the firing assembly is rotatably connected with an adjusting knob, the adjusting knob is connected to one end of the central rod, the other end of the central rod sequentially passes through centers of the handle, the firing assembly, the rotating mechanism, the first connecting rod, the second connecting rod and the stapling assembly and is connected with a protective shell, the protective shell is attached to an end surface of the stapling assembly away from the second connecting rod, the other end of the central rod is driven to extend out of or retract into the stapling assembly by rotating the adjusting knob, and the other end of the central rod is used for being connected with a nail pushing seat when the protective shell is detached and the central rod extends out.