Annular knife of disposable anorectal T-type pull rod cutting stapler

Abstract

The present invention relates to the field of medical device technology, and specifically to an annular knife of a disposable anorectal T-type pull-rod cutting stapler, which is used in conjunction with a disposable anorectal T-type pull-rod cutting stapler and a disposable anorectal straight pull-rod cutting stapler, and is suitable for the excision and anastomosis of rectal mucosal prolapse or hemorrhoidal mucosal tissue in the clinical anal canal. It has an annular knife body, an annular knife edge is provided at the upper end of the annular knife body, an assembly hole is provided in the middle and upper part of the annular knife body, a mounting protrusion is provided on the inner side or outer side of the lower end of the annular knife body, and an avoidance hole can be provided on the outer periphery of the lower part of the annular knife body, and the avoidance hole is used to avoid the push nail piece. The annular knife is reasonably designed and simple in structure. Since the cutting angle of the annular opening at the upper end of the annular knife body is set to 30°-45°, and it is made of stainless steel material, the knife edge is sharp, has good strength, and adopts a snap-on structure to protect the blade edge. It is easy to disassemble during assembly, requires less cutting force, is easy to use, shortens the operation time, improves the success rate of the operation, and reduces the pain of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an annular knife of a disposable anorectal T-type pull-rod cutting stapler, which is used in conjunction with a disposable anorectal T-type pull-rod cutting stapler and a disposable anorectal straight pull-rod cutting stapler, and is suitable for the resection and anastomosis of rectal mucosal prolapse or hemorrhoidal mucosal tissue in the clinical anal canal. Background Art

[0002] Anorectal staplers are medical devices that are often used in surgical operations for the removal of rectal mucosal prolapse or hemorrhoidal mucosal tissue. Most of these staplers use a central axis binding method. When anastomosing, the two sections of tissue are inwardly restrained to form a circular anastomotic ring inside the tissue. This device can discharge the body's bleeding during the operation along with the contents, and the collective tissue is easier to heal after the operation.

[0003] The anastomosis left by the stapler used in the anorectal stapler surgery is a closed ring, which is easy to cause anastomotic stenosis. Anorectal stapler surgery anastomotic stenosis is one of the complications after the surgery. Mild and moderate stenosis can be treated by dilating the anus with fingers, while severe stenosis requires surgical treatment. However, no matter which treatment method is a secondary injury to the patient, it is time-consuming and labor-intensive, increasing the burden on the patient.

[0004] At present, staplers use a central axis transmission method and cannot accommodate larger diseased tissues. For the resection of rectal mucosal prolapse or hemorrhoidal mucosal tissue, the diseased tissue is usually removed and sutured by a stapler. The existing movable handle and fixed handle used to control the resection and suturing are fixed in position. Since the real-time direction of the stapler needs to be determined according to the specific situation of the operation, sometimes the position of the movable handle will hinder the operation space of the operation or the position of the movable handle will cause discomfort to the operator. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned deficiencies and to provide an annular knife of a disposable anorectal T-type pull rod cutting stapler, which is used in conjunction with the disposable anorectal T-type pull rod cutting stapler. In the surgery for resection of rectal mucosal prolapse or hemorrhoidal mucosal tissue, one end of the annular knife is fixedly connected by a connecting piece of an anvil seat, and the other end is fixedly connected by a T-type pull rod. A gap that can accommodate larger diseased tissue is provided between the annular knife seat and the T-type pull rod, thereby achieving the purpose of resecting larger diseased tissue.

[0006] The annular knife of the disposable anorectal T-type pull-rod cutting stapler is realized by the following technical solutions:

[0007] The disposable anorectal T-type pull-rod cutting stapler comprises an annular knife, a staple cartridge, a staple pusher and a staple cartridge sleeve to form a staple cartridge assembly.

[0008] The annular knife of the disposable anorectal T-type pull rod cutting stapler has an annular knife body, an annular knife edge is arranged at the upper end of the annular knife body, the cutting angle of the annular knife edge is set to 30°-45°, an assembly hole is arranged in the upper and middle part of the annular knife body, at least one assembly hole is arranged, and the assembly hole is arranged in one of circular, elliptical, long waist and arc shapes, a mounting protrusion is arranged on the inner side or outer side of the lower end of the annular knife body, at least two mounting protrusions are arranged, and the mounting protrusions are arranged in one of arc, square, rectangular and trapezoidal shapes, and avoidance holes can be arranged on the outer periphery of the lower part of the annular knife body, the avoidance holes are used to avoid the pin pusher, the avoidance holes are arranged in arc, square, rectangular, trapezoidal, U-shaped or triangular shapes, and at least two avoidance holes are arranged.

[0009] The nail magazine assembly includes a nail magazine, a nail pushing piece, an annular knife, and a nail magazine sleeve.

[0010] The nail magazine is cylindrical, with an annular knife avoidance through hole in the middle, an annular push piece sliding groove is arranged on it, a nail magazine sleeve mounting protrusion and a nail magazine sleeve mounting groove are arranged on the outer periphery, annular knife mounting protrusions are arranged on both sides of the annular knife, an annular push piece is arranged at the front end, an annular knife groove is arranged inside, and the annular knife is installed in the annular knife groove of the nail pushing piece through the annular knife mounting protrusion, a T-shaped pull rod sliding groove is arranged in the middle of the nail pushing piece, a straight push rod mounting protrusion is arranged at the rear end, a nail magazine sleeve mounting groove is arranged at the rear of the nail pushing piece, and a nail magazine mounting protrusion is arranged on the inner side of the front end of the nail magazine sleeve. A nail magazine mounting groove is provided on the outer periphery of the front end, a push piece mounting groove is provided on the inner side of the middle part, a T-shaped pull rod mounting hole is provided in the center, nail seat connecting piece mounting slots are provided on both sides of the interior, a push piece straight push rod mounting groove and a rotating handle mounting hole are provided on the lower part, the nail push piece is installed in the push piece mounting groove of the nail magazine sleeve, the push piece of the nail push piece slides in the push piece sliding groove of the nail magazine, the nail magazine is installed on the nail magazine mounting protrusion of the nail magazine sleeve through the nail magazine sleeve mounting groove, the nail magazine mounting protrusion of the nail magazine is installed in the nail magazine mounting groove of the nail magazine sleeve, and the mounting step of the nail magazine is fixed to the upper part of the nail magazine sleeve.

[0011] The nail magazine sleeve is provided with a rotating handle mounting hole, and the nail magazine sleeve is installed on the nail magazine sleeve mounting protrusion of the rotating handle through the rotating handle mounting hole. The rear locking ring is installed on the outer side, and the nail magazine sleeve is installed on the rotating handle. The angle can be changed by rotating the switch, which is convenient for the doctor to operate.

[0012] The nail magazine is made of ABS material, a thermoplastic engineering plastic with impact resistance, heat resistance, low temperature resistance and chemical resistance. The nail magazine is cylindrical, with a ring-shaped knife avoidance through hole in the middle which is also a tissue accommodating hole, and a ring-shaped push-piece sliding groove which is also a suture nail mounting hole, which is used for the push-piece to slide and push out the suture nail to complete suturing. An installation step is provided at the upper end, and a nail magazine sleeve mounting protrusion and a nail magazine sleeve mounting groove are provided on the outer periphery. A nail anvil seat connecting piece sliding groove corresponding to the nail anvil seat connecting piece is provided on the upper surface of the nail magazine, and at least one nail anvil seat connecting piece sliding groove is provided. The nail magazine is installed on the nail magazine mounting protrusion of the nail magazine sleeve through the nail magazine sleeve mounting groove, and the nail magazine mounting protrusion of the nail magazine is installed in the nail magazine mounting groove of the nail magazine sleeve, and the mounting step of the nail magazine is fixed to the upper part of the nail magazine sleeve.

[0013] The nail magazine sleeve is made of PES, PC or ABS, and a nail magazine mounting protrusion is provided on the inner side of the front end of the nail magazine sleeve, a nail magazine mounting groove is provided on the outer periphery of the front end, a push piece mounting groove is provided on the inner side of the middle part, a T-shaped pull rod mounting hole is provided in the center, and a nail seat connecting piece mounting slots of the nail seat connecting piece are provided on both sides of the interior, a push piece straight push rod mounting groove and a rotating handle mounting hole are provided at the lower part, and the rotating handle mounting hole of the nail magazine sleeve is mounted on the nail magazine sleeve mounting protrusion of the rotating handle, and a rear locking ring is installed on the outer side.

[0014] The annular knife is made of 304 stainless steel and has good corrosion resistance and heat resistance.

[0015] Implementation scheme: When the annular knife is used in conjunction with the stapler, it is assembled in the push piece of the stapler cartridge assembly at the front of the stapler, and the annular knife installation protrusion of the annular knife is installed in the annular knife slot of the stapler push piece. The annular knife is pushed out by the stapler push piece, the push piece straight push rod, the straight push rod, the movable handle, the movable handle cover, the firing spring, the movable handle pin, and the torsion spring stop pin to complete the tissue cutting and staple the tissue.

[0016] Advantages: The circular knife has a reasonable design and simple structure. The cutting angle of the circular opening at the upper end of the circular knife body is set to 30°-45°, and the circular knife is made of stainless steel. The blade is sharp, without notches, without whitening, and has good strength. The snap-on structure can protect the blade. It is easy to disassemble during assembly, requires less cutting force, and is used in conjunction with the stapler, making it convenient for medical staff to use during surgery, shortening the operation time, improving the success rate of the operation, and reducing the pain of the patient. The circular knife is designed to be smooth and beautiful, meeting the requirements for the use of medical equipment.

[0017] The front inner side of the rotating handle is provided with a nail magazine sleeve mounting protrusion, the middle part is provided with a push piece straight push rod movable groove, the rear outer side is provided with a rotating switch spring sliding column, the rear inner side is provided with a straight push rod movable groove, the rear outer side is provided with a fixed handle mounting groove, and the front end of the rotating switch spring sliding column is provided with a rotating switch sliding boss. The rotating handle is installed on the rotating handle mounting protrusion of the fixed handle through the fixed handle mounting groove. The rotating handle consists of a left rotating handle and a right rotating handle.

[0018] The annular knife of the disposable anorectal T-type pull-rod cutting stapler is used in conjunction with the disposable anorectal T-type pull-rod cutting stapler. The working principle of the disposable anorectal T-type pull-rod cutting stapler is as follows:

[0019] When the disposable anorectal T-type pull rod cutting stapler is used for anorectal hemorrhoid surgery, first rotate the adjusting nut counterclockwise, and under the action of the adjusting nut at the rear end of the screw rod and the cooperating thread, push the connecting plate seat, pull rod, T-type pull rod, anvil seat connecting plate, and anvil seat, and partially unscrew the anvil seat connecting plate and anvil seat, and make a purse around the tissue to be cut and stapled. At this time, the doctor can push the rotary switch upward to make the rotary switch protrusion of the fixed handle disengage from the rotary slot of the rotary switch. At this time, the fixed handle can be rotated to adjust to the appropriate surgical position, and the rotary switch is released. Under the action of the rotary switch spring, the rotary switch protrusion on the fixed handle continues to be clamped on the rotary slot. Then rotate the adjusting nut clockwise and observe the window. If the indicator needle has not reached the firing position and the movable handle is accidentally pressed, the safety boss of the movable handle will be against the safety plane of the pointer hook and cannot fire. Continue to rotate the adjusting nut until the indicator needle indicates the firing position. At this time, the safety boss of the movable handle is in the empty space on the left side of the safety plane of the pointer hook. Press the movable handle to push the straight push rod, the push sheet straight push rod, the nail push sheet and the annular knife to complete the cutting and matching. Under the action of the firing spring, the straight push rod, the push sheet straight push rod, the nail push sheet and the annular knife are driven to reset.

[0020] A circular knife of a disposable anorectal T-type pull-rod cutting stapler, used in conjunction with the disposable anorectal T-type pull-rod cutting stapler, the disposable anorectal T-type pull-rod cutting stapler features:

[0021] The disposable anorectal T-type pull rod type cutting stapler solves the problem that the existing stapler has a central axis, which limits the removal of larger diseased tissues, and solves the problem that the opening of the nail magazine sleeve is too small and the field of view is limited. The nail holder is fixedly connected by one end of the nail holder connecting piece and the other end is fixedly connected by the T-type pull rod. A gap that can accommodate larger diseased tissues is provided between the nail holder and the T-type pull rod, so as to achieve the purpose of removing larger diseased tissues; the outer periphery of the nail magazine sleeve is provided with two or more large field of view openings, and the direction of the fixed handle and the nail magazine sleeve can be adjusted at any angle by rotating the handle, so that the diseased tissue can be observed more clearly, which is convenient for surgery and reduces the difficulty of surgery. The cutting and anastomosis position can be clearly observed by the indicating safety device. When the adjusting nut is rotated, the indicator needle has not reached the firing position. If the movable handle is accidentally pressed at this time, it cannot be fired. If the adjusting nut continues to be rotated, the indicator needle indicates the firing position. At this time, pressing the movable handle can complete the firing, which reduces the failure of surgery caused by misoperation during surgery and improves the success rate of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] Figure 1 This is an exploded view of a disposable anorectal T-type pull-rod cutting stapler;

[0024] Figure 2 It is a schematic diagram of the structure of a T-type pull-rod anvil adjustment device of a disposable anorectal T-type pull-rod cutting stapler;

[0025] Figure 3 1. It is a schematic diagram of the structure of the anvil seat of a disposable anorectal T-type pull-rod cutting stapler;

[0026] Figure 4 It is a schematic diagram of the T-type pull rod structure of a disposable anorectal T-type pull rod type cutting stapler;

[0027] Figure 5 It is a schematic diagram of the structure of the adjusting nut device of the disposable anorectal T-type pull rod type cutting stapler;

[0028] Figure 6 It is a schematic diagram of the structure of the adjusting nut of a disposable anorectal T-type pull rod type cutting stapler;

[0029] Figure 7 It is a schematic diagram of the structure of a stapler cartridge assembly of a disposable anorectal T-type pull-rod cutting stapler;

[0030] Figure 8 It is a schematic diagram of the stapler structure of a disposable anorectal T-type pull-rod cutting stapler;

[0031] Fig. 9 It is a schematic diagram of the push piece structure of a disposable anorectal T-type pull rod cutting stapler;

[0032] Fig.10 1. It is a schematic diagram of the structure of the stapler cartridge sleeve of a disposable anorectal T-type pull-rod cutting stapler;

[0033] Fig.11 It is a schematic diagram of the structure of the annular knife of a disposable anorectal T-type pull-rod cutting stapler;

[0034] Fig.12 It is a schematic diagram of the structure of a rotating handle of a disposable anorectal T-type pull-rod cutting stapler;

[0035] Fig.13 It is a schematic diagram of the structure of a push-piece driving device of a disposable anorectal T-type pull-rod cutting stapler;

[0036] Fig.14 It is a schematic diagram of the fixed handle structure of a disposable anorectal T-type pull-rod cutting stapler;

[0037] Fig.15 It is a schematic diagram of the structure of the indicating safety device of the disposable anorectal T-type pull-rod cutting stapler;

[0038] Fig.16 It is a schematic diagram of the structure of a rotating fixing device of a disposable anorectal T-type pull rod cutting stapler;

[0039] Fig.17 It is a schematic diagram of the rotary switch structure of a disposable anorectal T-type pull-rod cutting stapler.

[0040] In the figure: 1. adjusting nut device, 2. T-type pull rod type nail support seat adjustment device, 3. fixing handle, 4. push piece driving device, 5. rotating handle, 6. nail magazine assembly, 7. indicating safety device, 8. rotating fixing device;

[0041] 1-1, adjusting nut retaining ring, 1-2, adjusting nut pin, 1-3, adjusting nut, 1-4, adjusting nut positioning bolt, 1-5, adjusting nut cover plate;

[0042] 1-3-1, adjusting nut pin hole, 1-3-2, through hole, 1-3-3, thread, 1-3-4, adjusting nut positioning bolt matching thread, 1-3-5, adjusting nut cover matching mounting slot, 1-3-6, fixing handle mounting protrusion;

[0043] 2-1, cover cap, 2-2, anvil seat, 2-3, washer ring, 2-4, anvil seat connecting piece, 2-5, T-type pull rod, 2-6, cotter pin, 2-7, pull rod, 2-8, connecting piece seat, 2-9, screw rod;

[0044] 2-2-1, anvil seat connecting piece installation positioning groove, 2-2-2, gasket ring installation groove, 2-2-3, cap installation hole, 2-2-4, staple forming groove; 2-3-1, gasket ring installation protrusion; 2-4-1, anvil seat connecting piece installation hole; 2-5-1, T-type pull rod installation protrusion, 2-5-2, T-type pull rod installation hole, 2-5-3, T-type pull rod installation groove; 2-7-1, split pin installation hole, 2-7-2, pull rod installation protrusion; 2-8-1, pull rod installation groove, 2-8-2, split pin installation hole; 2-9-1, connecting piece seat installation protrusion, 2-9-2, guide screw installation threaded hole, 2-9-3, adjusting nut matching thread,

[0045] 3-1, rotary switch protrusion, 3-2, rotary handle mounting protrusion, 3-3, torsion spring stop pin mounting hole, 3-4, movable handle movable slot, 3-5, movable handle pin mounting hole, 3-6, indicator needle mounting column, 3-7, window mounting slot, 3-8, pointer hook movable slot, 3-9, guide screw movable slot, 3-10, adjustment nut mounting slot;

[0046] 4-1, annular knife; 4-2, nail pusher; 4-3, pusher straight push rod; 4-4, straight push rod; 4-5, movable handle; 4-6, movable handle cover; 4-7, firing spring; 4-8, movable handle pin; 4-9, torsion spring stop pin;

[0047] 5-1, nail magazine sleeve mounting protrusion, 5-2, push piece straight push rod movable groove, 5-3, rotary switch spring sliding column, 5-4, straight push rod movable groove, 5-5, fixed handle mounting groove, 5-6, rotary switch sliding boss;

[0048] 6-1, nail magazine, 6-2, nail magazine sleeve; 6-1-1, push piece sliding groove, 6-1-2, nail magazine sleeve mounting groove, 6-1-3, nail magazine sleeve mounting protrusion, 6-1-4, annular knife avoidance through hole; 6-2-1, nail magazine mounting protrusion, 6-2-2, nail magazine mounting groove, 6-2-3, push piece mounting groove, 6-2-4, T-type pull rod mounting hole, 6-2-5, nail seat connecting piece mounting slot, 6-2-6, push piece straight push rod mounting slot, 6-2-7, rotating handle mounting hole;

[0049] 7-1, spring sheet, 7-2, window, 7-3, indicator needle, 7-4, pointer hook, 7-5, adjustment block, 7-6, guide screw, 7-7, compression spring; 7-3-1, fixed handle mounting hole, 7-3-2, pointer hook boss, 7-3-3, spring sheet mounting boss, 7-3-4, spring sheet mounting boss; 7-4-1, hook, 7-4-2, screw rod mounting hole, 7-4-3, safety plane; 7-5-1, waist-shaped hole;

[0050] 8-1, rotary switch spring, 8-2, rotary switch; 8-2-1, anti-slip groove, 8-2-2, rotary handle sliding groove, 8-2-3, rotary card slot. DETAILED DESCRIPTION

[0051] Reference Figure 1-17 The disposable anorectal T-type pull-rod cutting stapler is realized by adopting the following technical scheme. The disposable anorectal T-type pull-rod cutting stapler includes a T-type pull-rod stapler adjustment device 2, a stapler magazine assembly 6, a push-piece driving device 4, a fixed handle 3, a rotating handle 5, an adjusting nut device 1, an indicating safety device 7 and a rotating fixing device 8.

[0052] The rear part of the T-type pull rod type nail support seat adjustment device 2 is installed on the fixed handle 3, the nail magazine assembly 6 is installed on the front part of the T-type pull rod type nail support seat adjustment device 2, the adjusting nut device 1 is installed on the rear end of the T-type pull rod type nail support seat adjustment device 2, the push piece driving device 4 is used to drive the annular knife and the nail push piece, the rotating handle 5 is installed at the front end of the fixed handle 3, and is used to rotate and adjust the position of the fixed handle 3 and the nail support seat 2-2, the rotating fixing device 8 is mounted on the rotating handle 5, and the indicating safety device 7 is installed on the fixed handle 3.

[0053] The T-type pull rod type anvil seat adjustment device 2 comprises a cap 2-1, anvil seat 2-2, a washer ring 2-3, anvil seat connecting piece 2-4, a T-type pull rod 2-5, a cotter pin 2-6, a pull rod 2-7, a connecting piece seat 2-8, a screw rod 2-9, and an adjustment nut 1-3. Anvil seat connecting piece mounting positioning grooves 2-2-1 and cap mounting holes 2-2-3 are provided on both sides of the front end of the anvil seat 2-2, a staple forming groove 2-2-4 is provided on the rear end plane, and a washer ring mounting groove 2-2-2 is provided on the inner ring of the middle part of the rear end. The cap 2-1 is installed at the front of the dowel seat 2-2, the cap mounting protrusion 2-1-1 of the cap 2-1 is installed in the cap mounting hole 2-2-3 of the dowel seat 2-2, the washer ring mounting protrusion 2-3-1 of the washer ring 2-3 is installed in the washer ring mounting groove 2-2-2 of the dowel seat 2-2, and the dowel seat connecting piece 2-4 is provided with a dowel seat connecting piece mounting hole 2-4-1 at the tail end, and the dowel seat connecting piece 2-4 is inserted into the dowel seat connecting piece mounting positioning groove 2-2-1 of the dowel seat 2-2.

[0054] The front end of the T-shaped pull rod 2-5 is connected to the tail end of the pin seat connecting plate 2-4, the rear end of the T-shaped pull rod 2-5 is connected to one end of the pull rod 2-7, the other end of the pull rod 2-7 is connected to the connecting plate seat 2-8, the rear end of the connecting plate seat 2-8 is connected to the front end of the screw rod 2-9, and the rear end of the screw rod 2-9 is equipped with an adjusting nut 1-3.

[0055] A T-rod mounting protrusion 2-5-1 is provided at the front end of the T-rod 2-5, and the T-rod mounting protrusion 2-5-1 of the T-rod 2-5 is installed in the anvil seat connecting piece mounting hole 2-4-1 of the anvil seat connecting piece 2-4, and a T-rod mounting hole 2-5-2 and a T-rod mounting groove 2-5-3 are provided at the rear end, cotter pin mounting holes 2-7-1 and a rod mounting protrusion 2-7-2 are provided at both ends of the rod 2-7, and a rod mounting groove 2-8-1 and a cotter pin mounting hole 2-8-2 are provided at the front end of the connecting piece seat 2-8, one end of the rod mounting protrusion 2-7-2 of the rod 2-7 is installed in the T-rod mounting groove 2-5-3 of the T-rod 2-5, and the other end is installed in the connecting piece seat 2-8. The connecting piece seat 2-8 is in the rod installation groove 2-8-1, and both ends are installed in the T-type rod installation hole 2-5-2 and the cotter pin installation hole 2-8-2 through the cotter pin 2-6. The rear end of the connecting piece seat 2-8 is provided with a screw rod installation groove 2-8-2, and the front end of the screw rod 2-9 is provided with a connecting piece seat installation protrusion 2-9-1. The middle rear side is provided with a guide screw installation threaded hole 2-9-2, and the rear end is provided with an adjusting nut matching thread 2-9-3. The connecting piece seat installation protrusion 2-9-1 at the front end of the screw rod 2-9 is installed in the screw rod installation groove 2-8-2 of the connecting piece seat 2-8, and the adjusting nut 1-3 is matched and installed on the adjusting nut matching thread 2-9-3 of the screw rod 2-9. (See Figure 2 )

[0056] The anvil seat 2-2 is made of 304 stainless steel material with good corrosion resistance and heat resistance, and good welding performance, which can ensure good alignment during assembly, good nail forming to prevent bleeding, and ensure the success of the operation. Anvil seat connecting piece installation positioning grooves 2-2-1 are provided on both sides of the front end of the anvil seat 2-2, and the number of anvil seat connecting piece installation positioning grooves 2-2-1 is at least one, cap installation holes 2-2-3 are provided on both sides of the front end, anastomosis staple forming grooves 2-2-4 are provided on the rear end plane, and a washer ring installation groove 2-2-2 is provided on the inner ring of the middle part of the rear end. The cap mounting protrusion 2-1-1 of the cap 2-1 is mounted in the cap mounting hole 2-2-3 of the anvil seat 2-2, the washer ring mounting protrusion 2-3-1 of the washer ring 2-3 is mounted in the washer ring mounting groove 2-2-2 of the anvil seat 2-2, and the tail end of the anvil seat connecting piece 2-4 is provided with an anvil seat connecting piece mounting hole 2-4-1, and the anvil seat connecting piece 2-4 is inserted into the anvil seat connecting piece positioning groove 2-2-1 of the anvil seat 2-2. (See Figure 3 )

[0057] The T-shaped pull rod 2-5 is made of 2Cr13 stainless steel, which has good hardness and high strength, and can ensure that the T-shaped pull rod does not deform or break when firing, thereby ensuring the success of the operation. A T-rod mounting protrusion 2-5-1 is provided at the front end of the T-rod 2-5, and the T-rod mounting protrusion 2-5-1 of the T-rod 2-5 is installed in the anvil seat connecting piece mounting hole 2-4-1 of the anvil seat connecting piece 2-4, and a T-rod mounting hole 2-5-2 and a T-rod mounting groove 2-5-3 are provided at the rear end, and cotter pin mounting holes 2-7-1 and a rod mounting protrusion 2-7-2 are provided at both ends of the rod 2-7, and a rod mounting groove 2-8-1 and a cotter pin mounting hole 2-8-2 are provided at the front end of the connecting piece seat 2-8, one end of the rod mounting protrusion 2-7-2 of the rod 2-7 is installed in the T-rod mounting groove 2-5-3 of the T-rod 2-5, and the other end is installed in the rod mounting groove 2-8-1 of the connecting piece seat 2-8, and both ends are installed in the T-rod mounting hole 2-5-2 and the cotter pin mounting hole 2-8-2 through cotter pins 2-6. (See Figure 4 )

[0058] The adjusting nut device 1 comprises an adjusting nut retaining ring 1-1, an adjusting nut pin 1-2, an adjusting nut 1-3, an adjusting nut positioning bolt 1-4, and an adjusting nut cover plate 1-5. An adjusting nut pin hole 1-3-1 is provided at one side of the front end of the adjusting nut 1-3, the adjusting nut pin 1-2 is installed in the adjusting nut pin hole 1-3-1 of the adjusting nut 1-3, the adjusting nut retaining ring 1-1 is sleeved on the front end of the adjusting nut 1-3, a through hole 1-3-2 is provided in the middle of the adjusting nut 1-3, a section of the through hole is provided with a thread 1-3-3, an adjusting nut positioning bolt matching thread 1-3-4 and an adjusting nut cover matching mounting slot 1-3-5 are provided at the rear end of the adjusting nut 1-3, a fixed handle mounting protrusion 1-3-6 is provided in the middle of the adjusting nut 1-3, and is matched and installed in the adjusting nut mounting slot 3-10 of the fixed handle 3, the adjusting nut positioning bolt 1-4 is installed on the adjusting nut positioning bolt matching thread 1-3-4 at the rear end of the adjusting nut 1-3, and the adjusting nut cover plate 1-5 is installed in the adjusting nut matching mounting slot 1-3-5. (See Figure 5 )

[0059] The nail magazine assembly 6 includes a nail magazine 6-1, a nail pushing piece 4-2, an annular knife 4-1, and a nail magazine sleeve 6-2.

[0060] The nail magazine 6-1 is cylindrical, with an annular knife avoidance through hole 6-1-4 in the middle, a push sheet sliding groove 6-1-1 distributed in an annular manner on it, a nail magazine sleeve mounting protrusion 6-1-3 and a nail magazine sleeve mounting groove 6-1-2 provided on the outer periphery, annular knife mounting protrusions 4-1-3 are provided on both sides of the annular knife 4-1, a push sheet 4-2-2 distributed in an annular manner is provided at the front end of the nail pushing sheet 4-2, an annular knife card groove 4-2-1 is provided inside, a T-type pull rod sliding groove 4-2-3 is provided in the middle, a straight push rod mounting protrusion 4-2-4 is provided at the rear end, a nail magazine sleeve mounting card groove 4-2-5 is provided at the rear of the nail pushing sheet, a nail magazine mounting protrusion 6-2-1 is provided on the inner side of the front end of the nail magazine sleeve 6-2, a nail magazine mounting groove 6-2-2 is provided on the outer periphery of the front end, a push sheet mounting groove 6-2-3 is provided on the inner side of the middle part, a T-type pull rod mounting hole 6-2-4 is provided in the center, and abutments are provided on both sides of the interior The nail support seat connecting piece 2-4 is provided with a mounting slot 6-2-5, a push-piece straight push rod mounting slot 6-2-6 and a rotating handle mounting hole 6-2-7 at the lower part, the nail push piece 4-2 is installed in the push piece mounting slot 6-2-3 of the nail magazine sleeve 6-2, and the push piece 4-2-1 of the nail push piece 4-2 slides in the push piece sliding slot 6-1-1 of the nail magazine 6-1, and the nail magazine 6-1 is installed on the nail magazine sleeve through the mounting groove 6-1-2. The nail magazine installation protrusion 6-2-1 of the magazine sleeve 6-2 is installed in the nail magazine installation groove 6-2-2 of the nail magazine sleeve 6-2. The installation step 6-1-6 of the nail magazine 6-1 is fixed to the upper part of the nail magazine sleeve 6-2. The rotating handle installation hole 6-2-7 of the nail magazine sleeve 6-2 is installed on the nail magazine sleeve installation protrusion 5-1-1 of the rotating handle 5-1, and the rear locking ring 8-3 is installed on the outside. The nail magazine sleeve assembly is installed on the rotating handle, and the angle can be changed by rotating the switch, which is convenient for doctors to operate. (See Figure 7 )

[0061] The nail magazine 6-1 is made of ABS material, a thermoplastic engineering plastic with impact resistance, heat resistance, low temperature resistance and chemical resistance. The nail magazine 6-1 is cylindrical, with an annular knife avoidance through hole 6-1-4 in the middle, which is also a tissue accommodating hole, and an annular push-piece sliding groove 6-1-1 is arranged on it, which is also a suture nail installation hole, for the push-piece to slide and push out the suture nail to complete the suturing. The upper end is provided with an installation step 6-1-6, and the outer periphery is provided with a nail magazine sleeve installation protrusion 6-1-3 and a nail magazine sleeve installation groove 6-1-2. The upper surface of the nail magazine 6-1 is provided with an anvil connecting piece sliding groove 6-1-5 corresponding to the anvil connecting piece 2-4, and at least one anvil connecting piece sliding groove 6-1-5 is provided. The nail magazine 6-1 is installed on the nail magazine installation protrusion 6-2-1 of the nail magazine sleeve 6-2 through the nail magazine sleeve installation groove 6-1-2. The nail magazine installation protrusion 6-2-1 of the nail magazine 6-1 is installed in the nail magazine installation groove 6-2-2 of the nail magazine sleeve 6-2. The installation step 6-1-6 of the nail magazine 6-1 is fixed to the upper part of the nail magazine sleeve 6-2. (See Figure 8 , 9 )

[0062] The nail magazine sleeve is made of PES, PC or ABS. The front inner side of the nail magazine sleeve 6-2 is provided with a nail magazine mounting protrusion 6-2-1, the outer periphery of the front end is provided with a nail magazine mounting groove 6-2-2, the inner side of the middle is provided with a push piece mounting groove 6-2-3, the center is provided with a T-type pull rod mounting hole 6-2-4, the inner two sides are provided with a nail seat connecting piece mounting card groove 6-2-5 of the nail seat connecting piece 2-4, the lower part is provided with a push piece straight push rod mounting groove 6-2-6 and a rotating handle mounting hole 6-2-7, the rotating handle mounting hole 6-2-7 of the nail magazine sleeve 6-2 is matched and installed on the nail magazine sleeve mounting protrusion 5-1-1 of the rotating handle 5-1, and the outer side is provided with a rear locking ring 8-3. (See Fig.10 )

[0063] The annular knife 4-1 is made of 304 stainless steel, which has good corrosion resistance and heat resistance. The annular knife 4-1 structure has an annular knife body, and an annular blade 4-1-1 is provided on the upper end of the annular knife body. The cutting angle of the annular blade 4-1-1 is set to 30°-45°. An assembly hole 4-1-2 is provided in the upper and middle part. At least one assembly hole 4-1-2 is provided. The assembly hole 4-1-2 is set to one of circular, elliptical, long waist, and arc shapes. A mounting protrusion 4-1-3 is provided on the inner or outer side of the lower end. At least two mounting protrusions 4-1-3 are provided. The mounting protrusion 4-1-3 is set to one of arc, square, rectangular, and trapezoidal shapes. Avoidance holes 4-1-4 can be provided on the lower periphery. The avoidance holes 4-1-4 are used to avoid the push pin piece 4-2. The avoidance holes 4-1-4 are set to arc, square, rectangular, trapezoidal, U-shaped, and triangular. At least two avoidance holes 4-1-4 are provided. (See Fig.11 )

[0064] Implementation scheme: When the annular knife 4-1 is used in conjunction with the stapler, it is assembled in the push piece of the stapler cartridge assembly at the front of the stapler, and the annular knife installation protrusion 4-1-3 of the annular knife 4-1 is installed in the annular knife clamping groove 4-2-1 of the stapler push piece 4-2. The stapler push piece 4-2, the push piece straight push rod 4-3, the straight push rod 4-4, the movable handle 4-5, the movable handle cover 4-6, the firing spring 4-7, the movable handle pin 4-8, and the torsion spring stop pin 4-9 are used to fire and push out the annular knife 4-1 to complete the cutting of tissues and staple the tissues at the same time.

[0065] Advantages: The circular knife has a reasonable design and simple structure. The cutting angle of the circular opening at the upper end of the circular knife body is set to 30°-45° and is made of stainless steel. The blade is sharp, without notches, without whitening, and has good strength. The snap-on structure can protect the blade. It is easy to disassemble during assembly, requires less cutting force, and is used in conjunction with the stapler, making it convenient for medical staff to use during surgery, shortening the operation time, improving the success rate of the operation, and reducing the pain of the patient. The circular knife is designed to be smooth and beautiful, meeting the requirements for the use of medical equipment.

[0066] The rotating handle 5 is provided with a nail magazine sleeve mounting protrusion 5-1 on the inner front side, a push-piece straight push rod movable groove 5-2 on the middle side, a rotating switch spring sliding column 5-3 on the outer rear side, a straight push rod movable groove 5-4 on the inner rear side, a fixed handle mounting groove 5-5 on the outer rear side, and a rotating switch sliding boss 5-6 on the front end of the rotating switch spring sliding column 5-3. The rotating handle 5-1 is installed on the rotating handle mounting protrusion 3-1-2 of the fixed handle 3-1 through the fixed handle mounting groove 5-5. The rotating handle 5 consists of two parts: a left rotating handle and a right rotating handle. (See Fig.12 )

[0067] The push-piece driving device 4 comprises an annular knife 4-1, a nail pushing piece 4-2, a push-piece straight push rod 4-3, a straight push rod 4-4, a movable handle 4-5, a movable handle cover 4-6, a firing spring 4-7, a movable handle pin 4-8, and a torsion spring stop pin 4-9.

[0068] Annular knife 4-1 is provided with annular knife mounting protrusions 4-1-3 on both sides, a push piece 4-2-2 distributed in an annular shape is provided at the front end of the nail pushing piece 4-2, an annular knife card groove 4-2-1 is provided inside, a T-shaped pull rod sliding groove 4-2-3 is provided in the middle, a straight push rod mounting protrusion 4-2-4 is provided at the rear end, a nail magazine sleeve mounting card groove 4-2-5 is provided at the rear of the nail pushing piece, the annular knife 4-1 is installed in the annular knife card groove 4-2-1 of the nail pushing piece 4-2 through the annular knife mounting protrusion 4-1-3, a push piece straight push rod 4-3 is provided with a push piece mounting protrusion 4-3-1 at the front end, and a nail magazine sleeve mounting card groove 4-2-5 is provided at the rear end of the nail pushing piece. The end of the push rod is provided with a straight push rod installation groove 4-3-2, the front end of the straight push rod 4-4 is provided with a push piece straight push rod installation protrusion 4-4-1, the middle part is provided with a screw rod sliding hole 4-4-2, the rear end of the straight push rod 4-4 is provided with a movable handle movable card groove 4-4-3, the push piece installation protrusion 4-3-1 of the push piece straight push rod 4-3 is installed on the straight push rod installation protrusion 4-2-4, the push piece straight push rod installation protrusion 4-4-1 at the front end of the straight push rod 4-4 is installed in the straight push rod installation groove 4-3-2 at the rear end of the push piece straight push rod 4-3, and the top of the movable handle 4-5 is provided with a straight push rod matching protrusion The movable handle 4-5-1 is provided with a movable handle pin mounting hole 4-5-2 at the lower part of the straight push rod matching the protrusion 4-5-1, a firing spring clamping position 4-5-3 is provided on the outer side of the movable handle 4-5, a movable handle cover clamping slot 4-5-4 is provided at the lower part, a safety boss 4-5-5 is provided on the upper right side, a movable handle mounting buckle 4-6-1 is provided at the lower part of the movable handle cover 4-6, the movable handle 4-5 is installed on the movable handle mounting buckle 4-6-1 of the movable handle cover 4-6 through the movable handle cover clamping slot 4-5-4, and the movable handle pin 4-8 passes through the movable handle 4 -5's movable handle pin mounting hole 4-5-2 is installed in the movable handle pin mounting hole 3-1-5 of the fixed handle 3-1, the firing spring 4-7 is sleeved on the movable handle pin 4-8, the torsion spring stop pin 4-9 is installed in the torsion spring stop pin mounting hole 3-1-3 on the fixed handle 3-1, one side of the firing spring 4-7 rests on the torsion spring stop pin 4-9, and the other side rests on the firing spring position 4-5-3 of the movable handle 4-5, and the straight push rod of the movable handle 4-5 cooperates with the protrusion 4-5-1 to rest in the movable handle movable slot 4-4-3 of the straight push rod 4-4. (See Fig.13 )

[0069] The front end of the fixed handle 3 is provided with a rotary switch protrusion 3-1, the inner side of the front is provided with a rotary handle mounting protrusion 3-2, the right side of the rotary handle mounting protrusion 3-2 is provided with a torsion spring stop pin mounting hole 3-3, the lower side is provided with a movable handle movable groove 3-4, the upper side of the lower part is provided with a movable handle pin mounting hole 3-5 and an indicator needle mounting column 3-6, the upper part is provided with a window mounting groove 3-7, the lower side of the rear is provided with a pointer pull hook movable groove 3-8, the middle part of the rear is provided with a guide screw movable groove 3-9, and the rear end of the fixed handle 3 is provided with an adjusting nut mounting groove 3-10. The fixed handle 3 consists of two parts: a left fixed handle and a right fixed handle. (See Fig.14 )

[0070] The indicating safety device 7 comprises a spring sheet 7-1, a window 7-2, an indicating needle 7-3, a pointer hook 7-4, an adjusting block 7-5, a guide screw 7-6 and a compression spring 7-7. A fixed handle mounting hole 7-3-1 is provided at the lower part of the indicating needle 7-3, the indicating needle 7-3 is installed on the indicating needle mounting column 3-6 of the fixed handle 3-1, a pointer hook boss 7-3-2 is provided at the lower end of the indicating needle 7-3, a pointer 7-3 and a spring sheet mounting boss 7-3-3 are provided at the upper part, the spring sheet 7-1 is installed on the indicating needle mounting column 3-6 of the fixed handle 3-1, the upper part abuts against the spring sheet mounting boss 7-3-4 of the indicating needle 7-3, and a fixed handle mounting boss 7-2 is provided on the window 7-2. -1, installed in the window installation groove 3-1-7 of the fixed handle 3-1, through the transparent window 7-2, the indicator needle 7-3 below can be seen, the pointer hook 7-4 is provided with a hook 7-4-1 at the front end, a screw rod installation hole 7-4-2 at the rear end, and a safety plane 7-4-3 in the middle. The pointer hook 7-4 is sleeved on the screw rod 2-9 and installed in the pointer hook movable groove 3-1-8 of the fixed handle 3-1. The front hook 7-4-1 is hooked on the pointer hook boss 7-3-2 of the indicator needle 7-3. The compression spring 7-7 is sleeved on the screw rod 2-9, the front end of the compression spring 7-7 is against the pointer hook 7-4, and the rear end is against the adjustment nut 1-3. The adjustment block 7-5 is U-shaped, with a waist-shaped hole 7-5-1 in the middle. The adjustment block 7-5 is installed on the screw rod 2-9 through the guide screw 7-6, and the guide screw 7-6 is installed in the guide screw installation threaded hole 2-9-2. The left side of the pointer hook 7-4 rests against the adjusting block 7-5, and the guide screw 7-6 moves in the guide screw movable groove 3-1-9 of the fixed handle 3-1.

[0071] (See Fig.15 )

[0072] The rotating fixing device 8 includes a rotating switch spring 8-1 and a rotating switch 8-2. The rotating switch spring 8-1 is sleeved on the rotating switch spring sliding column 5-3 of the rotating handle 5. The rotating switch 8-2 ​​is provided with anti-slip grooves 8-2-1 on the outside, and a through hole and a rotating handle sliding groove 8-2-2 on the inside. The rotating switch 8-2 ​​is sleeved on the rotating handle 5, and the rotating switch sliding boss 5-6 slides on the rotating handle sliding groove 8-2-2. The rear of the rotating switch 8-2 ​​is provided with a rotating groove 8-2-3 distributed in a ring shape. Under the action of the rotating switch spring 8-1, the rotating switch protrusion 3-1-1 on the fixed handle 3-1 is clamped on the rotating groove 8-2-3. (See Fig.16 )

[0073] The annular knife of the disposable anorectal T-type pull rod type cutting stapler is used in conjunction with the disposable anorectal T-type pull rod type cutting stapler. When the disposable anorectal T-type pull rod type cutting stapler is used for anorectal hemorrhoid surgery, the adjusting nut 1-3 is firstly rotated counterclockwise, and the adjusting nut at the rear end of the screw rod 2-9 cooperates with the thread 2-9-2 to push the connecting piece seat 2-8, the pull rod 2-7, the T-type pull rod 2-5, the anvil seat connecting piece 2-4, and the anvil seat 2-2. -2 is partially unscrewed, and the tissue to be cut and anastomosed is pursed. At this time, the doctor can push the rotary switch 8-2 ​​upward to make the rotary switch protrusion 3-1-1 of the fixed handle 3-1 disengage from the rotary slot 8-2-3 of the rotary switch 8-2. At this time, the fixed handle 3-1 can be rotated to adjust to a suitable surgical position, and the rotary switch 8-2 ​​is released. Under the action of the rotary switch spring 8-1, the rotary switch protrusion 3-1-1 on the fixed handle 3-1 continues to be clamped on the rotary slot 8-2-3. Then rotate the adjusting nut 1-3 clockwise and observe the viewing window 7-2. If the indicator needle 7-3 has not reached the firing position and the movable handle 4-5 is accidentally pressed, at this time, the safety boss 4-5-5 of the movable handle 4-5 is against the safety plane 7-4-3 of the pointer hook 7-4 and cannot fire. Continue to rotate the adjusting nut 1-3 until the indicator needle 7-3 indicates the firing position. At this time, the safety boss 4-5-5 of the movable handle 4-5 is in the empty space on the left side of the safety plane 7-4-3 of the pointer hook 7-4. Press the movable handle 4-8 to push the straight push rod 4-4, the push sheet straight push rod 4-3, the nail push sheet 4-2 and the annular knife 4-1 to complete the cutting and matching. Under the action of the firing spring 4-7, the straight push rod 4-4, the push sheet straight push rod 4-3, the nail push sheet 4-2 and the annular knife 4-1 are driven to reset.

[0074] A circular knife of a disposable anorectal T-type pull-rod cutting stapler is used in conjunction with the disposable anorectal T-type pull-rod cutting stapler. The advantages of the disposable anorectal T-type pull-rod cutting stapler are:

[0075] The disposable anorectal T-type pull rod cutting stapler has a reasonable design and compact structure. During anorectal hemorrhoid surgery, the position of the fixed handle and the anvil can be adjusted at any angle by rotating the handle, which reduces the difficulty of the operation and avoids the position of the movable handle obstructing the operating space of the operation. Through the indicating safety device, the cutting and anastomosis position can be clearly observed. When the adjusting nut is rotated, the indicator needle has not reached the firing position. If the movable handle is accidentally pressed at this time, it cannot be fired. If the adjusting nut continues to be rotated, the indicator needle indicates the firing position. At this time, pressing the movable handle can complete the firing, reducing the failure of the operation caused by misoperation during the operation and improving the success rate of the operation. The large window design can observe the position of the indicator needle more clearly, reducing the difficulty of observation during the operation. The sharp cutting knife can cut the tissue at one time during the operation, complete the cutting and suturing, and relieve the pain of the patient. The movable handle and the fixed handle are processed by rubber coating, and the frosted touch can play a role in anti-slip during the operation. The two-wing adjustment nut design makes it easier to rotate. When the instrument is used, the tissue is pulled up from both sides of the anvil connection piece and then the tissue is cut. After the doctor ties the purse normally, the tissue can be retained on the anvil connection piece, tighten the suture and pull it out through the side space of the stapler sleeve, opening the anastomosis, thereby releasing the anastomotic tension and effectively avoiding anastomotic stenosis.

[0076] Due to the provision of a T-type pull rod transmission device, the anvil is more accurately aligned with the staple magazine, and the staples are well formed to achieve the purpose of reducing bleeding. Anvil connecting pieces are provided at both ends of the anvil to better align with the staple magazine.

Claims

1. A disposable anorectal T-type pull rod cutting stapler with an annular knife, characterized in that: It has an annular blade body, an annular blade edge is arranged at the upper end of the annular blade body, an assembly hole is arranged in the middle and upper part of the annular blade body, a mounting protrusion is arranged on the inner side or the outer side of the lower end of the annular blade body, and an avoidance hole is arranged on the outer periphery of the lower part of the annular blade body, and the avoidance hole is used to avoid the nail pushing piece; The annular knife, the nail magazine, the nail pushing piece, and the nail magazine sleeve form a nail magazine assembly; The nail magazine is cylindrical, with an annular knife avoidance through hole in the middle, an annular push piece sliding groove is arranged on it, a nail magazine sleeve mounting protrusion and a nail magazine sleeve mounting groove are arranged on the outer periphery, annular knife mounting protrusions are arranged on both sides of the annular knife, an annular push piece is arranged at the front end, an annular knife groove is arranged inside, and the annular knife is installed in the annular knife groove of the nail pushing piece through the annular knife mounting protrusion, a T-shaped pull rod sliding groove is arranged in the middle of the nail pushing piece, a straight push rod mounting protrusion is arranged at the rear end, a nail magazine sleeve mounting groove is arranged at the rear of the nail pushing piece, and a nail magazine mounting protrusion is arranged on the inner side of the front end of the nail magazine sleeve. A nail magazine mounting groove is provided on the outer periphery of the front end, a push piece mounting groove is provided on the inner side of the middle part, a T-shaped pull rod mounting hole is provided in the center, a nail seat connecting piece mounting card groove of the nail seat connecting piece is provided on both sides of the interior, a push piece straight push rod mounting groove and a rotating handle mounting hole are provided on the lower part, the nail push piece is installed in the push piece mounting groove of the nail magazine sleeve, the push piece of the nail push piece slides in the push piece sliding groove of the nail magazine, the nail magazine is installed on the nail magazine mounting protrusion of the nail magazine sleeve through the nail magazine sleeve mounting groove, the nail magazine mounting protrusion of the nail magazine is installed in the nail magazine mounting groove of the nail magazine sleeve, and the mounting step of the nail magazine is fixed to the upper part of the nail magazine sleeve; The assembly hole is arranged in one of a circular shape, an elliptical shape, a long waist shape and an arc shape.

2. The annular knife of the disposable anorectal T-type pull rod cutting stapler according to claim 1, characterized in that: The cutting angle of the annular blade is set to 30°-45°.

3. The annular knife of the disposable anorectal T-type pull-rod cutting stapler according to claim 1 is characterized in that: At least one assembly hole is provided.

4. The annular knife of the disposable anorectal T-type pull-rod cutting stapler according to claim 1 is characterized in that: The mounting protrusion is configured to be one of an arc shape, a square shape, a rectangle shape, and a trapezoid shape.

5. The annular knife of the disposable anorectal T-type pull-rod cutting stapler according to claim 1 is characterized in that: There are at least 2 mounting protrusions.

6. The annular knife of the disposable anorectal T-type pull-rod cutting stapler according to claim 1 is characterized in that: The avoidance holes are set to be arc, square, rectangular, trapezoidal, U-shaped, or triangular.

7. The annular knife of the disposable anorectal T-type pull-rod cutting stapler according to claim 1 is characterized in that: At least two avoidance holes are provided.

Images