An implantable fully intracavitary electric tubular stapler

Abstract

The present application relates to the field of medical device technology, and in particular to an implantable fully intracavitary electric tubular stapler, the stapler comprising an anvil, an anastomosis assembly, and a rotating assembly. The stapler provided by the present application can be completely implanted in the abdominal cavity, solving the defects that the existing tubular stapler needs to cross the abdominal wall when used for laparoscopic surgery to complete anastomosis, resulting in poor vision and difficult operation; the anastomosis assembly is arranged relative to the anvil, and the distance between the anastomosis assembly and the anvil is adjustable in a predetermined direction. The anvil is connected to the anastomosis assembly via a rotating assembly, and the rotating assembly is used to change the angle between the anvil and the predetermined direction. According to the stapler provided by the present application, by changing the angle between the anvil and the predetermined direction, the difficulty of inserting the anvil is reduced, and the difficulty of removing the anvil from the anastomosis after the anastomosis is completed is reduced, thereby reducing the risk of damage to the anastomosis when the stapler is removed.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an implantable fully intracavitary electric tubular stapler. Background Art

[0002] The stapler is a device used in medicine to replace manual suturing. Its main working principle is that the titanium nail seat of the stapler is extended into the wound to be stapled, so that the tissue at the edge of the wound is between the titanium nail seat of the stapler and the titanium nail / cutting knife carried by the stapler. At this time, the operator can drive the titanium nail / cutting knife closer to the anvil to achieve the purpose of stapled / severed wound.

[0003] Complete laparoscopic total gastrectomy and digestive tract reconstruction, lymph node clearance and digestive tract reconstruction are completed under laparoscopy, with only one incision of about 3-4 cm, usually the umbilical incision, to remove the specimen, and no additional auxiliary incision is made for digestive tract reconstruction, so the trauma is smaller, more concealed and beautiful. Complete laparoscopic total gastrectomy and digestive tract reconstruction are divided into two types according to the different reconstruction methods using staplers. One is to use a linear cutting closure device to perform side-to-side anastomosis of the esophagus and jejunum, because the shortest linear cutting closure device is 4.5 cm now, which requires that at least 4.5 cm of healthy esophagus must be retained in the lower esophagus, and for tumors at the esophagogastric junction, they must be removed more than 3 cm from the upper edge of the tumor to be completely removed. If the tumor is located higher, after ensuring that a sufficient length of esophagus is removed, it cannot be guaranteed that a sufficient length of esophagus will be left for side-to-side anastomosis, so many patients are not suitable for this type of anastomosis. If this type of anastomosis is used reluctantly, the highest point of the anastomosis is at least 4.5 cm higher than the anastomosis between the (esophageal) end and the (jejunal) side of the tubular stapler, which increases the tension on the anastomosis and therefore increases the risk of anastomotic leakage.

[0004] The second method is to use a tubular stapler for end-to-side esophagojejunal anastomosis. Because the end of the esophagus is anastomosed with the jejunum, there is no need to retain at least 4.5 cm of the lower esophagus. In theory, more patients are suitable for reconstruction using this method. However, the existing tubular stapler is designed for open surgery. During the anastomosis, the esophagus is generally cut off first, the specimen is removed, and a sealing ring is put on the small incision for taking the specimen. Then, a purse is sewn at the lower end of the esophagus under laparoscopic pneumoperitoneum, the stapler anvil is inserted, and the body of the ordinary stapler is inserted through the sealing ring to complete the anastomosis under laparoscopic pneumoperitoneum. The main disadvantage is that it is very difficult to sew the purse, insert the anvil, and tighten and knot the purse line under laparoscopic pneumoperitoneum. After the anastomosis is completed, the process of removing the titanium nail seat will also cause the risk of tearing the anastomosis, causing great pain to the patient. This is one of the main difficulties in using a circular stapler for total laparoscopic digestive tract reconstruction. In addition, all surgeries using circular staplers for total laparoscopic esophagojejunostomy face a problem: when using ordinary tubular staplers for intracavitary anastomosis, the stapler body blocks the lens, resulting in poor vision and difficulty in completing anastomosis and other operations, thus limiting its widespread application.

[0005] In response to this difficulty, Cohen developed the OrVi1 transoral anvil insertion device, which does not require laparoscopic purse string suturing and ligation, and seems to "perfectly" solve this problem. However, since the anastomotic nail anvil is inserted transorally during the operation, it will inevitably cause damage to the pharynx and larynx due to its large diameter during the insertion process, and may even cause detachment or even perforation of the esophageal mucosa. The catheter of the device is finally removed from the abdominal cavity through the opening at the lower end of the esophagus, violating the principle of sterility. At the same time, because the use of this device is to first use a linear cutting closure device to cut and close the stump of the esophagus, and then lead out the center rod of the anvil of the stapler, in fact, the final anastomosis is done on the closed edge of the lower end of the esophagus, which will form two "dog ears", which is also a potential risk point for anastomotic fistula.

[0006] Therefore, the development of a new implantable fully intracavitary stapler that is completely different from traditional open surgery is a key factor in breaking through the technical bottleneck of fully laparoscopic total gastrectomy. Summary of the invention

[0007] The purpose of the present application is to provide an implantable fully intracavitary electric tubular stapler, so as to solve the technical defects existing in the prior art such as the difficulty in inserting and removing the stapler, and the difficulty in anastomosis operation caused by poor vision, etc.

[0008] According to the present application, an implantable fully intracavitary electric tubular stapler is provided, comprising:

[0009] Anvil,

[0010] An anastomosis assembly is arranged opposite to the anvil, and the distance between the anastomosis assembly and the anvil is adjustable in a predetermined direction;

[0011] A rotating assembly, wherein the anvil is connected to the anastomosis assembly via the rotating assembly, and the rotating assembly is used to change the angle between the anvil and a predetermined direction and the distance between the anastomosis assembly and the anvil.

[0012] Preferably, the anastomosis device includes a shell and a stop key, the anastomosis assembly is arranged in the shell, the stop key is fixedly connected to the first one of the shell and the anastomosis assembly, the second one of the shell and the anastomosis assembly is formed with a key slot adapted to the stop key, and when the stop key is arranged in the key slot, the stop key limits the relative rotation between the anastomosis assembly and the shell.

[0013] Preferably, the anastomosis assembly also includes a rotation-stop portion, the rotation-stop key is connected to the rotation-stop portion, the shell is formed as a cylindrical cylinder, the axis of the cylindrical cylinder extends along the predetermined direction, the keyway is arranged on the side wall of the shell, and the keyway is formed as a through groove extending along the axial direction.

[0014] Preferably, the anti-rotation part is formed as a cylinder, the axis of the cylinder coincides with the axis, and the anti-rotation part is formed with a transmission hole penetrating the anti-rotation part along the axis direction;

[0015] The stapler comprises a driving motor and a lead screw, wherein the lead screw is coaxially arranged with the driving motor and passes through the transmission hole;

[0016] The anastomosis assembly also includes a transmission part, which is arranged on a side of the anti-rotation part away from the drive motor, the first end of the transmission part is connected to the anvil, and the second end of the transmission part cooperates with the lead screw, so that the drive motor drives the anvil to move on the axis.

[0017] Preferably, the anastomosis assembly further comprises a receiving portion and a predetermined number of claw hook portions, the receiving portion being connected to the housing, the receiving portion forming a receiving cavity, the receiving cavity being used to receive the driving motor, the claw hook portion being connected to a side of the receiving portion close to the anti-rotation portion, and the predetermined number of claw hook portions being evenly distributed along the circumference of the receiving portion;

[0018] An annular through groove is formed on the outer side of the anti-rotation part at one end close to the driving motor. When the claw hook part is arranged in the annular through groove, the claw hook part can limit the anti-rotation part from moving along the axial direction.

[0019] Preferably, the transmission part comprises a transmission portion and a placement portion connected to each other, the transmission part is arranged on a side of the placement portion away from the anvil, the transmission part is formed with an internal threaded hole arranged along the axial direction, and the internal threaded hole cooperates with the lead screw.

[0020] Preferably, the anastomosis assembly further comprises an anastomosis portion, the anastomosis portion is arranged opposite to the anvil, an ejector post is arranged on a side of the anastomosis portion away from the anvil, the ejector post extends along the axial direction, the anti-rotation portion is formed with an ejector hole penetrating the anti-rotation portion along the axial direction, the ejector hole is communicated with the annular through groove, the ejector post penetrates the placement portion and extends into the ejector hole, when the ejector post extends into the ejector hole beyond a predetermined depth, the ejector post can act on the claw hook portion to eject the claw hook portion out of the annular through groove;

[0021] The number of the ejector pins is equal to the predetermined number, and the predetermined number is greater than or equal to three.

[0022] Preferably, the anastomotic portion is formed as a circular cutting blade or a titanium nail groove.

[0023] Preferably, the housing comprises a tailstock, the tailstock is arranged on a side of the sidewall away from the anvil, and the accommodating portion is connected to the tailstock. A gripping portion is arranged at the end of the tailstock away from the anastomosis portion, and the gripping portion facilitates the clamp to grip the stapler.

[0024] Preferably, an outer side of the end of the accommodation portion away from the anvil is formed with an external thread;

[0025] The inner wall of the tailstock is formed with an internal thread matching the external thread, and the outer side of the tailstock is formed with an annular groove.

[0026] The housing further comprises a supporting portion connected to the side wall, and the supporting portion is disposed in the annular groove to limit relative movement between the tailstock and the side wall in the axial direction.

[0027] Preferably, the anvil is formed as a body of revolution, and the axis of the anvil coincides with the axis;

[0028] The stapler further comprises a limiting sleeve, which is arranged on a side of the anvil facing the anastomosis assembly, and the limiting sleeve and the anvil are hinged at a center position of the anvil.

[0029] Preferably, the limiting sleeve is formed with a first hole penetrating the limiting sleeve along the axial direction;

[0030] The rotating assembly comprises an eccentric hinge beam and a positioning shaft, wherein the positioning shaft is arranged in the first hole, one end of the eccentric hinge beam is hinged to one end of the positioning shaft close to the anvil, and the other end of the eccentric hinge beam is hinged to a position of one side of the anvil deviating from the center position;

[0031] A portion of the hole wall of the first hole corresponding to the eccentric hinge beam is open, so that the eccentric hinge beam can slide along the axial direction.

[0032] Preferably, a positioning claw groove is formed at one end of the limiting sleeve away from the anvil, and the positioning claw groove extends along the axial direction;

[0033] The first end of the transmission part is formed with a positioning claw extending along the axial direction, and the positioning claw extends into the positioning claw groove from the side of the limiting sleeve away from the anvil. When the positioning claw extends into the positioning claw groove to reach a predetermined position, the transmission part can drive the limiting sleeve to move in the axial direction.

[0034] Preferably, the anastomosis assembly further comprises a limit sleeve and a limit pin portion connected to each other, the limit sleeve is arranged on a side of the limit pin portion close to the anvil, and the limit sleeve and the limit pin portion are both sleeved on the outer side of the positioning claw.

[0035] Preferably, when the positioning shaft is arranged on the limiting sleeve, one end of the positioning shaft away from the anvil is exposed to the limiting sleeve, and the one end of the positioning shaft is formed with an annular groove extending along the circumference of the positioning shaft;

[0036] The limiting pin portion includes a spring pin extending in a direction perpendicular to the axis, and a slide groove extending in the axis direction and penetrating the positioning claw is formed at one end of the positioning claw away from the anvil, the spring pin is arranged in the slide groove, and the annular groove is exposed in the slide groove;

[0037] When the anvil is in a locked state, one end of the positioning shaft close to the anvil abuts against the anvil, and the spring pin penetrates the sliding groove and falls into the annular groove.

[0038] Preferably, the inner side of one end of the positioning claw close to the anvil is formed with a flange protruding toward the axis;

[0039] A clamping groove is formed at one end of the positioning claw groove close to the anvil;

[0040] A clamping hole penetrating through the limiting sleeve is formed at one end of the limiting sleeve close to the anvil;

[0041] When the positioning claw extends into the positioning claw groove to reach a predetermined position, the side of the flange close to the axis abuts against the clamping groove;

[0042] When the anvil is in a locked state, the positioning claw extends into the positioning claw groove to reach a predetermined position, and the other side of the flange is limited by the clamping hole.

[0043] Preferably, a side of the anvil facing the anastomosis assembly is formed with an anvil portion, and the anvil portion is formed with a stapling groove.

[0044] Compared with the prior art, the beneficial effects of this application are:

[0045] The fully embodied intracavitary electric tubular stapler provided by the present application solves the technical defects of the difficulty in inserting and removing the stapler and the difficulty in anastomosis operation caused by poor vision in the prior art to a certain extent. The present application adopts anvil, rotating assembly, anastomosis part, transmission part, anti-rotation part, drive motor, gripping part and other components to realize electric anastomosis, wherein the space required for the stapler to be removed is reduced by changing the angle between the anvil and the predetermined direction, and reducing the size of the removal port is conducive to the healing of the wound, while reducing the risk of tearing the wound when the stapler is removed.

[0046] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 A schematic diagram of the exploded structure of the stapler provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of the isometric structure of the stapler provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of the assembly structure of the anvil, the limiting sleeve and the rotating assembly of the stapler provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the isometric structure of a limiting sleeve of the stapler provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the isometric structure of the limiting sleeve and the limiting pin of the stapler provided in the embodiment of the present application;

[0053] Figure 6 A schematic diagram of the isometric structure of the transmission part of the stapler provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of the isometric structure of the anti-rotation portion of the stapler provided in an embodiment of the present application;

[0055] Figure 8 A schematic diagram of the isometric structure of the claw hook portion and the receiving portion of the stapler provided in an embodiment of the present application;

[0056] Fig. 9 A schematic diagram of a cross-sectional structure of the stapler provided in an embodiment of the present application, obtained by cutting along a plane passing through the axis, in a state where the left end and the right end of the stapler are locked simultaneously;

[0057] Fig.10 This is a schematic diagram of the cross-sectional structure of the stapler provided in an embodiment of the present application, obtained by cutting along a plane passing through the axis when the stapler is in a state where the anvil is rotated and removed.

[0058] Reference numerals:

[0059] 001-first axis; 010-side wall; 011-rotation-stop groove; 020-tailstock; 021-annular groove; 022-gripping part; 030-supporting part; 031-first half ring; 032-second half ring; 100-anvil; 110-anvil part; 200-limiting sleeve; 210-positioning claw groove; 220-card groove; 300-positioning shaft; 310-annular groove; 320-eccentric hinge beam; 400-matching part; 410 - ejector column; 500-second disc; 510-limiting sleeve; 520-clamping hole; 530-spring pin; 600-transmission part; 610-positioning claw; 620-first disc; 630-transmission part; 640-slide groove; 650-anti-rotation tube; 700-anti-rotation part; 710-ejection hole; 720-annular through groove; 730-claw-receiving groove; 800-driving motor; 810-screw; 900-receiving part; 910-claw hook part. DETAILED DESCRIPTION

[0060] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0061] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0062] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0063] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] Refer to the following Figures 1 to 10 The stapler according to some embodiments of the present application is described.

[0066] See also Figures 1 to 10 As shown, an embodiment of the present application provides a stapler, which includes a nail base assembly, a stapling assembly and a rotating assembly. The nail base assembly is formed with an anvil 100, and the stapling assembly is arranged relative to the anvil 100. In a predetermined direction, the distance between the stapling assembly and the nail base assembly is adjustable. The nail base assembly is connected to the stapling assembly via a rotating assembly, and the rotating assembly is used to change the angle between the anvil 100 and the predetermined direction. In this way, by changing the angle between the anvil 100 and the predetermined direction, the space required for the stapler to be removed is reduced, and reducing the size of the removal port is conducive to the healing of the wound, while reducing the risk of tearing the wound when the stapler is removed.

[0067] Preferably, if Figure 3 and Figure 4As shown, the nail seat assembly may include an anvil 100 and a limiting sleeve 200, the limiting sleeve 200 is arranged on the side of the anvil 100 facing the above-mentioned anastomosis assembly, the limiting sleeve 200 extends along the above-mentioned extension direction, and the limiting sleeve 200 and the anvil 100 are hinged at the center position of the anvil 100. The center position specifically refers to the axis of the limiting sleeve 200 and the center line of the anvil 100 both coinciding with the first axis 001, and the first axis 001 extends along the above-mentioned predetermined direction. Optionally, a first hinge ear may be formed at the center position of the side of the anvil 100 facing the anastomosis assembly, and a first hinge hole that penetrates the limiting sleeve 200 in a direction perpendicular to the predetermined direction may be formed at one end of the limiting sleeve 200 close to the anvil 100, and the anvil 100 and the limiting sleeve 200 are hinged via the cooperation of the first hinge ear and the first hinge hole, so that the angle between the anvil 100 and the predetermined direction can be changed.

[0068] Further, the limiting sleeve 200 is formed with a first hole penetrating the limiting sleeve 200 along the direction of the first axis 001. The rotating assembly may include an eccentric hinge beam 320 and a positioning shaft 300, wherein the positioning shaft 300 is arranged in the first hole, one end of the eccentric hinge beam 320 is hinged to one end of the positioning shaft 300 close to the anvil 100, and the other end of the eccentric hinge beam 320 is hinged to a position deviating from the center position on the one side of the anvil 100. The portion of the hole wall of the first hole corresponding to the eccentric hinge beam 320 is open, so that the eccentric hinge beam 320 can slide along the direction of the first axis 001, so that in the extension direction of the first axis 001, the limiting sleeve 200 and the positioning shaft 300 can be driven to make the two move relative to each other, so as to achieve the control of the change of the angle between the anvil 100 and the predetermined direction.

[0069] In an embodiment, the anvil 100 may be formed as a rotating body, preferably, as Figure 3 As shown, a side of the rotating body close to the anastomosis assembly is formed with an annular anvil portion 110. In a direction perpendicular to the predetermined direction, from the end of the anvil portion 110 of the anvil 100 to the other end of the anvil 100, the distance from the outer side wall 010 of the anvil 100 to the central axis of the rotating body is gradually reduced, so that the anvil 100 is convenient to extend into the wound of the patient.

[0070] Preferably, the anvil portion 110 can also form a stapling groove, which can cooperate with the following circular cutting head or the titanium nail carried in the titanium nail groove, and is used to cooperate with the circular cutting head to realize circular cutting of the wound or to cooperate with the titanium nail for stapling deformation. The titanium nail groove, circular cutting head, titanium nail and stapling groove structure and stapling principle are all existing technologies in the field of anastomosis devices and will not be repeated here.

[0071] In an embodiment, the anastomosis assembly may further include a transmission part 600, such as Figure 6 As shown, the transmission part 600 may include a transmission portion 630 extending in a predetermined direction, a placement portion, and a positioning claw 610. The positioning claw 610 is disposed on a side of the placement portion facing the anvil 100, and the positioning claw 610 extends in the predetermined direction.

[0072] Preferably, if Figure 4 As shown, a positioning claw groove 210 is formed at one end of the limiting sleeve 200 away from the anvil 100, and the positioning claw groove 210 extends along a predetermined direction. The above-mentioned positioning claw 610 extends into the positioning claw groove 210 from the side of the limiting sleeve 200 away from the anvil 100. When the positioning claw 610 extends into the positioning claw groove 210 and reaches a predetermined position, the transmission part 600 can drive the limiting sleeve 200 to move in the direction of the first axis 001.

[0073] Preferably, if Figure 4 , Figure 6 and Fig. 9 As shown, the inner side of the end of the positioning claw 610 close to the anvil 100 is formed with a flange protruding toward the first axis 001. The end of the positioning claw groove 210 close to the anvil 100 is formed with a clamping groove 220. The above-mentioned predetermined position is the position where the positioning claw 610 extends into the positioning claw groove 210 so that the flange completely enters the clamping groove 220. At this time, when the driving transmission part 600 moves along the direction of the first axis 001, the transmission part 600 can drive the limiting sleeve 200 to move along the direction of the first axis 001 through the clamping action of the positioning claw 610 and the positioning claw groove 210.

[0074] Alternatively, if Figure 6 As shown, the placement portion can be formed as a first disk 620, the axis of the first disk 620 coincides with the first axis 001, the number of the positioning claws 610 can be a first predetermined number, and the first predetermined number of positioning claws 610 can be evenly distributed along the circumference of the first disk 620. The number of corresponding positioning claw grooves 210 is equal to the number of positioning claws 610 and is equal to the first predetermined number. Optionally, the first predetermined number can be one, two, three, four, five, six or more.

[0075] In an embodiment, the anastomosis assembly may further include a limit sleeve 510 and a limit pin portion connected to each other, the limit sleeve 510 is arranged on a side of the limit pin portion close to the anvil 100, and the limit sleeve 510 and the limit pin portion are both arranged on the outer side of the positioning claw 610.

[0076] Preferably, if Figure 3As shown, the positioning shaft 300 is arranged in the state of the limiting sleeve 200, and the end of the positioning shaft 300 away from the anvil 100 is exposed to the outside of the limiting sleeve 200, and the one end of the positioning shaft 300 is formed with an annular groove 310 extending circumferentially along the positioning shaft 300, and the annular groove 310 is exposed to the outside of the limiting sleeve 200. In this way, when the anvil 100 is in the locked state, the end of the positioning shaft 300 close to the anvil 100 abuts against the hinged ear of the anvil 100. At this time, when the spring pin 530 described below falls into the annular groove 310, under the joint restriction of the anvil 100, the spring pin 530 and the positioning claw 610 described below, the limiting sleeve 200 and the positioning shaft 300 cannot slide relative to each other. At this time, the angle between the nailing assembly and the predetermined direction is a right angle, and the anvil 100 is in the locked state.

[0077] Specifically, Fig. 9 and Fig.10 As shown, the stop pin portion may include a spring pin 530 extending in a direction perpendicular to the first axis 001, and a slide groove 640 extending in the direction of the first axis 001 and penetrating the positioning claw 610 may be formed on one side of the positioning claw 610 close to the placement portion. The spring pin 530 is arranged in the slide groove 640, and the annular groove 310 is exposed to the slide groove 640, so that when the spring pin 530 can slide along the slide groove 640 to the position of the annular groove 310, the spring pin 530 can fall into the annular groove 310, thereby locking the anvil 100, and fixing the anvil 100 when the stapler is in a nailing action or a circumcision action.

[0078] Alternatively, if Figure 6 As shown, the transmission part 600 may further include a circular tube portion, which is disposed between the positioning claw 610 and the placement portion and is used to connect the positioning claw 610 and the installation portion. The above-mentioned slide groove 640 may be disposed in the circular tube portion.

[0079] Alternatively, if Figure 5 As shown, the limiting pin portion may include a second disk 500 , the axis of the second disk 500 coincides with the first axis 001 , and the spring pin 530 may be fixed to the second disk 500 along the radial direction of the second disk 500 .

[0080] Optionally, the number of the spring pins 530 may be a second predetermined number, and the second predetermined number of spring pins 530 may be evenly distributed along the circumference of the second disc 500, and the anvil 100 is in a locked state to ensure the stability of the spring pins 530 on the positioning shaft 300. Accordingly, the number of the slide slots 640 may be equal to the number of the spring pins 530 and equal to the second predetermined number, and the second predetermined number may be one, two, three, four, five, six or more.

[0081] In addition, if Figure 5 and Fig. 9 As shown, the limiting sleeve 510 can be cylindrical, and the limiting sleeve 510 can be sleeved on the outer side of the positioning claw 610 and the cylindrical part. The end of the limiting sleeve 510 close to the anvil 100 is formed with a clamping hole 520 that penetrates the limiting sleeve 510. When the anvil 100 is in the locked state, the side of the flange close to the first axis 001 abuts against the clamping groove 220, and the other side of the flange is limited by the clamping hole 520. When the anvil 100 is in the locked state, the limiting sleeve 510 realizes the position locking of the limiting sleeve 200 and the transmission part 600, which is defined as the left end locked state.

[0082] In an embodiment, Figure 1 As shown, the anastomosis device may include a shell and a stop key, the anastomosis component is arranged in the shell, the stop key is fixedly connected to the first one of the shell and the anastomosis component, the second one of the shell and the anastomosis component is formed with a key slot adapted to the stop key, and when the stop key is arranged in the key slot, the stop key limits the relative rotation between the anastomosis component and the shell.

[0083] Preferably, the anastomosis assembly may further include a stop portion 700, the stop key being connected to the stop portion 700, the shell may be formed as a cylindrical tube, the axis of the cylindrical tube coincides with the above-mentioned first axis 001, the keyway is arranged on the side wall 010 of the above-mentioned shell, and the keyway is formed as a through groove extending in the direction of the first axis 001.

[0084] Optionally, the anti-rotation portion 700 is formed with an anti-rotation groove 011, part of the anti-rotation key is arranged in the anti-rotation groove 011, and the other part of the anti-rotation key is arranged in the key slot, and the anti-rotation key is respectively engaged with the key slot and the anti-rotation groove 011, so as to achieve the purpose of limiting the relative rotation between the anastomosis assembly and the shell.

[0085] Preferably, if Figure 7 As shown, the anti-rotation part 700 can be formed as a cylinder, the axis of the cylinder coincides with the first axis 001, and the anti-rotation part 700 is formed with a transmission hole passing through the anti-rotation part 700 along the direction of the first axis 001, and the above-mentioned transmission part 630 is arranged in the transmission hole.

[0086] Preferably, if Figure 1 and Fig. 9As shown, the stapler includes a driving motor 800 and a lead screw 810, wherein the lead screw 810 is disposed on one side of the driving motor 800 close to the anvil 100, and the lead screw 810 is coaxially disposed with the driving motor 800, and the lead screw 810 passes through the transmission hole and cooperates with the transmission part 630 to drive the transmission part 600 to move along the first axis 001. Accordingly, the transmission part 630 may be cylindrical, and the transmission part 630 is provided with an internal thread that cooperates with the lead screw 810. Optionally, the driving motor 800 may have forward and reverse rotation functions, so that in the direction of the first axis 001, the motor can drive the transmission part 600 to move away from and close to the motor.

[0087] In an embodiment, Figure 8 and Fig. 9 As shown, the anastomosis assembly further includes a receiving portion 900 and a third predetermined number of claw hook portions 910 . The receiving portion 900 is connected to the shell, and the receiving portion 900 is formed with a receiving cavity for receiving the above-mentioned driving motor 800 .

[0088] Alternatively, if Fig. 9 As shown, a anti-rotation head is formed on the right side of the above-mentioned driving motor 800, and the anti-rotation head can be formed with two surfaces parallel to each other. The above-mentioned accommodating cavity is formed with an accommodating hole matching the cross-section of the anti-rotation head to prevent the driving motor 800 and the accommodating portion 900 from rotating relative to each other.

[0089] Preferably, if Figure 7 , Figure 8 and Fig. 9 As shown, the claw hook portion 910 is connected to one side of the accommodating portion 900 close to the anti-rotation portion 700, and an annular groove 720 is formed on the outer side of one end of the anti-rotation portion 700 close to the driving motor 800. When the claw hook portion 910 is set in the state of the annular groove 720, the claw hook portion 910 can limit the movement of the anti-rotation portion 700 along the direction of the first axis 001. At this time, the driving motor 800 is locked in the direction of the first axis 001 under the joint action of the anti-rotation portion 700, the claw hook portion 910 and the accommodating portion 900 (the locking of this state is defined as right-end locking).

[0090] Alternatively, if Figure 7 and Fig. 9 As shown, the anti-rotation portion 700 is formed with a claw groove 730 extending in a predetermined direction. The claw groove 730 is arranged on the right side of the annular groove 720 to facilitate the above-mentioned claw hook portion 910 to slide into / out of the annular groove 720 along the claw groove 730.

[0091] In an embodiment, the anastomosis assembly may further include an anastomosis portion 400, such as Figure 1 and Fig. 9As shown, the anastomotic part 400 is arranged opposite to the anvil 100, and an ejector column 410 is arranged on the side of the anastomotic part 400 facing away from the anvil 100, and the ejector column 410 extends along the first axis 001 direction, and the above-mentioned anti-rotation part 700 is formed with an ejector hole 710 penetrating the anti-rotation part 700 along the first axis 001 direction, and the ejector hole 710 is connected with the annular groove 720, and the ejector column 410 penetrates the above-mentioned first disc 620 and extends into the ejector hole 710. When the ejector column 410 extends into the ejector hole 710 exceeding a predetermined depth (the predetermined depth refers to the distance from the left end of the anti-rotation part 700 to the left side of the annular groove 720), the ejector column 410 can act on the claw hook part 910 to eject the claw hook part 910 out of the annular groove 720, so as to realize the unhooking action of the above-mentioned claw hook part 910.

[0092] Preferably, if Figure 1 As shown, the anastomotic portion 400 is arranged on the left side of the above-mentioned second disc 500, and the above-mentioned ejection column 410 passes through the second disc 500 and is arranged in the above-mentioned ejection portion. In this way, the anti-rotation column passes through the second disc 500, the first disc 620 and the ejection portion in sequence and is then arranged in the anti-rotation portion 700 to prevent the anastomotic portion 400, the first disc 620 and the second disc 500 from rotating relative to the shell.

[0093] Alternatively, if Figure 1 As shown, the transmission part 600 further includes a rotation-stopping tube 650, which is disposed on a side of the first disc 620 away from the anvil 100, and is sleeved on the outer side of the ejector post 410. When the ejector post 410 penetrates the first disc 620 and extends into the ejector hole 710, the rotation-stopping tube 650 is disposed between the ejector hole 710 and the ejector post 410 to further prevent the first disc 620 and the housing from rotating relative to each other.

[0094] Optionally, the number of ejector columns 410, anti-rotation tubes 650, ejector holes 710 and claw hooks 910 are all equal to the third predetermined number mentioned above, and the third predetermined number can be greater than or equal to three to reduce the probability of the anastomosis part 400, the first disc 620 and the second disc 500 rotating relative to the shell.

[0095] Preferably, the anastomotic portion 400 may be formed as a titanium staple groove.

[0096] Preferably, the anastomotic portion 400 may be formed as a circular cutting blade.

[0097] In this embodiment, if Figure 1 and Figure 2As shown, the shell may further include a tail stock 020, wherein the tail stock 020 is disposed on a side of the side wall 010 of the shell away from the stapler assembly, the accommodating portion 900 is connected to the tail stock 020, and a gripping portion 022 is disposed at the end of the tail stock 020 away from the anastomosis portion 400, wherein the gripping portion facilitates clamping of the stapler.

[0098] Preferably, if Figure 1 As shown, an outer side of the end of the accommodating portion 900 away from the anvil 100 is formed with an external thread, and an inner wall of the tail stock 020 is formed with an internal thread matching the external thread. In this way, when the stapler is in the following state where the left and right ends are locked at the same time, the depth of the accommodating portion 900 being screwed on the tail stock 020 is adjusted to change the distance between the anastomotic portion 400 and the anvil 100, so that the stapler can adapt to different patients or different wound thicknesses at different wound locations.

[0099] Preferably, if Figure 2 As shown, an annular groove 021 is formed on the outer side of the tail stock 020, and the shell further includes a support portion 030, which is connected to the side wall 010 of the shell, and the support portion 030 is arranged in the above-mentioned annular groove 021. In this way, the clamping action of the support portion 030 and the annular groove 021 effectively prevents the tail stock 020 and the side wall 010 of the shell from relative movement in the direction of the first axis 001.

[0100] Optionally, the shell further includes a screw, which extends along the radial direction of the shell side wall 010 , and the screw penetrates the shell side wall 010 and is connected to the support portion 030 .

[0101] In addition, the support portion 030 may include a first half ring 031 and a second half ring 032, and the first half ring 031 and the second half ring 032 may form a complete circular ring that matches the above-mentioned annular groove 021, so that it is convenient to set the support ring in the annular groove 021 while improving the clamping stability of both the support portion 030 and the annular groove 021.

[0102] Based on the characteristics described above, Figures 1 to 10 The illustrated stapler is described as an example, and the working principle of the stapler will be described in detail below.

[0103] Working principle of the anvil locking process: the claw hook 910 is placed in the annular groove 720, and the right end of the stapler is locked. Then, the motor 800 rotates forward (without axial displacement), and the driving motor 800 drives the screw 810 to rotate forward. The transmission part 600 is provided with an internal thread that cooperates with the screw 810, so when the motor 800 rotates forward, the transmission part 600 moves to the right. The positioning claw 610 cooperates with the card slot 220 through the flange, and the spring pin 530 cooperates with the slide slot 640. Under the action of the hooking force of the positioning claw 610 and the card slot 220, the anvil 100, the anastomotic part 400, and the first disc 620 are driven to move to the right. At this time, the second disc 500 stops moving due to the friction force of the spring in the spring pin 530 against the side wall. When the positioning claw 610 moves to the right beyond the hole of the card hole 520, the anvil 100 and the transmission part 600 are interlocked, and the anvil 100 cannot be pulled out at this time. The anvil 100 and the transmission part 600 continue to move to the right, and the spring pin 530 runs to the right side in the slide groove 640, driving the second disc 500 to move to the right together, until the ejection column 410 passes through the ejection hole 710. When the ejection column 410 extends into the ejection hole 710 to a predetermined depth, the flange abuts against the card slot 220 and is restricted by the card hole 520. The spring pin 530 just passes through the slide groove 640 and falls into the annular groove 310. At this time, the left end is locked (that is, the stapler is in a state where the left and right ends are locked at the same time).

[0104] How the nailing or circumcision process works:

[0105] When the stapler is locked at both the left and right ends, Fig. 9 As shown, the driving motor 800 is controlled to rotate forward, the ejection column 410 extends into the ejection hole 710 beyond the predetermined depth, and the ejection column 410 ejects the claw hook portion 910 out of the annular groove 720, releasing the restriction of the claw hook portion 910 on the driving motor 800 (at this time, it is in a state of only left-side locking). Due to the left-side locking, the spacing between the anvil 100, the first disc 620 and the second disc 500 is locked. At this time, the transmission part 600 does not move. Subsequently, the driving motor 800 approaches the transmission part 600 (that is, the driving motor 800 moves to the left), and the driving motor 800 drives the anti-rotation part 700 and the anastomotic part 400 to move to the left together, so that the spacing between the anvil 100 and the anastomotic part 400 is reduced to achieve the nailing / circumcision action.

[0106] Working principle of the anvil rotation removal process:

[0107] After the above-mentioned circumcision / nail-driving action is completed, when the anvil 100 needs to be removed from the wound, the second disc 500 and the transmission part 600 do not move first, and the drive motor 800 is controlled to reverse, and the drive motor 800 drives the anti-rotation part 700 to move in the direction away from the transmission part 600 (that is, the drive motor 800 moves to the right), until the claw hook part 910 slides into the annular groove 720, at which time, the ejector column 410 exits the annular groove 720, and the right side is locked. Then the drive motor 800 continues to reverse. Since the drive motor 800 is locked, at this time in the direction of the first axis 001, the drive motor 800 does not move, and the transmission part 600 resists the friction force of the second disc 500 and the transmission part 600 to move in the direction away from the drive motor 800 (that is, the transmission part 600 moves to the left), and the corresponding positioning claw 610 pushes the limiting sleeve 200 to move to the left, and at this time the position of the second disc 500 does not change (that is, the position of the positioning shaft 300 limited by the spring pin 530 does not change), as shown in FIG. Fig.10 As shown, this causes the limiting sleeve 200 and the positioning shaft 300 to move relative to each other in the direction of the first axis 001, and the eccentric hinge beam 320 slides to the right under the pull of the positioning shaft 300, causing the anvil 100 to rotate, thereby reducing the space required for the stapler to be removed. Reducing the size of the removal port is conducive to wound healing and reduces the risk of tearing the wound when the stapler is removed. The distance between the anvil 100 and the anastomotic part 400 can be adjusted by rotating the tailstock 020, which can adapt to different intestinal wall thicknesses and improve the quality of surgery.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An implantable fully intracavitary electric tubular stapler, characterized in that: include: Anvil, An anastomosis assembly is arranged opposite to the anvil, and the distance between the anastomosis assembly and the anvil is adjustable in a predetermined direction; A rotating assembly, the anvil is connected to the anastomosis assembly via the rotating assembly, and the rotating assembly is used to change the angle between the anvil and the predetermined direction; The stapler comprises a housing and a rotation-stop key, the stapler assembly is arranged in the housing, a first one of the housing and the stapler assembly is connected to the rotation-stop key, a second one of the housing and the stapler assembly is formed with a key slot adapted to the rotation-stop key, and the rotation-stop key is arranged in the key slot to restrict the relative rotation between the stapler assembly and the housing; The anastomosis assembly further includes a rotation-stopping portion, the rotation-stopping key is connected to the rotation-stopping portion, the housing is formed as a cylindrical tube, the axis of the cylindrical tube extends along the predetermined direction, the keyway is provided on the side wall of the housing, and the keyway is formed as a through groove extending along the axis direction of the cylindrical tube; The anti-rotation part is formed as a cylinder, the axis of the cylinder coincides with the axis of the cylindrical barrel, and the anti-rotation part is formed with a transmission hole penetrating the anti-rotation part along the axis direction of the cylinder; The stapler comprises a driving motor and a lead screw, wherein the lead screw is coaxially arranged with the driving motor and passes through the transmission hole; The anastomosis assembly further comprises a transmission part, which is arranged on a side of the anti-rotation part away from the drive motor, a first end of the transmission part is connected to the anvil, and a second end of the transmission part cooperates with the lead screw, so that the drive motor drives the anvil to move along the axis; The anastomosis assembly further comprises a receiving portion and a predetermined number of claw hook portions, wherein the receiving portion is connected to the housing, the receiving portion is formed with a receiving cavity, the receiving cavity is used to receive the driving motor, the claw hook portion is connected to a side of the receiving portion close to the anti-rotation portion, and the predetermined number of claw hook portions are evenly distributed along the circumference of the receiving portion; An annular through groove is formed on the outer side of the anti-rotation part at one end close to the driving motor, and when the claw hook part is arranged in the annular through groove, the claw hook part can limit the anti-rotation part from moving along the axial direction; The anastomosis assembly also includes an anastomosis part, which is arranged opposite to the anvil, and an ejector column is arranged on the side of the anastomosis part facing away from the anvil, and the ejector column extends along the axial direction, and the anti-rotation part is formed with an ejector hole that penetrates the anti-rotation part along the axial direction, and the ejector hole is communicated with the annular through groove, and the ejector column penetrates the placement part included in the transmission part and extends into the ejector hole. When the ejector column extends into the ejector hole beyond a predetermined depth, the ejector column can act on the claw hook part to eject the claw hook part out of the annular through groove.

2. The stapler according to claim 1, characterized in that: The transmission part includes a transmission part and a placement part connected to each other, the transmission part is arranged on a side of the placement part away from the anvil, and the transmission part is formed with an internal threaded hole arranged along the axial direction, and the internal threaded hole cooperates with the lead screw.

3. The stapler according to claim 2, characterized in that: The number of the ejector pins is equal to the predetermined number, and the predetermined number is greater than or equal to three.

4. The stapler according to claim 3, characterized in that: The anastomotic portion is formed as a circular cutting blade or a titanium nail groove.

5. The stapler according to claim 1, characterized in that: The shell comprises a tailstock, which is arranged on a side of the side wall away from the anvil, the accommodating portion is connected to the tailstock, and a gripping portion is arranged at the end of the tailstock away from the anastomosis portion, which facilitates the clamp to grip the stapler.

6. The stapler according to claim 5, characterized in that: An external thread is formed on the outer side of one end of the accommodation portion away from the anvil; The inner wall of the tailstock is formed with an internal thread matching the external thread, and the outer side of the tailstock is formed with an annular groove. The housing further comprises a supporting portion connected to the side wall, and the supporting portion is disposed in the annular groove to limit relative movement between the tailstock and the side wall in the axial direction.

7. The stapler according to claim 1, characterized in that: The anvil is formed as a body of revolution, and the axis of the anvil coincides with the axis; The stapler further comprises a limiting sleeve, which is arranged on a side of the anvil facing the anastomosis assembly, and the limiting sleeve and the anvil are hinged at a center position of the anvil.

8. The stapler according to claim 7, characterized in that: The limiting sleeve is formed with a first hole penetrating the limiting sleeve along the axial direction; The rotating assembly comprises an eccentric hinge beam and a positioning shaft, wherein the positioning shaft is arranged in the first hole, one end of the eccentric hinge beam is hinged to one end of the positioning shaft close to the anvil, and the other end of the eccentric hinge beam is hinged to a position of one side of the anvil deviating from the center position; A portion of the hole wall of the first hole corresponding to the eccentric hinge beam is open, so that the eccentric hinge beam can slide along the axial direction.

9. The stapler according to claim 8, characterized in that: A positioning claw groove is formed at one end of the limiting sleeve away from the anvil, and the positioning claw groove extends along the axis direction; The first end of the transmission part is formed with a positioning claw extending along the axial direction, and the positioning claw extends into the positioning claw groove from the side of the limiting sleeve away from the anvil. When the positioning claw extends into the positioning claw groove to reach a predetermined position, the transmission part can drive the limiting sleeve to move in the axial direction.

10. The stapler according to claim 9, characterized in that: The anastomosis assembly further comprises a limiting sleeve and a limiting pin portion connected to each other, wherein the limiting sleeve is arranged on a side of the limiting pin portion close to the anvil, and the limiting sleeve and the limiting pin portion are both sleeved on the outer side of the positioning claw.

11. The stapler according to claim 10, characterized in that: The positioning shaft is arranged on the limiting sleeve, and one end of the positioning shaft away from the anvil is exposed to the outside of the limiting sleeve, and the one end of the positioning shaft is formed with an annular groove extending along the circumference of the positioning shaft; The limiting pin portion includes a spring pin extending in a direction perpendicular to the axis, and a slide groove extending in the axis direction and penetrating the positioning claw is formed at one end of the positioning claw away from the anvil, the spring pin is arranged in the slide groove, and the annular groove is exposed in the slide groove; When the anvil is in a locked state, one end of the positioning shaft close to the anvil abuts against the anvil, and the spring pin penetrates the slide groove and falls into the annular groove.

12. The stapler according to claim 10, characterized in that: The inner side of one end of the positioning claw close to the anvil is formed with a flange protruding toward the axis; A clamping groove is formed at one end of the positioning claw groove close to the anvil; A clamping hole penetrating through the limiting sleeve is formed at one end of the limiting sleeve close to the anvil; When the positioning claw extends into the positioning claw groove to reach a predetermined position, the side of the flange close to the axis abuts against the clamping groove; When the anvil is in a locked state, the positioning claw extends into the positioning claw groove to reach a predetermined position, and the other side of the flange is limited by the clamping hole.

13. The stapler according to claim 7, characterized in that: A ring-shaped anvil is formed on one side of the anvil facing the anastomosis assembly, and a stapling groove is formed on the anvil.

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