A tube type anastomat

Abstract

The present application belongs to the technical field of medical devices, in particular to the field of surgical devices. The tube type anastomat provided by the present application comprises a stopper, and the actuating rod is provided with a stop structure. The stopper is connected to the shell and can be selectively engaged with the stop structure. When the stopper and the stop structure are engaged, the actuating rod is located at a set position, and the staple cartridge and the anvil are in a minimum open state. Thus, through the cooperation of the stopper and the stop structure, the actuating rod can stay at the set position, and the staple cartridge and the anvil can stay at the minimum open state. The operator does not need to record the number of rotations of the knob again, and can conveniently ensure that the staple cartridge and the anvil can stably be in a good minimum open state, thereby reducing the operation time, reducing the operation difficulty, and improving the operation success rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical instruments, and in particular to the field of surgical instruments. Background Art

[0002] A tubular stapler comprises a tubular housing, a knob, an actuator rod, an anvil, and a staple cartridge. The knob is rotatably fixed to the proximal end of the tubular housing, while the anvil and staple cartridge are located at the distal end of the tubular housing. The actuator rod extends through the tubular housing, with its proximal end threadedly engaged with the knob. Based on the screw-nut principle, rotation of the knob translates into axial movement of the actuator rod between a first position and a second position. The distal end of the actuator rod is connected to the anvil in a manner that allows for variable distance between the staple cartridge and the anvil. Thus, in the first position, the staple cartridge and the anvil are in an open state, while in the second position, the staple cartridge and the anvil are in a closed state, thereby clamping the tissue layers. Generally, after clamping the tissue layers and completing the suture, the knob is rotated a predetermined number of times to cause the actuator rod to move from the second position to a position between the first and second positions. In this position, the distance between the staple cartridge and the anvil is greater than in the closed state but less than in the open state, referred to as the "minimum open state." When the staple cartridge and the staple anvil are in the "minimum open state", the distance between the staple cartridge and the staple anvil allows the intestinal tissue connected to the human body to freely leave the contact surface between the staple cartridge and the staple anvil (basically equivalent to the pitch corresponding to rotating the knob half a turn to three-quarters of a turn, which is approximately 2 mm). The distance between the staple cartridge and the staple anvil cannot be too large, otherwise the outer wall of the intestine will sag when the tubular stapler is pulled out, causing a pull on the intestine. Therefore, when pulling out the tubular stapler, it is a common pursuit in this field to ensure that the staple cartridge and the staple anvil are in the minimum open state. However, in actual use, the operator often forgets how many turns they have made, resulting in the staple cartridge and the staple anvil being opened too large or too small. Summary of the Invention

[0003] (1) Technical issues to be resolved

[0004] The purpose of the present invention is to solve the technical problem in the prior art that the operator forgets the number of turns of the knob, resulting in the nail magazine and the nail anvil being opened too much or too little.

[0005] (2) Technical solution

[0006] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] The present invention provides a tubular anastomosis device, comprising a tubular shell, a knob, an actuating rod, a nail anvil seat and a nail magazine, wherein the knob is rotatably fixed to the proximal end of the tubular shell, the actuating rod is passed through the tubular shell, the proximal end of the actuating rod is screwed with the knob, and the distal end of the actuating rod is connected to the nail anvil in a manner that can change the distance between the nail anvil seat and the nail magazine, and the rotation of the knob can be converted into the movement of the actuating rod between a first position and a second position, when the actuating rod is in the first position, the nail magazine and the nail anvil seat are in an open state, and when the actuating rod is in the second position, the nail magazine and the nail anvil seat are in a closed state; a stopper is also included, and the actuating rod is screwed to the proximal end of the tubular shell. The rod is also provided with a stop structure, which is a convex block or annular protrusion protruding from the outer wall of the actuating rod, or a plug rod or plug inserted into the actuating rod; the stop member is connected to the tubular shell and can be selectively engaged with the stop structure. When the stop member and the stop structure are engaged, the actuating rod is located in a set position, and the nail magazine and the nail anvil are in a minimum open state; a plurality of slots spaced apart and passing through the side walls of the tubular shell are provided on the tubular shell along its axial direction, and the stop member is a plug that can move along the slot between the stop position and the yield position, and the plug can be selectively inserted into any of the slots. The outer end protrudes from the tubular shell so that the operator can pull out the plug to move it to the yield position; or a through groove is provided on the side wall of the tubular shell, and the stop member is inserted in the through groove and can move up and down along the through direction of the through groove. The tubular anastomosis device also includes a stop driving member that can move between an open position and a closed position. The stop driving member is connected to the stop member to drive the stop member to move between the stop position and the yield position. The stop driving member and the stop member can slide along the axial through groove on the tubular shell as a whole. When the stop driving member is in the open position, the stop member is in the stop position. When the drive member is in the closed position, the stop member is in the yield position; when the knob is rotated in the first direction to cause the actuating rod to move from the first position to the second position, the drive stop member is in the yield position where it does not engage with the stop structure; before the knob is rotated in the second direction to cause the actuating rod to move from the second position to the first position, the drive stop member is in the stop position where it can engage with the stop structure, and then the knob is rotated in the second direction, the actuating rod moves from the second position toward the first position and when the stop structure engages with the stop member, the actuating rod is prevented from continuing to move, forming a sense of being in place.

[0008] According to the present invention, the inserting piece has a channel; when the inserting piece is at the stopping position, the actuating rod passes through the channel and the stopping structure can stop on the inserting piece.

[0009] According to the present invention, the channel is U-shaped and open at the inner end of the stopper, and the insert is pulled out of the slot to form the insert in the yield position, or, when the insert is in the yield position, it remains inserted in the slot, and the stop structure can pass through the channel; or two radially symmetrical slots are provided on the side wall of the tubular shell, and the insert is inserted in the two slots, and the channel is runway-shaped, elliptical or circular, and when the insert is in the yield position, the stop structure can pass through the channel, and when the insert is in the stop position, the channel is eccentric to the actuating rod.

[0010] According to the present invention, the outer end of the insert has a limiting step.

[0011] According to the present invention, the stopper driving member is a button, which is hingedly connected to the tubular housing; and a first end of the button is hingedly connected to an outer end of the stopper.

[0012] According to the present invention, a first thread segment and a second thread segment are provided at the proximal end of the actuating rod, the first thread segment is located proximal to the second thread segment and the pitch of the first thread segment is smaller than the pitch of the second thread segment; the knob is connected to a nut, the pitch of the internal thread of the nut is larger than the pitch of the internal thread of the knob, and the internal thread of the nut is located distal to the internal thread of the knob.

[0013] (3) Beneficial effects

[0014] The beneficial effects of the present invention are:

[0015] The tubular stapler of the present invention, through the cooperation of the stopper and the stop structure, can retain the actuating rod in the set position, and the staple cartridge and anvil can be kept in the minimum extension state. The operator no longer needs to count the number of turns of the knob, and can conveniently ensure that the staple cartridge and anvil are stably and optimally extended to the minimum extent, thereby reducing surgical time, reducing surgical difficulty, and improving surgical success rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional schematic diagram of the tubular stapler provided in Example 1;

[0017] Figure 2 for Figure 1 A schematic longitudinal section diagram of the proximal end of the tubular stapler in FIG. 1 , wherein the stopper is located at the stop position;

[0018] Figure 3 for Figure 1 A schematic longitudinal section diagram of the proximal end of the tubular stapler in FIG. 1 , wherein the stopper is in a yielding position;

[0019] Figure 4 for Figure 1 A schematic cross-sectional view of the proximal end of the tubular stapler in FIG. 1 , wherein the stopper is located at the stop position;

[0020] Figure 5This is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in Example 2, where the stopper is located at the stop position;

[0021] Figure 6 This is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in Example 2, where the stopper is in the yielding position;

[0022] Figure 7 This is a schematic cross-sectional view of the proximal end of the tubular stapler provided in Example 2, where the stopper is located at the stop position;

[0023] Figure 8 This is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in Example 3, where the stopper is located at the stop position;

[0024] Figure 9 This is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in Example 3, where the stopper is in the yielding position;

[0025] Figure 10 This is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in Example 4, where the stopper is located at the stop position;

[0026] Figure 11 This is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in Example 5, where the stopper is in the yielding position;

[0027] above Figure 2-Figure 11 This is a schematic diagram only and details are simplified, such as the threads on the actuator rod, nut, and knob are not shown.

[0028] [Description of Reference Numerals]

[0029] 1: Tubular shell;

[0030] 2: Knob;

[0031] 3: Actuating rod;

[0032] 4: nail anvil;

[0033] 5: Nail magazine;

[0034] 6: slot;

[0035] 7: channel;

[0036] 8: Insert;

[0037] 9: Stop structure;

[0038] 10: Limiting step;

[0039] 11: nut;

[0040] 12: Arc-shaped snap buckle;

[0041] 13: Trail section;

[0042] 14: Large diameter section;

[0043] 15: button;

[0044] 16: through slot;

[0045] 17: Stopper. DETAILED DESCRIPTION

[0046] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments. In the following description, the end closest to the operator during use is referred to as "near," and the end farthest from the operator is referred to as "far."

[0047] Example 1

[0048] See also Figures 1 to 4 This embodiment provides a tubular stapler. The tubular stapler includes a tubular housing 1, a knob 2, an actuating rod 3, a staple anvil 4, and a staple cartridge 5. Of course, other common existing structures of tubular staplers are also included. Structures not related to the present invention will not be described in detail here.

[0049] The knob 2 is rotatably fixed to the proximal end of the tubular housing 1, that is, the knob 2 can only rotate along its own axis and cannot move. The rotation axis of the knob 2 is parallel to the axis of the tubular housing 1, and preferably coincides.

[0050] The anvil 4 and the staple cartridge 5 are located at the distal end of the tubular housing 1. The anvil 4 and the staple cartridge 5 are used to clamp tissue between them and further perform staple suturing and cutting by closing. In this embodiment, the arrangement direction of the anvil 4 and the staple cartridge 5 is consistent with the axial direction of the tubular housing 1, and the anvil 4 is located distal to the staple cartridge 5.

[0051] The actuating rod 3 is disposed within the tubular housing 1. The proximal end of the actuating rod 3 has a thread, and the knob 2 has a threaded hole, so that the actuating rod 3 and the knob 2 are screwed together. According to the screw-nut principle, the rotation of the knob 2 about its axis can be converted into the axial movement of the actuating rod 3 between a first position and a second position. In this embodiment, the first position is located distal to the second position, that is, when the knob 2 is rotated in the first direction, the actuating rod 3 moves from the first position to the second position, and when the knob 2 is rotated in the second direction, the actuating rod 3 moves from the second position to the first position. The distal end of the actuating rod 3 is connected to the anvil 4 directly or through other existing structures such as an axis to enable the distance between the nail magazine 5 and the anvil 4 to be changed. In this way, when the actuating rod 3 is in the first position, the nail magazine 5 and the nail anvil 4 are in an open state, and when the actuating rod 3 is in the second position, the nail magazine 5 and the nail anvil 4 are in a closed state to clamp the tissue layer. In other words, the process of the actuating rod 3 moving from the first position to the second position drives the nail anvil 4 to move toward the nail magazine 5, and the process of the actuating rod 3 moving from the second position to the first position drives the nail anvil 4 to move away from the nail magazine 5.

[0052] Reference Figure 2 In this embodiment, the tubular anastomosis device further comprises a stopper, and a stopper structure 9 is further provided on the actuating rod 3. The stopper is connected to the tubular housing 1 and can be selectively engaged with the stopper structure 9. When the stopper and the stopper structure 9 are engaged (refer to Figure 2 ), the actuating rod 3 is in the set position (the set position is between the first position and the second position, determined by the axial position of the stopper), the staple cartridge 5 and the staple anvil 4 are in the minimum open state, and this "minimum open state" is that the distance between the staple cartridge and the staple anvil allows the intestinal tissue connected to the human body to freely leave the contact surface between the staple cartridge and the staple anvil (basically equivalent to the pitch corresponding to half a turn to three-quarters of a turn of the knob, which is approximately 2 mm); at the same time, the distance between the staple cartridge and the staple anvil is not too large, otherwise the outer wall of the intestine will be concave when the tubular anastomosis device is pulled out, causing pulling on the intestine. When the stopper does not need to engage with the stop structure 9, the stopper moves to the yield position (refer to Figure 3 ), the axial movement of the actuating rod 3 is not stopped by the stopper. Through the cooperation of the stopper and the stop structure 9, when the knob 2 is rotated in the first direction to cause the actuating rod 3 to move from the first position to the second position, the stopper is selected to be in a position where it does not engage with the stop structure 9, i.e., the yield position; before the knob 2 is rotated in the second direction to cause the actuating rod 3 to move from the second position to the first position, the stopper is selected to be in a position where it can engage with the stop structure 9, i.e., the stop position, and then the knob 2 is rotated in the second direction, the actuating rod 3 moves from the second position toward the first position and when the stop structure 9 engages with the stopper, the actuating rod 3 is prevented from continuing to move, forming a sense of being in place, so that the operator knows that the staple cartridge 5 and the staple anvil 4 are already in the minimum open state, and this state can be maintained to separate the tubular stapler from the human body.

[0053] In this way, the operator no longer needs to record the number of rotations of the knob 2, and can conveniently ensure that the nail magazine 5 and the nail anvil 4 can be stably in a good minimum opening state, thereby reducing the operation time, reducing the difficulty of the operation, and improving the success rate of the operation.

[0054] Further references Figures 2 to 4 In this embodiment, a slot 6 is provided on the side wall of the tubular housing 1 and passes through the side wall. The stopper is capable of moving along the slot 6 at the stop position (refer to Figure 2 ) and yield position (refer to Figure 3 ) and forms a sliding fit with the slot 6. When the insert 8 is in the stop position, the outer end of the insert 8 protrudes from the tubular housing 1, allowing the operator to easily pull the insert 8 outward to move it to the yield position. The yield position can be implemented so that the insert 8 is completely removed from the slot 6, or it can be implemented so that the insert 8 does not separate from the tubular housing 1 in the yield position (in which case the yield position is outside the stop position). This embodiment uses the latter as an example.

[0055] Specifically, the insert 8 has a channel 7, which is U-shaped and opens at its inner end (the end positioned within the tubular housing 1 when inserted). In other words, the insert 8 forms an overall U-shape, with the open end of the U inserted into the slot 6. It is understood that this opening is intended to be inserted outside the actuating rod 3, i.e., to allow the actuating rod 3 to pass through. Accordingly, the stop structure 9 is a structure that protrudes radially from the actuating rod 3. In this embodiment, it comprises two protrusions arranged at 180° angles. However, the present invention is not limited to this. The stop structure 9 can be a rod member inserted into the actuating rod 3 with protrusions at both ends, or it can be at least three protrusions surrounding the stop structure 9, or it can be an annular boss. In this way, regardless of the orientation of the actuating rod 3, it can form abutment with the insert 8. Of course, if the ease of installation of the actuating rod 3 is not a consideration, the stop structure 9 can also be a single protrusion protruding radially from the actuating rod 3 to achieve mating with the insert 8.

[0056] In addition, the outer end of the insert 8 has a limiting step 10, and when the limiting step 10 abuts against the outer wall of the tubular housing 1, the insert 8 is located at a stop position, thereby preventing the insert 8 from being inserted too deeply or not deeply enough.

[0057] Reference Figure 3 When the insert 8 is in the yield position, the stop structure 9 can pass through the channel 7 along with the actuating rod 3 without hindering the actuating rod 3 from moving from the first position to the second position or from moving from the second position to the first position.

[0058] Reference Figure 2 When the insert 8 is at the stop position, the actuating rod 3 can pass through the channel 7 , but the stop structure 9 cannot pass through the channel 7 , and the stop structure 9 stops on the insert 8 .

[0059] The process of extracting the tubular stapler from the human body is described as follows:

[0060] S1, driving the insert 8 to move from the yield position to the stop position;

[0061] S2, the driving knob 2 is rotated in the second direction, and the actuating rod 3 moves from the second position toward the first position until the stop structure 9 abuts the insert 8. The actuating rod 3 stays at the set position, and the anvil 4 and the nail magazine 5 are in the minimum open state. The operator feels the sense of being in place and stops rotating the knob 2.

[0062] S3, pulling the tubular stapler out of the human body, and then driving the insert 8 to move from the stop position to the yield position;

[0063] S4. Continue to rotate the knob 2 in the second direction, and the actuating rod 3 continues to move from the second position toward the first position until it reaches the first position, and the tissue is released.

[0064] In this way, the design of the tubular stapler of this embodiment can continue to drive the anvil 4 and the staple cartridge 5 to open after the tubular stapler is pulled out of the human body, thereby facilitating the release of tissue.

[0065] Furthermore, in this embodiment, the proximal end of the actuating rod 3 can be provided with a first thread segment and a second thread segment with different pitches. The first thread segment is located proximal to the second thread segment and has a smaller pitch than the second thread segment. The knob 2 is connected to a nut 11. The pitch of the internal threads of the nut 11 is greater than the pitch of the internal threads of the knob 2 and is located distal to the internal threads of the knob 2. In this manner, the movement of the actuating rod 3 from the first position to the second position is initially faster and then slower.

[0066] Example 2

[0067] See also Figures 5 to 7 The difference between this embodiment and the first embodiment lies in the structure of the insert 8 and the arrangement of the slot 6.

[0068] Specifically, in this embodiment, two radially symmetrical slots 6 are provided on the side wall of the tubular housing 1, and the two ends of the insert 8 are respectively inserted into these two slots 6 to form a sliding connection. The channel 7 in the insert 8 is a closed through-hole, which is different from the open shape in the first embodiment. Whether the insert 8 is in the yield position or the stop position, the actuating rod 3 passes through the channel 7. When the insert 8 is in the stop position, the channel 7 is eccentric to the actuating rod 3; when the insert 8 is in the yield position, the channel 7 coincides with or substantially coincides with the center of the actuating rod 3. In this embodiment, the channel 7 is runway-shaped, but the present invention is not limited to this and can also be elliptical or circular.

[0069] See also Figure 6When the insert 8 is in the yielding position, the channel 7 is substantially concentric with the actuating rod 3 , and the stop structure 9 on the actuating rod 3 can pass through the channel 7 as the actuating rod 3 moves.

[0070] See also Figure 5 When the insert 8 is located at the stop position, the channel 7 is eccentric to the actuating rod 3 , and the stop structure 9 of the actuating rod 3 can engage with the insert area on one side of the channel 7 .

[0071] Preferably, when the insert 8 is in the yield position and the stop position, both ends of the insert 8 protrude from the tubular housing 1. Furthermore, a stop step 10 is provided at each end of the insert 8. When the insert 8 is in the yield position and the stop position, the stop steps 10 abut against the outer wall of the tubular housing 1. This ensures that the operator can feel the position of the insert 8 properly, preventing the insert 8 from moving inaccurately and causing a position switching failure.

[0072] The process of extracting the tubular stapler from the human body is described as follows:

[0073] S1, driving the insert 8 to move from the yield position to the stop position;

[0074] S2, the driving knob 2 is rotated in the second direction, and the actuating rod 3 moves from the second position toward the first position until the stop structure 9 abuts the insert 8. The actuating rod 3 stays at the set position, and the anvil 4 and the nail magazine 5 are in the minimum open state. The operator feels the sense of being in place and stops rotating the knob 2.

[0075] S3, pulling the tubular stapler out of the human body, and then driving the insert 8 to move from the stop position to the yield position;

[0076] S4. Continue to rotate the knob 2 in the second direction, and the actuating rod 3 continues to move from the second position toward the first position until it reaches the first position, and the tissue is released.

[0077] Example 3

[0078] See also Figure 8 and Figure 9 The difference between this embodiment and the first and second embodiments lies in the stopper and the stop structure 9.

[0079] In this embodiment, the stopper is an arc-shaped spring buckle 12, which is elastically connected to the tubular housing 1 and extends toward the interior of the tubular housing 1. The inner surface of the arc-shaped spring buckle 12 is an arc surface so that it contacts the actuating rod 3 without hindering the movement of the actuating rod 3.

[0080] Correspondingly, the proximal end of the actuating rod 3 includes a small-diameter section 13 and a large-diameter section 14 arranged from proximal to distal. The proximal end of the small-diameter section 13 is provided with threads for threaded engagement with the knob 2 and the nut 11. An annular step surface is formed at the junction of the small-diameter section 13 and the large-diameter section 14, which constitutes the stop structure 9. The annular step surface is inclined toward the distal side to facilitate further driving the anvil 4 and the staple cartridge 5 to open after the tubular stapler is removed.

[0081] See also Figure 9 When the actuating rod 3 is in the first position, the arc-shaped spring buckle 12 abuts against the outer peripheral surface of the large-diameter section 14, and the arc-shaped spring buckle 12 is in a compressed state. At this time, the arc-shaped spring buckle 12 is in a yielding position.

[0082] Combine Figure 8 and Figure 9 , during the movement of the actuating rod 3 from the first position toward the second position (i.e., from Figure 9 Exercise to Figure 8 During the actuating rod 3, when the annular step surface of the actuating rod 3 moves over the arc-shaped spring buckle 12, the small-diameter section 13 corresponds to the arc-shaped spring buckle 12, the stored energy of the arc-shaped spring buckle 12 is released, and the arc-shaped spring buckle 12 moves toward the actuating rod 3 until the stored energy of the arc-shaped spring buckle 12 is completely released or pressed against the small-diameter section 13, at which time the arc-shaped spring buckle 12 is at the stop position.

[0083] When the actuating rod 3 is located at the second position, the arc-shaped spring buckle 12 corresponds to the small-diameter section 13 and may or may not contact the small-diameter section 13 , and the arc-shaped spring buckle 12 is in a stop position.

[0084] In the process of the actuating rod 3 moving from the second position to the first position, when the annular step surface of the actuating rod 3 moves to the arc-shaped spring buckle 12, it is blocked (refer to Figure 8 ), the arc-shaped spring buckle 12 engages with the annular step surface, the actuating rod 3 is in the set position, the operator feels the sense of being in place, the operator knows that the nail magazine 5 and the nail anvil seat 4 are in the minimum opening state, and the tubular anastomosis device can be separated from the human body.

[0085] After the tubular stapler is pulled out from the human body, the knob 2 is rotated with greater force, and the actuating rod 3 continues to move from the set position to the first position. The annular step surface squeezes the arc-shaped spring buckle 12 while moving with the actuating rod 3. The arc-shaped spring buckle 12 is compressed and retracted to the final position. The arc-shaped spring buckle 12 is pressed against the large-diameter section 14, and the arc-shaped spring buckle 12 returns to the yield position.

[0086] Example 4

[0087] Reference Figure 10 and Figure 11In this embodiment, the tubular stapler further comprises a stopper driver connected to the stopper to drive the stopper to move between a stop position and a yield position. In this embodiment, the stopper driver is movable between an open position and a closed position. When the stopper driver is in the open position, the stopper is in the stop position, and when the stopper driver is in the closed position, the stopper is in the yield position. The movement of the stopper driver between the open position and the closed position may be rotation, radial movement of the tubular stapler, or axial movement of the tubular stapler.

[0088] In this embodiment, the stopper drive member is a button 15, which is located outside the tubular housing 1. The middle portion of the button 15 is hingedly connected to the tubular housing 1. The first end of the button 15 is hingedly connected to the outer end of a stopper (in this embodiment, a stopper plate 17), and the second end of the button 15 is a free end. A through slot 16 is provided on the side wall of the tubular housing 1. The stopper is inserted into the through slot 16 and moves up and down along the through direction of the through slot 16. When the first end of the button 15 is pressed, the first end of the button 15 moves inward to the open position, and the stopper extends into the interior of the tubular housing 1 to the stop position. When the second end of the button 15 is pressed, the first end of the button 15 moves outward to the closed position, and the stopper retracts toward the through slot 16 to a yield position.

[0089] The stopper in this embodiment may also be a stop rod.

[0090] The process of extracting the tubular stapler from the human body is described as follows:

[0091] S1. Press the first end of the button 15 to move it from the closed position to the open position, and drive the stopper to move from the yield position to the stop position;

[0092] S2, the driving knob 2 is rotated in the second direction, and the actuating rod 3 moves from the second position toward the first position until the stop structure 9 hits the stopper. The actuating rod 3 stays at the set position, and the anvil 4 and the nail magazine 5 are in the minimum open state. The operator feels the sense of being in place and stops rotating the knob 2;

[0093] S3. Pull the tubular stapler out of the human body, then press the second end of the button 15, so that the first end of the button 15 moves outward to the closed position and drives the stopper to move from the stop position to the yield position;

[0094] S4. Continue to rotate the knob 2 in the second direction, and the actuating rod 3 continues to move from the second position toward the first position until it reaches the first position, and the tissue is released.

[0095] In the above embodiments 1 to 4, the stop structure 9 is taken as a protrusion as an example, but the present invention is not limited to this. The stop structure 9 can be an annular protrusion on the actuating rod 3, a single protrusion, a plurality of protrusions arranged in an annular manner, an insertion rod or an insertion piece inserted into the actuating rod 3.

[0096] In addition, based on Examples 1 to 4, a circuit can be added to the actuating rod 3, and a circuit can also be added to the stop member. When the stop member and the stop structure are engaged, the two circuits are connected, the light on the circuit lights up or the generator on the circuit makes a sound.

[0097] Furthermore, based on Examples 1 through 4, the stopper is variably connected to the tubular housing 1 along its axial position. This allows the stopper's set position to be adjusted according to actual circumstances, thereby varying the distance between the staple cartridge 5 and the anvil 4 in the clamped state, thereby adapting to a wider range of situations. Furthermore, position markings are provided on the side of the tubular housing 1 on the stopper. These position markings correlate with the distance between the staple cartridge 5 and the anvil 4 in the clamped state, facilitating the operator's selection of the appropriate stopper position. For example, in Example 1, multiple slots 6 are provided along the axial direction of the tubular housing 1, allowing the insert 8 to be selectively inserted into any of these slots 6. For example, in Examples 1 and 2, the axial dimension of the slots 6 is greater than the thickness of the insert 8, allowing for fine axial adjustment of the insert 8. For example, in Example 3, the outer end of the arc-shaped snap hook extends out of the tubular housing 1 and is slidable along an axial groove in the tubular housing 1. For example, in Example 4, the stopper driver and the stopper are integrally slidable along an axial groove in the tubular housing 1.

[0098] In summary, the present invention can be applied not only to the intestines, but also to the stomach and esophagus. Although the stomach and esophagus will not have the same sinking problem as the intestines, a minimum opening state suitable for extraction still needs to be determined.

[0099] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tubular anastomosis device, comprising a tubular shell (1), a knob (2), an actuating rod (3), a nail anvil seat (4) and a nail magazine (5), wherein the knob (2) is rotatably fixed to the proximal end of the tubular shell (1), the actuating rod (3) is inserted into the tubular shell (1), the proximal end of the actuating rod (3) is screwed with the knob (2), and the distal end of the actuating rod (3) is connected to the nail anvil seat (4) in a manner capable of changing the distance between the nail anvil seat (4) and the nail magazine (5), and the rotation of the knob (2) can be converted into the actuating rod (3) moving between a first position and a second position, wherein when the actuating rod (3) is in the first position, the nail magazine (5) and the nail anvil seat (4) are in an open state, and when the actuating rod (3) is in the second position, the nail magazine (5) and the nail anvil seat (4) are in a closed state; characterized in that A stopper is also included, and a stopper structure (9) is provided on the actuating rod (3), wherein the stopper structure (9) is a convex block or an annular protrusion protruding from the outer wall of the actuating rod (3), or an insert rod or insert piece inserted into the actuating rod (3); The stopper is connected to the tubular housing (1) and can selectively engage with the stop structure (9); when the stopper and the stop structure (9) are engaged, the actuating rod (3) is located at a set position, and the nail magazine (5) and the nail anvil seat (4) are in a minimum open state; A plurality of slots (6) are provided on the tubular housing (1) along its axial direction and are spaced apart and penetrate the side wall of the tubular housing (1); the stopper is a plug (8) that can move along the slot (6) between a stop position and a yield position; the plug (8) can be selectively inserted into any of the slots (6); the outer end of the plug (8) protrudes from the tubular housing (1) so that an operator can pull out the plug (8) to move it to the yield position; or A through slot (16) is provided on the side wall of the tubular housing (1), the stopper is inserted into the through slot (16) and can move up and down along the through direction of the through slot (16), the tubular anastomosis device further comprises a stopper driving member that can move between an open position and a closed position, the stopper driving member is connected to the stopper to drive the stopper to move between the stop position and the yield position, the stopper driving member and the stopper as a whole can slide along the axial through slot (16) on the tubular housing (1), when the stopper driving member is in the open position, the stopper is in the stop position, and when the stopper driving member is in the closed position, the stopper is in the yield position; When the knob (2) is rotated in a first direction to cause the actuating rod (3) to move from a first position to a second position, the stop member is driven to be located in a yield position where it does not engage with the stop structure (9); Before the knob (2) is rotated in the second direction to cause the actuating rod (3) to move from the second position to the first position, the stop member is driven to be located at a stop position capable of engaging with the stop structure (9), and then the knob (2) is rotated in the second direction, the actuating rod (3) moves from the second position toward the first position and when the stop structure (9) engages with the stop member, the actuating rod (3) is prevented from continuing to move, thereby forming a sense of being in place.

2. The tubular anastomosis device according to claim 1, characterized in that: The insert (8) has a channel; When the insert (8) is in the stop position, the actuating rod (3) passes through the channel (7), and the stop structure (9) can stop on the insert (8).

3. The tubular anastomosis device according to claim 2, characterized in that: The passage (7) is in a U-shape that is open at the inner end of the stopper, and the insert (8) is pulled out of the slot (6) to form the insert (8) in a yielding position, or the insert (8) remains inserted in the slot (6) when it is in the yielding position, and the stopper structure (9) can pass through the passage (7); or Two radially symmetrical slots (6) are provided on the side wall of the tubular housing (1), the insert (8) is inserted into the two slots (6), the channel (7) is in the shape of a racetrack, an ellipse or a circle, and when the insert (8) is in the yield position, the stop structure (9) can pass through the channel (7), and when the insert (8) is in the stop position, the channel (7) is eccentric to the actuating rod (3).

4. The tubular anastomosis device according to claim 2, characterized in that: The outer end of the insert (8) has a limiting step (10).

5. The tubular anastomosis device according to claim 1, characterized in that: The stop driving member is a button (15), and the button (15) is hingedly connected to the tubular housing (1); The first end of the button (15) is hinged to the outer end of the stopper.

6. The tubular anastomosis device according to claim 1, characterized in that: The proximal end of the actuating rod (3) is provided with a first thread segment and a second thread segment, the first thread segment is located proximal to the second thread segment and the pitch of the first thread segment is smaller than the pitch of the second thread segment; The knob (2) is connected to a nut (11), the pitch of the internal thread of the nut (11) is greater than the pitch of the internal thread of the knob (2), and the internal thread of the nut (11) is located on the far side of the internal thread of the knob (2).

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