CN114795352A - Tubular anastomat - Google Patents

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to the field of surgical instruments. The tubular anastomat provided by the invention comprises a stop piece, and the actuating rod is provided with a stop structure. The stop is connected to the housing and selectively engageable with the stop structure, and when the stop and the stop structure are engaged, the actuating rod is in the set position, and the staple cartridge and the anvil are in a minimally open state. Therefore, through the matching of the stop piece and the stop structure, the actuating rod can stay at a set position, and the nail bin and the nail anvil can stay at the lowest opening state. The operator does not need to record the number of rotation turns of the knob, and can conveniently ensure that the nail bin and the nail anvil can be stably positioned in a good minimum opening state, thereby reducing the operation time, reducing the operation difficulty and improving the operation success rate.

Description

A tubular stapler

technical field

The invention belongs to the technical field of medical instruments, and particularly relates to the field of surgical instruments.

Background technique

The tubular stapler includes a tubular housing, a knob, an actuation rod, a staple anvil, and a staple cartridge. The knob is rotatably secured at the proximal end of the tubular housing, and the staple anvil and the staple cartridge are located at the distal end of the tubular housing. The actuating rod is passed through the tubular housing, and the proximal end of the actuating rod is screwed with the knob. According to the principle of the screw nut, the rotation of the knob can be converted into the axial direction of the actuating rod between the first position and the second position. move. The distal end of the actuating rod is connected to the staple anvil in a manner capable of changing the distance between the staple cartridge and the staple anvil, so that when the actuating rod is in the first position, the staple cartridge and the staple anvil are in an open state, and the actuating rod In the second position, the staple cartridge and the staple anvil are in a closed state to clamp the tissue layer. In general, after the tissue layer is clamped and suturing is complete, it is necessary to turn the knob a preset number of turns to cause the actuating rod to move from the second position to a position between the first and second positions where, The distance between the staple cartridge and the staple anvil is greater than the distance between the two in the closed state and less than the distance between the two in the open state, which is called 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 can enable the intestinal tissue connected to the human body to be freely separated from the contact surface of the staple cartridge and the staple anvil (basically equivalent to The pitch corresponding to the half-turn to three-quarter turn of the knob is about 2mm). The distance between the staple cartridge and the staple anvil should not be too large, otherwise the outer wall of the intestines will sag when the tubular stapler is pulled out, which will pull the intestines. Therefore, it is a common pursuit in the art to ensure that the staple cartridge and the staple anvil are in the minimum open state when the tubular stapler is pulled out. However, in actual use, the operator often forgets how many turns to turn, resulting in the opening of the staple cartridge and the staple anvil too large or too small.

SUMMARY OF THE INVENTION

(1) Technical problems to be solved

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 and causes the staple cartridge and the staple anvil to open too large or too small.

(2) Technical solutions

In order to achieve the above-mentioned purpose, the main technical scheme adopted in the present invention includes:

The invention provides a tubular stapler, comprising a tubular housing, a knob, an actuating rod, a nail anvil and a staple cartridge, the knob is rotatably fixed at the proximal end of the tubular housing, and the actuating rod is penetrated through the tubular housing , the proximal end of the actuating rod is screwed with the knob, and the distal end of the actuating rod is connected with the anvil in a way that can change the distance between the anvil seat and the nail cartridge, and the rotation of the knob can be converted into the actuating rod in the first moving between the position and the second position, when the actuating rod is in the first position, the staple cartridge and the staple anvil are in an open state, and when the actuating rod is in the second position, the staple cartridge and the staple anvil are in a closed state; further comprising a stopper The actuating rod is also provided with a stopper structure; the stopper is connected to the housing and can be selectively engaged with the stopper structure. When the stopper and the stopper structure are engaged, the actuating rod is in a set position, and the nail The cartridge and the nail anvil are in the minimum open state.

According to the present invention, the side wall of the tubular casing is provided with a through slot, the stopper is an insert piece that can move along the slot between the stop position and the relinquish position, and the insert piece has a channel; the stopper structure is: A structure protruding radially from the actuating rod; when the insert piece is at the stop position, the actuating rod passes through the channel, the stop structure can abut on the insert piece, and the outer end of the insert piece protrudes from the tubular casing.

According to the present invention, a slot is provided on the side wall of the tubular casing, the channel is in the shape of a U open at the inner end of the stopper piece, and the insert piece is pulled out from the slot to form the insert piece in the vacated position, or, When the blade is in the relinquished 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 casing, and the blade is inserted in the two In the slot, the channel is racetrack-shaped, oval or circular, the stopper structure can pass through the channel when the insert piece is in the vacated position, and the channel is eccentric to the actuating rod when the insert piece is at the stop position.

According to the present invention, the outer end of the insert has a limit step.

According to the present invention, the stopper is an arc-shaped snap buckle, which is elastically connected to the tubular casing and extends into the interior of the tubular casing; the proximal end of the actuating rod includes a small-diameter section and a large-diameter section arranged from near to far. The proximal end of the small diameter section is screwed with the knob, and an annular stepped surface is formed at the connection of the small diameter section and the large diameter section.

According to the present invention, it also includes a stopper driver that can move between the open position and the closed position; the stopper driver is connected with the stopper to drive the stopper to move between the stop position and the let-away position; When the stopper driver is at the open position, the stopper is at the stopper position; when the stopper drive member is at the closed position, the stopper is at the abdicated position.

According to the present invention, the stopper driving member is a button, and the button is hingedly connected to the tubular casing; the first end of the button is hinged with the outer end of the stopper; the side wall of the tubular casing is provided with a through groove, and the stopper is inserted It is arranged in the through groove and can move up and down along the penetrating direction of the through groove.

According to the present invention, the stop structure is a protrusion or annular protrusion protruding from the outer wall of the actuating rod, or a plunger or a tab inserted on the actuating rod.

According to the invention, the stopper is connected to the tubular housing variably along its axial position.

According to the present invention, the proximal end of the actuating rod is provided with a first thread segment and a second thread segment, the first thread segment is located at the proximal side of the second thread segment and the pitch of the first thread segment is smaller than that of the second thread segment; the knob is connected There is a nut, the pitch of the inner thread of the nut is greater than the pitch of the inner thread of the knob, and the inner thread of the nut is located on the far side of the inner thread of the knob.

(3) Beneficial effects

The beneficial effects of the present invention are:

In the tubular stapler of the present invention, through the cooperation of the stopper and the stopper structure, the actuating rod can stay in the set position, and the staple cartridge and the staple anvil can stay in the minimum open state. The operator does not need to record the number of rotations of the knob, which can conveniently ensure that the nail cartridge and the nail anvil 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.

Description of drawings

1 is a schematic perspective view of the tubular stapler provided in Embodiment 1;

FIG. 2 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler in FIG. 1 , when the stopper is at the stop position;

FIG. 3 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler in FIG. 1 , with the stopper in a receding position;

FIG. 4 is a schematic cross-sectional view of the proximal end of the tubular stapler in FIG. 1 , when the stopper is at the stop position;

5 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in the second embodiment, and the stopper is at the stop position at this time;

FIG. 6 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in the second embodiment, and the stopper is at the abdicated position at this time;

7 is a schematic cross-sectional view of the proximal end of the tubular stapler provided in the second embodiment, and the stopper is at the stop position at this time;

8 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in the third embodiment, and the stopper is at the stop position at this time;

FIG. 9 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in the third embodiment, and the stopper is at the abdicated position at this time;

10 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in the fourth embodiment, and the stopper is at the stop position at this time;

FIG. 11 is a schematic longitudinal cross-sectional view of the proximal end of the tubular stapler provided in the fifth embodiment, and the stopper is at the abdicated position at this time;

Figures 2 to 11 above are only schematic diagrams, and the details are simplified, for example, the threads on the actuating rod, the nut and the knob are not drawn.

[Description of reference numerals]

1: Tubular shell;

2: knob;

3: Actuating lever;

4: Nail anvil;

5: Nail warehouse;

6: slot;

7: channel;

8: Insert;

9: stop structure;

10: limit step;

11: Nut;

12: Arc buckle;

13: Small diameter section;

14: Large diameter section;

15: key;

16: through slot;

17: Stopper.

Detailed ways

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 that is close to the operator during use is referred to as "near", and the end farther away from the operator is referred to as "far".

Example 1

Referring to FIG. 1 to FIG. 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 , and of course, also includes other common existing structures of tubular staplers, which have nothing to do with the invention of the present invention. structure is not repeated here.

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

The staple anvil 4 and the staple cartridge 5 are located at the distal end of the tubular housing 1 . The staple anvil 4 and the staple cartridge 5 are used to sandwich the tissue therebetween and close for further staple push stapling and severing. In this embodiment, the arrangement direction of the staple anvil 4 and the staple cartridge 5 is consistent with the axial direction of the tubular housing 1 , and the staple anvil 4 is located at the far side of the staple cartridge 5 .

The actuating rod 3 is inserted through the tubular housing 1, the proximal end of the actuating rod 3 is threaded, and the knob 2 is provided with a threaded hole, and then the actuating rod 3 is screwed with the knob 2. According to the principle of the screw and nut, the knob A rotation of 2 about its axis can be translated into a movement of the actuating rod 3 in its axial direction between the first position and the second position. In this embodiment, the first position is located on the far side of 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 The moving rod 3 moves from the second position to the first position. The distal end of the actuating rod 3 is connected to the nail anvil 4 directly or through other structures in the prior art, such as a shaft, so as to be able to change the distance between the staple cartridge 5 and the nail anvil 4 . In this way, when the actuating rod 3 is in the first position, the staple cartridge 5 and the staple anvil 4 are in an open state, and when the actuating rod 3 is in the second position, the staple cartridge 5 and the staple anvil 4 are in a closed state to clamp the tissue Layer, in other words, the movement of the actuating rod 3 from the first position to the second position drives the anvil 4 towards the staple cartridge 5, while the movement of the actuating rod 3 from the second position to the first position drives the nail anvil 4 Move away from the staple cartridge 5.

Referring to FIG. 2 , in this embodiment, the tubular stapler further includes a stopper, the actuating rod 3 is further provided with a stopper structure 9 , and the stopper is connected to the tubular housing 1 and optionally connected to the stopper structure 9 Engage. When the stopper and the stopper structure 9 are engaged (refer to FIG. 2 ), the actuating rod 3 is in a set position (which 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, the "minimum open state" is the distance between the staple cartridge and the staple anvil so that the intestinal tissue connected to the human body can be removed from the staple cartridge and the staple anvil The contact surface is free to leave (basically equivalent to the pitch corresponding to the half-turn to three-quarter turn of the knob, roughly 2mm); at the same time, the distance between the staple cartridge and the staple anvil is not too large, otherwise when the tubular stapler is pulled out The outer wall of the intestines can sag and pull on the intestines. When the stopper needs to be de-selected to engage with the stopper structure 9, the stopper moves to a receding position (refer to FIG. 3), and the axial movement of the actuating rod 3 is not stopped by the stopper. Through the cooperation of the stopper and the stopper 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 located in a position not in engagement with the stopper structure 9. before turning the knob 2 in the second direction to cause the actuating rod 3 to move from the second position to the first position, the selection stop is in a position where it can come into engagement with the stop structure 9, ie the stop position, and then turn the knob 2 in the second direction, the actuating rod 3 moves from the second position toward the first position and when the stop structure 9 is engaged with the stop piece, the actuating rod 3 is prevented from continuing to move, forming a feeling of being in place, This enables the operator to know that the staple cartridge 5 and the staple anvil 4 are in the minimum open state, and can maintain this state and separate the tubular stapler from the human body.

In this way, the operator does not need to record the number of rotations of the knob 2, and can conveniently ensure that the staple cartridge 5 and the staple 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 of the operation. Rate.

Further referring to FIGS. 2 to 4 , in this embodiment, a slot 6 is provided on the side wall of the tubular casing 1 penetrating the side wall. The stopper is an insert piece 8 that can move along the slot 6 between a stop position (refer to FIG. 2 ) and an escape position (refer to FIG. 3 ), and the insert piece 8 forms a sliding fit with the slot 6 . Wherein, when the inserting piece 8 is at the stop position, the outer end of the inserting piece 8 protrudes from the tubular casing 1, so that the operator can pull the inserting piece 8 outwards to move it to the vacant position. The abdication position can be implemented so that the insert piece 8 is completely pulled out from the slot 6, or it can be implemented so that the insert piece 8 does not break away from the tubular housing 1 when it is in the abdicated position (at this time, the abdicated position is located on the outside of the stop position), The latter is taken as an example in this embodiment.

Specifically, the insert 8 has a channel 7 which is U-shaped open at the inner end of the insert 8 (the end located inside the tubular housing 1 when inserted), in other words, the insert 8 forms an integral U shape, and U The open end of the shape is inserted into the slot 6, it being understood that this open opening is intended for insertion on the outside of the actuating rod 3, ie for the actuating rod 3 to pass through. Correspondingly, the stop structure 9 is a structure protruding radially from the actuating rod 3 , and in this embodiment, is formed by two protrusions at an angle of 180°. However, the present invention is not limited to this, the stopper structure 9 may be a rod inserted on the actuating rod 3 protruding from both ends, or may be at least three protrusions surrounding the stopper structure 9, or may be an annular protrusion In this way, regardless of the orientation in which the actuating rod 3 is mounted, it can come into abutment with the insert 8 . Of course, without considering the installation convenience of the actuating rod 3 , the stopper structure 9 can be a protrusion radially protruding from the actuating rod 3 , which can also complete the cooperation with the insert piece 8 .

In addition, the outer end of the insert piece 8 has a limit step 10 , and when the limit step 10 abuts against the outer wall of the tubular housing 1 , the insert piece 8 is located at a stop position. In this way, the inserting piece 8 is prevented from being inserted too deep or not inserted deep enough.

Referring to FIG. 3 , when the insert piece 8 is in the abdicated position, the stop structure 9 can pass through the channel 7 with the actuating rod 3 , without hindering the actuating rod 3 from moving from the first position to the second position, nor hindering the actuating rod 3 Move from the second position to the first position.

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 abuts on the insert 8 .

The procedure for extracting the tubular stapler from the human body is described as follows:

S1, the drive insert 8 moves from the abdication position to the stop position;

S2. The driving knob 2 rotates in the second direction, the actuating rod 3 moves from the second position to the first position, until the stopper structure 9 abuts against the insert 8, the actuating rod 3 stays at the set position, and the nail anvil 4 And the nail cartridge 5 is in the minimum open state, the operator feels a sense of place, and stops rotating the knob 2;

S3. Pull out the tubular stapler from the human body, and then drive the insert 8 to move from the stop position to the abdication position;

S4. Continue to rotate the knob 2 in the second direction, and the actuating rod 3 continues to move from the second position to the first position until reaching the first position, and the tissue is released.

In this way, the design of the tubular stapler of this embodiment can continue to drive the staple anvil 4 and the staple cartridge 5 to open after the tubular stapler is pulled out from the human body, which is convenient for releasing the tissue.

In addition, in this embodiment, the proximal end of the actuating rod 3 can be provided with two first thread segments and second thread segments with different thread pitches, the first thread segment is located at the proximal side of the second thread segment, and the first thread segment is located at the proximal side of the first thread segment. The pitch is smaller than the pitch of the second thread segment. The knob 2 is connected with a nut 11 , the pitch of the inner thread of the nut 11 is larger than the pitch of the inner thread of the knob 2 , and the inner thread of the nut 11 is located on the far side of the inner thread of the knob 2 . In this way, the movement of the actuating rod 3 from the first position to the second position is first fast and then slow.

Embodiment 2

Referring to FIG. 5 to FIG. 7 , the difference between this embodiment and the first embodiment lies in the structure of the insert piece 8 and the arrangement of the slot 6 .

Specifically, in this embodiment, two radially symmetrical slots 6 are provided on the side wall of the tubular housing 1, and two ends of the insert 8 are respectively inserted into the two slots 6 and form a sliding connection . The channel 7 in the insert 8 is a closed through hole, which is different from the shape with an open port in the first embodiment. The actuating rod 3 passes through the channel 7 regardless of whether the tab 8 is in the free position or in the stop position. When the insert piece 8 is at the stop position, the channel 7 is arranged eccentrically to the actuating rod 3 ; when the insert piece 8 is at the receding position, the channel 7 coincides or substantially coincides with the center of the actuating rod 3 . In this embodiment, the channel 7 is in the shape of a racetrack, but the present invention is not limited to this, and may also be in an oval or circular shape.

Referring to FIG. 6 , when the insert 8 is in the abdicated 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 with the movement of the actuating rod 3 .

Referring to FIG. 5 , when the insert 8 is 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 one side of the insert area of the channel 7 .

Preferably, both ends of the insert piece 8 protrude from the tubular casing 1 when the insert piece 8 is located at the abdication position and the stop position, and there are limit steps 10 at both ends of the insert piece 8 , and the limit steps 10 at both ends are in the insert piece 8 . The sheet 8 abuts against the outer wall of the tubular housing 1 when it is in the free position and the stop position, respectively. In this way, based on the in-position feeling of the operator to switch the position of the insert piece 8 , the position switching failure due to inaccurate movement of the insert piece 8 is prevented.

The procedure for extracting the tubular stapler from the human body is described as follows:

S1, the drive insert 8 moves from the abdication position to the stop position;

S2. The driving knob 2 rotates in the second direction, the actuating rod 3 moves from the second position to the first position, until the stopper structure 9 abuts against the insert 8, the actuating rod 3 stays at the set position, and the nail anvil 4 And the nail cartridge 5 is in the minimum open state, the operator feels a sense of place, and stops rotating the knob 2;

S3. Pull out the tubular stapler from the human body, and then drive the insert 8 to move from the stop position to the abdication position;

S4. Continue to rotate the knob 2 in the second direction, and the actuating rod 3 continues to move from the second position to the first position until reaching the first position, and the tissue is released.

Embodiment 3

Referring to FIG. 8 and FIG. 9 , the difference between this embodiment and the first and second embodiments lies in the stopper and the stopper structure 9 .

In this embodiment, the stopper is an arc-shaped elastic buckle 12 , and the arc-shaped elastic buckle 12 is elastically connected to the tubular casing 1 and protrudes toward the interior of the tubular casing 1 . The inner surface of the arc snap 12 is an arc surface, so that the contact with the actuating rod 3 does not hinder the movement of the actuating rod 3 .

Correspondingly, the proximal end of the actuating rod 3 includes a small diameter section 13 and a large diameter section 14 arranged from near to far. The proximal end of the small diameter section 13 is provided with threads to be screwed with the knob 2 and the nut 11 . The annular stepped surface formed at the junction of the small diameter section 13 and the large diameter section 14 constitutes the stop structure 9, and at the same time the annular stepped surface is inclined towards the distal side, so that the staple can be further driven after the tubular stapler is pulled out The anvil 4 and the staple cartridge 5 are opened.

Referring to FIG. 9 , when the actuating rod 3 is in the first position, the arc snap 12 is in contact with the outer peripheral surface of the large diameter section 14 , the arc snap 12 is in a compressed state, and at this time the arc snap 12 is in place Location.

8 and 9 , during the movement of the actuating rod 3 from the first position to the second position (ie, the movement from FIG. 9 to FIG. 8 ), when the above-mentioned annular step surface of the actuating rod 3 moves through the The arc buckle 12, the small diameter section 13 corresponds to the arc buckle 12, the energy storage of the arc buckle 12 is released, and the arc buckle 12 moves toward the actuating rod 3 until the energy storage of the arc buckle 12 is released. Or press against the small diameter section 13, at this time, the arc snap 12 is at the stop position.

When the actuating lever 3 is in the second position, the arc snap 12 corresponds to the small diameter segment 13, may or may not contact the small diameter segment 13, and the arc snap 12 is in the stop position.

During the movement of the actuating rod 3 from the second position to the first position, when the above-mentioned annular stepped surface of the actuating rod 3 moves to the arc-shaped spring buckle 12, it is blocked (refer to FIG. 8 ), and the arc-shaped spring buckle 12 is blocked. Engaged with the annular stepped surface, the actuating rod 3 is located at the set position, the operator feels a sense of place, and the operator knows that the staple cartridge 5 and the staple anvil 4 are in the minimum open state, and the tubular stapler can be separated from the human body.

After the tubular stapler is pulled out from the human body, continue to rotate the knob 2 with a relatively large force, the actuating rod 3 continues to move from the set position to the first position, and the annular stepped surface squeezes the arc while moving with the actuating rod 3 The elastic buckle 12 is compressed and retracted until the final arc-shaped elastic buckle 12 is pressed against the large diameter section 14, and the arc-shaped elastic buckle 12 returns to the vacated position.

Embodiment 4

10 and FIG. 11 , in this embodiment, the tubular stapler further includes a stopper driving member, which is connected with the stopper to drive the stopper to move between the stop position and the abdication position. In this embodiment, the stopper driver can move between the open position and the closed position. When the stopper driver is in the open position, the stopper is in the stopper position, and when the stopper driver is in the closed position, the stopper in a give way. The movement of the stop driver between the open position and the closed position may be rotational, radial movement of the tubular stapler, or axial movement of the tubular stapler.

In this embodiment, the stopper driver is a button 15, the button 15 is located outside the tubular casing 1, the middle of the button 15 is hingedly connected to the tubular casing 1, and the first end of the button 15 is connected to the stopper (this In the embodiment, the outer end of the stopper piece 17) is hinged, and the second end of the button 15 is the free end. The side wall of the tubular housing 1 is provided with a through groove 16 , and the stopper is inserted into the through groove 16 and moves up and down along the through direction of the through groove 16 . When the first end of the key 15 is pressed, the first end of the key 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 key 15 is pressed, the first end of the key 15 is moved outward to the closed position, and the stopper is retracted toward the through slot 16 to the abdicated position.

The stopper in this embodiment may also be a stopper rod.

The procedure for extracting the tubular stapler from the human body is described as follows:

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 abdication position to the stop position;

S2. The driving knob 2 rotates in the second direction, the actuating rod 3 moves from the second position to the first position, until the stopper structure 9 abuts the stopper, the actuating rod 3 stays at the set position, and the anvil seat 4 And the nail cartridge 5 is in the minimum open state, the operator feels a sense of place, and stops rotating the knob 2;

S3, pulling out the tubular stapler from the human body, and then pressing the second end of the button 15, 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 vacated position;

S4. Continue to rotate the knob 2 in the second direction, and the actuating rod 3 continues to move from the second position to the first position until reaching the first position, and the tissue is released.

In the above Embodiments 1 to 4, the stopper structure 9 is used as an example as a protrusion, but the present invention is not limited to this. A ring-shaped projection, a plug or a plug inserted on the actuating rod 3 .

In addition, on the basis of Embodiment 1 to Embodiment 4, a circuit can be added to the actuating rod 3, and a circuit can also be added to the stopper at the same time. When the stopper and the stopper structure are engaged, the two circuits are connected. A light on the circuit lights up or a generator on the circuit makes a sound.

In addition, on the basis of the first embodiment to the fourth embodiment, the stopper is connected to the tubular housing 1 variably along the axial position of the tubular housing 1, so that the setting position of the stopper can be changed according to the actual situation, Further, the distance between the staple cartridge 5 and the staple anvil 4 in the clamping state is changed to adapt to more situations. Further, a position mark is set on the side tubular casing 1 of the stopper, and the position mark is associated with the distance between the staple cartridge 5 and the nail anvil 4 in the clamped state, so that the operator can choose a suitable stopper piece location. For example, in the first embodiment, a plurality of spaced slots 6 are arranged on the tubular casing 1 along its axial direction, so that the inserts 8 can be selectively inserted into any one of the slots 6; for example, the first embodiment and the second embodiment , the axial dimension of the slot 6 is greater than the thickness of the insert piece 8, and the insert piece 8 can be fine-tuned axially; The axial chute on 1 slides; for example, in the fourth embodiment, the stopper driver and the stopper as a whole can slide along the axial chute on the tubular housing 1 .

To sum up, the present invention can be applied not only to the intestinal tract, but also to the appetite and esophagus. Although the appetite and esophagus do not have the problem of depression like the intestinal tract, it is still necessary to determine a minimum open state suitable for extraction. .

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to alterations, modifications, substitutions and variations.

Claims (10)

1. A tubular anastomat comprises a tubular shell (1), a knob (2), an actuating rod (3), a nail anvil block (4) and a nail bin (5), the knob (2) is rotatably fixed at the proximal end of the tubular housing (1), the actuating rod (3) is arranged in the tubular shell (1) in a penetrating way, the proximal end of the actuating rod (3) is screwed with the knob (2), the distal end of the actuating rod (3) is connected to the anvil in such a way that the distance between the staple anvil (4) and the staple cartridge (5) can be varied, the rotation of the knob (2) can be translated into a movement of the actuating rod (3) between a first position and a second position, the actuating rod (3) being in the first position with the staple cartridge (5) and the staple anvil (4) in an open condition, the actuating lever (3) is in the second position with the staple cartridge (5) and the staple anvil (4) in a closed state; the device is characterized by further comprising a stop piece, wherein a stop structure (9) is further arranged on the actuating rod (3);

the stop is connected to the housing and selectively engageable with the stop structure (9), and when the stop and stop structure (9) are engaged, the actuating rod (3) is in a set position with the staple cartridge (5) and staple anvil (4) in a minimally deployed state.

2. The tube-type anastomat of claim 1,

a penetrating slot (6) is formed in the side wall of the tubular shell (1), the stop piece is an insertion piece (8) capable of moving between a stop position and a yielding position along the slot (6), and the insertion piece (8) is provided with a channel;

the stop formation (9) is a formation that projects radially from the actuating lever (3);

when the inserting sheet (8) is in the stopping position, the actuating rod (3) penetrates through the channel (7), the stopping structure (9) can abut against the inserting sheet (8), and the outer end of the inserting sheet (8) protrudes out of the tubular shell (1).

3. The tube-type anastomat of claim 2,

the side wall of the tubular shell (1) is provided with one slot (6), the channel (7) is in a U shape with the inner end of the stopping piece opened, the inserting piece (8) is pulled out from the slot (6) to form that the inserting piece (8) is positioned at an abdicating position, or when the inserting piece (8) is positioned at the abdicating position, the inserting piece (8) is kept inserted in the slot (6), and meanwhile, the stopping structure (9) can penetrate through the channel (7); or

Be equipped with two radial symmetries on the lateral wall of tubular shell (1) slot (6), inserted sheet (8) are inserted and are established two in slot (6), passageway (7) are runway shape, oval or circular, inserted sheet (8) are located during the position of stepping down, backstop structure (9) can pass passageway (7), inserted sheet (8) are located during the backstop position, passageway (7) eccentric in actuating lever (3).

4. The tube-type anastomat of claim 2,

the outer end of the inserting piece (8) is provided with a limiting step (10).

5. The tube-type anastomat of claim 1,

the stop piece is an arc-shaped elastic buckle (12), and the arc-shaped elastic buckle (12) is elastically connected to the tubular shell (1) and extends into the tubular shell (1);

the proximal end of the actuating rod (3) comprises a small-diameter section (13) and a large-diameter section (14) which are arranged from far to near, the proximal end of the small-diameter section (13) is screwed with the knob (2), an annular step surface is formed at the joint of the small-diameter section (13) and the large-diameter section (14), the annular step surface forms the stopping structure (9), and the annular step surface is inclined towards far side.

6. The tube-type stapler of claim 1, further comprising a stop drive movable between an open position and a closed position;

the stop driving piece is connected with the stop piece so as to drive the stop piece to move between the stop position and the abdicating position;

when the stopping driving piece is positioned at the opening position, the stopping piece is positioned at the stopping position;

when the stopping driving piece is located at the closing position, the stopping piece is located at the yielding position.

7. The tube-type anastomat of claim 6,

the stop driving piece is a key (15), and the key (15) is hinged to the tubular shell (1);

the first end of the key (15) is hinged with the outer end of the stop piece;

the side wall of the tubular shell (1) is provided with a through groove (16), and the stop piece is inserted into the through groove (16) and can move up and down along the through direction of the through groove (16).

8. The tube-type anastomat of any one of claims 1 to 4, 6 and 7,

the stop structure (9) is a projection or an annular bulge which is protruded from the outer wall of the actuating rod (3), or an inserting rod or an inserting sheet which is inserted on the actuating rod (3).

9. The tube-type anastomat of claim 1,

the stop element is connected to the tubular housing (1) in a variable manner in terms of its axial position along the tubular housing (1).

10. The tube-type anastomat of claim 1,

the proximal end of the actuating lever (3) is provided with a first thread section and a second thread section, the first thread section is located proximal to the second thread section and the thread pitch of the first thread section is smaller than the thread pitch of the second thread section;

the knob (2) is connected with 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 distal to the internal thread of the knob (2).

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