Continuous hemostatic clip conveying device for digestive endoscopy

Abstract

The continuous hemostatic clip conveying device comprises a conveying pipe, a plurality of hemostatic clips connected front and back are arranged in the conveying pipe, the outer surfaces of the hemostatic clips are in sliding contact fit with the inner wall of the conveying pipe, a rotating pipe is arranged at the end of the conveying pipe, and the inner diameter of the rotating pipe is equal to that of the conveying pipe; the hemostatic clip bodies penetrate through the rotating pipe to be released, the ends of the two pulling pieces of the last hemostatic clip are connected with a clip head, the clip head comprises two connecting arms, the two connecting arms are connected with the two pulling pieces respectively and can pull the pulling pieces to move, and the rear end of the clip head is connected with an inhaul cable. A plurality of hemostatic clips can be continuously conveyed and released through one-time implantation operation, so that repeated surgical operations are reduced, the surgical time is shortened, and the surgical risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a continuous hemostatic clip delivery device for digestive endoscopy. Background Technology

[0002] Hemostatic clips, as an important medical tool, play a crucial role in gastrointestinal endoscopic surgery. Through the precise application of hemostatic clips, surgeons can effectively perform hemostasis and wound closure, thereby ensuring the smooth progress of the surgery. Using hemostatic clips to close and stop bleeding is considered the most effective and clinically valuable non-surgical treatment for gastrointestinal bleeding due to its minimal invasiveness, rapid hemostasis, low rebleeding rate, few complications, and definite efficacy.

[0003] With the continuous development of medical technology, the complexity of endoscopic surgery is gradually increasing. During surgery, large wounds require the use of multiple hemostatic clips to close and stop bleeding. Traditional hemostatic clip delivery devices can only release one clip at a time. To insert another clip, the previously used delivery device must be withdrawn, and the insertion process must be repeated. When multiple clips need to be inserted, this results in a large number of repetitive operations, significantly prolonging the operation time and increasing surgical risks. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous hemostatic clip delivery device for digestive endoscopy, which can continuously deliver and release multiple hemostatic clips in a single insertion operation, reducing repetitive surgical procedures, shortening surgical time, and lowering surgical risks.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a continuous hemostatic clip delivery device for digestive endoscopy, comprising a delivery tube, wherein a plurality of hemostatic clips are provided inside the delivery tube and connected in a front-to-back manner, the outer surface of the hemostatic clips slidingly contacting and engaging with the inner wall of the delivery tube.

[0006] The hemostatic clamp comprises a cylindrical hemostatic clamp body, two clamp arms are fixed at the front end of the hemostatic clamp body through a pin shaft, two clamp holding grooves capable of accommodating rear hemostatic clamp arms are arranged at the rear end of the hemostatic clamp body, a pull arm is arranged at the side of the root of each of the two clamp arms, a pull piece is connected to the end of the pull arm through a pin shaft, the pull piece is pulled to drive the clamp arm to rotate so as to be opened or closed, the pull piece extends backward through the hemostatic clamp body and extends into the clamp holding groove, the front end of the pull piece is bent to form a bent section outward of the clamp holding groove, an insertion groove is arranged at the inner side of the rear hemostatic clamp arm, the bent section can be inserted into the insertion groove when the clamp arm is inserted into the clamp holding groove, the bent section can be separated from the insertion groove when the clamp arm is opened, a spacing part is arranged between the two clamp holding grooves of the hemostatic clamp body, and the two pull pieces extend into the clamp holding groove along the two side surfaces of the spacing part.

[0007] The end of the conveying pipe is provided with a rotating pipe, the inner diameter of the rotating pipe is equal to the inner diameter of the conveying pipe, the hemostatic clamp body passes through the rotating pipe to be released, the transition surface between the openings of the two clamp holding grooves on the surface of the hemostatic clamp body is provided with a flat part I, the two flat parts I are provided with clamping grooves perpendicular to the moving direction of the hemostatic clamp, the inner wall of the rotating pipe is matched with the outer surface of the hemostatic clamp body in shape and is in sliding fit, the inner wall of the rotating pipe is provided with a flat part II matched in shape at the position corresponding to the two flat parts I of the hemostatic clamp body, the inner wall of the flat part II is provided with a clamping piece, the end of the clamping piece is directed toward the outlet of the rotating pipe, the end of the clamping piece is bent toward the hemostatic clamp body and can be clamped into the clamping groove to prevent the hemostatic clamp body from retreating and easily sliding forward.

[0008] The ends of the two pull pieces of the last hemostatic clamp are connected with a clamp head, the clamp head comprises two connecting arms, the two connecting arms are connected with the two pull pieces and can pull the pull pieces to move, and the rear end of the clamp head is connected with a pulling rope.

[0009] Further, the pull piece is in the shape of a long strip, the width of the bent section is smaller than the width of other parts, the bottom of the clamp holding groove is provided with an open sliding groove, the opening width of the sliding groove is smaller than the width of the sliding groove, the pull piece is arranged in the sliding groove and can slide along the sliding groove, the width of the pull piece is greater than the width of the opening of the sliding groove, and the width of the bent section is smaller than the width of the opening of the sliding groove and extends out of the opening of the sliding groove. By adopting the scheme, one end of the pull piece pulled can be always attached to the bottom of the clamp holding groove, the pull piece can not be pulled up and separated from the insertion groove when the clamp arm is opened, and the stability of the pull piece end bent section separated from the clamp arm when the clamp arm is opened is improved.

[0010] Further, the card slot is provided with a rearwardly inclined guide surface on one side surface at the rear, and when the hemostatic clip moves forward, the end of the card slides off the bottom of the card slot and is pushed up along the guide surface. After the adoption of the scheme, when the hemostatic clip body is pushed forward, the hemostatic clip can be pushed out with smaller force, and when the pull rope pulls the pull tab backward to close the clip arms, the hemostatic clip body is prevented from retreating by the cooperation of the card and the card slot, facilitating the pull rope to pull the pull tab to clamp the two clip arms to close the wound tissue.

[0011] Further, the card slot is provided with a rearwardly inclined guide surface on one side surface at the rear, and when the hemostatic clip moves forward, the end of the card slides off the bottom of the card slot and is pushed up along the guide surface. After the adoption of the scheme, when the hemostatic clip body is pushed forward, the hemostatic clip can be pushed out with smaller force, and when the pull rope pulls the pull tab backward to close the clip arms, the hemostatic clip body is prevented from retreating by the cooperation of the card and the card slot, facilitating the pull rope to pull the pull tab to clamp the two clip arms to close the wound tissue.

[0012] Further, the front end edge of the front end flat portion I of the hemostatic clip body is provided with a rearwardly inclined inclined surface. The inclined surface provided at the front end of the flat portion I can prevent the front end edge of the hemostatic clip body from being stuck by the end of the card, reduce the resistance when the hemostatic clip body moves forward, and at the same time, play a certain guiding role when the hemostatic clip body enters the rotating tube, so that the hemostatic clip body smoothly enters the rotating tube.

[0013] The locking piece is elastic and inclined toward the inside of the hemostatic clip, and the locking teeth are a plurality of locking teeth, the locking teeth clamping the rotating belt drive the locking piece to rotate, the front end of the locking piece slides over the top of the locking teeth, and is pressed into between the two locking teeth, and the outer side surface of the locking teeth blocks the locking piece from rotating back.

[0014] The inner wall of the flat portion II is provided with a recess at the position of the card to accommodate the card pushed up.

[0015] The outermost end of the outer side surface of the clip arm in the clamping groove in the clamped state is flush with the outer contour line of the cylindrical body of the hemostatic clip body. When the pull tab is pushed forward, the clip arm has a tendency to open, and the adoption of the scheme can constrain the clip arm from opening by using the inner wall of the delivery tube to prevent the bent section of the pull tab from coming out of the insertion slot of the clip arm.

[0016] The end of the delivery tube is provided with a tubular connector, the inner wall of the connector is provided with two annular connecting grooves, the outer wall of the rotating tube is provided with two protruding rings matched with the connecting grooves, and the two protruding rings are respectively clamped into the two connecting grooves and slide in contact. After the adoption of the scheme, the rotating tube can rotate in the connector, and the hemostatic clip and the rotating tube can rotate together, facilitating the operating room to adjust the angle of clamping the wound.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can set multiple hemostatic clips in the delivery tube. After the first hemostatic clip is used, the pull cable pushes the subsequent hemostatic clips forward, pushing the first hemostatic clip out of the rotating tube. The clamping arms of the adjacent hemostatic clips open under the push of the pull tabs, and the bent section of the pull tab of the first hemostatic clip disengages from the slot, completing the release of the first hemostatic clip. At this time, the second hemostatic clip is temporarily positioned in the rotating tube by the slot and the card. Pulling the pull cable drives the pull tab of the second hemostatic clip to pull backward, and the clamping arm rotates to perform the clamping operation. After the clamping arm reaches the locked position, the second hemostatic clip is pushed forward by the pull cable to a certain force, and the card disengages from the slot and is pushed outward. The second hemostatic clip moves forward to complete the release. The present invention realizes the continuous release of multiple hemostatic clips. Multiple hemostatic clips can be released with one insertion, which greatly improves the efficiency of the operation, reduces the operation time, and reduces the risk of the operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the hemostatic clamp of the present invention inside the delivery tube;

[0019] Figure 2 This is a schematic diagram of the connection structure of the front and rear hemostatic clips of the present invention;

[0020] Figure 3 This is a schematic diagram of the hemostatic clip and rotating tube of the present invention.

[0021] Figure 4 This is a cross-sectional schematic diagram of the hemostatic clip and rotating tube mating structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the mating structure of the pull tab and the sliding groove of the present invention;

[0023] Figure 6 This is a schematic diagram of the locking plate and locking tooth mating structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the card slot and card mating structure of the present invention;

[0025] Figure 8 This is a schematic diagram of the groove and card mating structure of the last hemostatic clip of the present invention.

[0026] In the diagram: 1. Delivery tube; 2. Hemostatic clamp; 3. Hemostatic clamp body; 4. Clamping arm; 5. Clamping groove; 6. Pull arm; 7. Pull tab; 8. Bending section; 9. Slot; 10. Spacing part; 11. Slide groove; 12. Locking tab; 13. Locking tooth; 14. Rotating tube; 15. Connector; 16. Connecting groove; 17. Protruding ring; 18. Flat part I; 19. Slot; 20. Flat part II; 21. Card; 22. Recess; 23. Guide surface; 24. Clamp; 25. Pull cable. Detailed Implementation

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0028] Please refer to Figures 1-8 The embodiment provides a continuous hemostatic clip conveying device for a digestive endoscope, which comprises a conveying pipe 1, a plurality of hemostatic clips 2 connected in front and back inside the conveying pipe 1, and a sliding contact between the outer surface of the hemostatic clip 2 and the inner wall of the conveying pipe 1.

[0029] The hemostatic clip 2 comprises a cylindrical hemostatic clip body 3, two clip arms 4 fixed at the front end of the hemostatic clip body 3 through a pin shaft, two clamping grooves 5 capable of accommodating the clip arms of the hemostatic clip in the back end of the hemostatic clip body 3, a pull arm 6 arranged on one side of the root of each of the two clip arms 4, a pull piece 7 connected to the end of the pull arm 6 through a pin shaft, and a cylindrical shaft head machined on the end of the pull piece 7, which is matched and installed with the pin hole on the pull arm. The end of the pull piece 7 can be rolled into a cylindrical shape for the pin shaft to pass through, or the cylindrical shaft head can be directly machined on both sides of the end of the pull piece 7. The pull piece 7 has a certain toughness and can be bent within a certain range to adapt to the end displacement change caused by the rotation of the pull arm 6. The other end of the pull piece 7 extends backward through the hemostatic clip body 3 and extends into the clamping groove 5, and the end is bent outward to form a bent section 8. The inner side of the clip arm 4 of the hemostatic clip in the back is provided with an insertion slot 9. The bent section 8 of the clip arm 4 inserted into the clamping groove 5 can be inserted into the insertion slot 9 and has a certain gap, so that the bent section 8 can be pulled out of the insertion slot 9 after the clip arm 4 is opened. The hemostatic clip body 3 has a spacing part 10 between the two clamping grooves. The two pull pieces 7 extend into the clamping groove 5 along the two side surfaces of the spacing part, and the two side surfaces of the spacing part are the bottom of the clamping groove 5. The pull piece 7 is long and the width of the bent section 8 is smaller than that of the other parts. The clamping groove 5 is provided with an open sliding groove 11, the opening width of the sliding groove 11 is smaller than the width of the sliding groove 11, the pull piece 7 is arranged in the sliding groove 11 and can slide along the sliding groove 11, the width of the pull piece 7 is greater than the width of the opening of the sliding groove 11, and the width of the bent section 8 is smaller than the width of the opening of the sliding groove 11 and extends out of the opening of the sliding groove 11. In this way, one end of the pull piece 7 pulled by the clip arm 4 is always attached to the bottom of the clamping groove 5, preventing the pull piece 7 from being stuck in the insertion slot 9 and being pulled up when the clip arm 4 is opened, and improving the stability of the disengagement of the insertion slot 9 and the end bent section 8 of the pull piece 7 when the clip arm 4 is opened.

[0030] When the two pull tabs 7 are pushed forward, the clip arms 4 have a tendency to open, and the inner wall of the delivery tube 1 can be used to prevent the clip arms 4 from opening, so that the bent sections 8 of the pull tabs 7 do not come out of the insertion slots 9 of the clip arms 4.

[0031] The clip arms 4 are provided with locking tabs 12, which have a certain elasticity. The front end of the hemostat main body 3 is provided with at least one locking tooth 13 corresponding to the locking tabs 12. In order to enable the clip arms 4 to be locked at different angles, the locking tooth 13 is provided in multiple, and the locking tabs 12 and the locking tooth 13 cooperate to lock the rotating direction of the clip arms 4. Specifically, the locking tooth 13 is a plurality of inclined ratchet teeth toward the outside of the hemostat main body 3. The clip arms 4 rotate to drive the locking tabs 12 to rotate, and the front end of the locking tabs 12 slides over the top of the locking tooth 13 and is pressed between two locking teeth 13. The outside of the locking tooth 13 blocks the locking tabs 12 from rotating back, thereby locking the clamping state of the clip arms 4. Multiple locking teeth 13 can lock multiple clamping angle states of the clip arms 4 to adapt to different clamping forces and tissue thicknesses during surgery. The preferred number of locking teeth in this embodiment is two.

[0032] The two pull tabs 7 of the last hemostat 2 are connected to a clamp head 24, which includes two connecting arms that are connected to and can pull the pull tabs. The rear end of the clamp head is connected to a pull cable 25. Specifically, the inner side of the connecting arm is provided with an insertion slot 9 that is the same as the insertion slot 9 of the clip arm 4. The bent section 8 of the pull tab 7 is inserted into the insertion slot 9. In order to facilitate installation, the connecting head is divided into two parts and fixed with screws.

[0033] The end of the delivery tube 1 is provided with a rotating tube 14, and the inner diameter of the rotating tube 14 is equal to the inner diameter of the delivery tube 1. The hemostat main body 3 enters the rotating tube 14 from the delivery tube and is released. Specifically, the end of the delivery tube 1 is provided with a tubular connector 15, and the inner wall of the connector 15 is provided with two annular connecting grooves 16. The outer wall of the rotating tube 14 is provided with two convex rings 17 that are matched with the connecting grooves 16. The two convex rings 17 are respectively clamped into the two connecting grooves and are in sliding contact. The rotating tube 14 can rotate in the connector, and the hemostat and the rotating tube can rotate together, which is convenient for adjusting the angle of the opening of the clip arms 4 during surgery to achieve the required angle of the clip arms 4.

[0034] Two transition surfaces between the two clamping grooves 5 on the surface of the hemostatic clip body 3 are provided with flat portions Ⅰ 18, and the two flat portions Ⅰ 18 are provided with clamping grooves 19 perpendicular to the moving direction of the hemostatic clip 2. The inner wall of the rotating tube 14 is matched with the outer surface of the hemostatic clip body 3 and is in sliding fit, and the inner wall of the rotating tube 14 and the outer surface of the hemostatic clip body 3 have a slight gap, so that the hemostatic clip body 3 can slide freely forward and backward. The inner wall of the rotating tube 14 is provided with two flat portions Ⅱ 20 corresponding to the two flat portions Ⅰ 18 of the hemostatic clip body 3, and the inner wall of the flat portion Ⅱ 20 is provided with a clamping piece 21. The end of the clamping piece 21 is bent towards the outlet of the rotating tube 14, and the end of the clamping piece 21 is bent towards the hemostatic clip body 3 and can be clamped into the clamping groove 19 to prevent the hemostatic clip body 3 from retreating and easily sliding out forward. The position where the inner wall of the flat portion Ⅱ 20 is provided with the clamping piece 21 is provided with a recess 22 to accommodate the clamping piece 21 after being pushed up.

[0035] The side of the clamping groove 19 located in front is slightly inclined backward. In this way, when the hemostatic clip body 3 is pulled backward, the end of the clamping piece 21 will be tightly pressed in the clamping groove 19 to prevent slipping. The side of the clamping groove 19 located in the rear is provided with a guide surface 23 inclined backward. When the hemostatic clip 2 moves forward, the end of the clamping piece 21 slips out from the bottom of the clamping groove 19 and is pushed up along the guide surface 23. Adjusting the height of the starting point of the guide surface 23 on the side of the clamping groove 19 can adjust the force required for the end of the clamping piece 21 to escape from the clamping groove 19. For example, when the starting point height is low, the required force is small, so that the end of the clamping piece 21 can escape from the clamping groove 19. When the starting point height is high, because the vertical section of the clamping groove 19 is relatively long, the end of the clamping piece 21 needs more force to escape from the clamping groove 19 and enter the guide surface 23. Adjusting the inclination angle of the guide surface 23 can also adjust the pushing force required when the hemostatic clip 2 is pushed forward to release. When the hemostatic clip body 3 is pushed forward, the hemostatic clip 2 can be pushed out with appropriate force. When the pull rope 25 pulls the pull tab 7 backward to transmit the pulling force to the frontmost hemostatic clip 2 to make the clip arms 4 close, the hemostatic clip body 3 is prevented from retreating by the cooperation of the clamping piece and the clamping groove, which facilitates the pull rope 25 to pull the pull tab 7 to make the two clip arms 4 clamp the wound tissue to close. The clamping groove 19 of the last hemostatic clip 2 is not provided with a guide surface 23. When the hemostatic clip 2 reaches the position of the clamping piece 21, the clamping piece 21 is clamped into the clamping groove 19 to lock the last hemostatic clip 2 in the rotating tube 14.

[0036] The front end edge of the flat portion Ⅰ 18 of the hemostatic clip body 2 is provided with a rearward inclined inclined surface. The setting of the inclined surface on the front end of the flat portion Ⅰ 18 can prevent the front end edge of the hemostatic clip body 3 from being clamped by the end of the clamping piece 21, reduce the resistance when the hemostatic clip body 3 moves forward, and at the same time play a certain guiding role when the hemostatic clip body 2 enters the rotating tube 14, so that the hemostatic clip body 3 can smoothly enter the rotating tube 14. The other parts of the front end edge of the hemostatic clip body 3 are chamfered to make the hemostatic clip body 3 enter the rotating tube 14 more smoothly.

[0037] The continuous delivery of the hemostatic clip 2 also requires a hand-held structure at the end of the delivery tube 1 for the surgeon to hold, and a driving handle mechanism connected to the end of the pull cable 25 to drive the pull cable 25 to move forward and backward, which are common structures in the field and will not be described in detail here.

[0038] In use, the first hemostatic clip 2 is pushed into the rotating tube 14 by pushing the pull cable 25, when the clamping groove 19 reaches the position of the card 21, the end of the card 21 extends into the clamping groove 19, the card 21 can prevent the hemostatic clip 2 from retreating, and under a certain pushing force, the card 21 can be moved forward by being pulled out of the clamping groove 19, the pull cable 25 moves forward and backward, the pulling force is transmitted to the pull tab 7 of the first hemostatic clip 2 through the pull tab 7 and the clip arm 4, and the clip arm 4 is opened or closed, when the clip arm 4 is placed at the wound, the pull cable 25 is pulled and the pull tab 7 is moved backward, at this time the clip arm 4 is closed, when the clip arm 4 is closed to a certain extent, the locking piece 12 end is pressed into the nearest two lock teeth 13, preventing the clip arm 4 from rotating back, the lock teeth 13 are provided with a plurality of lock teeth, increasing the holding force of the clip arm 4, the locking piece 12 will slide over the next lock tooth and lock against the outside root of the lock tooth to prevent back rotation and disengagement. After the clip arm 4 is locked, the pull cable 25 is pushed forward, when the card 21 is pulled out of the clamping groove 19 and is pushed up by the guide surface 23, the hemostatic clip 2 moves forward and is pushed out of the rotating tube 14, the clamping groove 19 of the second hemostatic clip 2 reaches the card 21 and is positioned by the card 21, at this time the clip arm has extended out of the end of the rotating tube 14, continue to push the pull cable 25, the pull tab 7 of the second hemostatic clip 2 pushes the clip arm 4 to rotate and open, and separates from the bent section 8 of the pull tab 7, completing the release of the first hemostatic clip. Of course, the opening action of the clip arm 4 can also be designed to start before the hemostatic clip 2 is positioned according to the length and size of the clip arm 4, which does not affect the release of the hemostatic clip. When the clip arm 4 of the second hemostatic clip 2 is clamped to the wound, the pull cable 25 is pushed to a certain degree, and the second hemostatic clip is pushed out of the rotating tube 14 and released. When the last hemostatic clip 2 is pushed into the rotating tube 14, the second to last hemostatic clip 2 is released, and the last hemostatic clip is locked in the rotating tube 14 by the card 21 and the clamping groove 19 and is no longer released. The pull cable 25 is made of thin steel cable, rotating the pull cable 25 and the clip head 24 can drive the last hemostatic clip 2 to rotate, the clip arm 4 drives the previous hemostatic clip 2 to rotate, thereby driving the frontmost hemostatic clip 2 to rotate, the rotating tube 14 rotates synchronously with the hemostatic clip, thereby achieving 360-degree rotation adjustment of the end hemostatic clip 2. The last hemostatic clip 2 does not have a locking piece 12 and a lock tooth 13, and after the second to last hemostatic clip 2 is released, it can be used to check other hemostatic clips, and a common clip can be used or directly removed.

[0039] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A digestive endoscope continuous hemostasis clip delivery device, comprising: The delivery tube is internally provided with a plurality of front and back connected hemostatic clamps, the outer surface of the hemostatic clamp is in sliding contact with the inner wall of the delivery tube, The hemostatic clamp comprises a cylindrical hemostatic clamp body, two clamp arms are fixed at the front end of the hemostatic clamp body through a pin shaft, two clamp holding grooves capable of accommodating the clamp arms of the rear hemostatic clamp are arranged at the rear end of the hemostatic clamp body, a pull arm is arranged on one side of the root of each of the two clamp arms, a pull tab is connected to the end of the pull arm through a pin shaft, the pull tab is pulled to drive the pull arm and the clamp arm to rotate so as to open or close, the pull tab extends backward through the hemostatic clamp body and extends into the clamp holding groove, the front end of the pull tab is bent outward of the clamp holding groove to form a bent section, an insertion groove is arranged on the inner side of the clamp arm of the rear hemostatic clamp, the bent section can be inserted into the insertion groove when the clamp arm is clamped into the clamp holding groove, the bent section can be pulled out of the insertion groove when the clamp arm is opened, a spacing part is arranged between the two clamp holding grooves of the hemostatic clamp body, and the two pull tabs extend into the clamp holding groove along the two side faces of the spacing part respectively. The end part of the delivery tube is provided with a rotating tube, the inner diameter of the rotating tube is equal to the inner diameter of the delivery tube, the hemostatic clamp body passes through the rotating tube to be released, the transition surface between the openings of the two clamp holding grooves on the surface of the hemostatic clamp body is provided with a flat part I, the two flat parts I are provided with clamping grooves perpendicular to the moving direction of the hemostatic clamp, the inner wall of the rotating tube is matched with the outer surface of the hemostatic clamp body in shape and is in sliding contact, the inner wall of the rotating tube is provided with a flat part II matched in shape at the position corresponding to the two flat parts I of the hemostatic clamp body, the inner wall of the flat part II is provided with a clamping piece, the end of the clamping piece is directed toward the outlet of the rotating tube, and the end of the clamping piece is bent toward the hemostatic clamp body and can be clamped into the clamping groove to prevent the hemostatic clamp body from being pulled backward and easily sliding forward. The ends of the two pull tabs of the last hemostatic clamp are connected with a clamp head, the clamp head comprises two connecting arms, the two connecting arms are connected with the two pull tabs respectively and can pull the pull tabs to move, and the rear end of the clamp head is connected with a pull rope.

2. The device according to claim 1, wherein: The pull tab is long and narrow, the width of the bent section is smaller than that of other parts, the bottom of the clamp holding groove is provided with an open sliding groove, the opening width of the sliding groove is smaller than the width of the sliding groove, the pull tab is arranged in the sliding groove and can slide along the sliding groove, the width of the pull tab is greater than the width of the opening of the sliding groove, and the width of the bent section is smaller than the width of the opening of the sliding groove and extends out of the opening of the sliding groove.

3. The device according to claim 1, wherein: The side face of the clamping groove located at the rear side is provided with an inclined guide face inclined toward the rear side, when the hemostatic clamp moves forward, the end of the clamping piece slides out of the bottom of the clamping groove and is pushed upward along the guide face.

4. The device according to claim 3, wherein: The side face of the clamping groove located at the front side is inclined backward.

5. The device according to claim 1, wherein: The front end edge of the front end flat part I of the hemostatic clamp body is provided with an inclined face inclined backward.

6. The device according to claim 1, wherein: The locking piece is elastic and inclined toward the inner side of the hemostatic clamp, the locking tooth is a plurality of locking teeth, the clamp arm is rotated to drive the locking piece to rotate, the front end of the locking piece slides over the top of the locking tooth, and is pressed into the space between the two locking teeth, and the outer side face of the locking tooth blocks the locking piece from rotating back.

7. The device according to claim 1, wherein: The position of the clamping piece arranged on the inner wall of the flat part II is provided with a recess to accommodate the clamping piece pushed up.

8. The device according to claim 1, wherein: The outermost end of the outer side face of the clamp arm in the clamped state in the clamp holding groove is flush with the outer contour line of the cylindrical body of the hemostatic clamp body.

9. The device according to claim 1, wherein: The end of the conveying pipe is provided with a tubular connector, the inner wall of the connector is provided with two annular connecting grooves, the outer wall of the rotating pipe is provided with two convex rings matched with the connecting grooves, and the two convex rings are respectively clamped into the two connecting grooves and in sliding contact.

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