Auricularia clip

Abstract

The present application relates to an atrial appendage clamp, comprising a binding wire and a guide rod, wherein the binding wire is a hard wire with elastic deformation capability, the binding wire comprising a threading end and a free end, the threading end being provided with a threading hole, after the free end passes through the threading hole, the binding wire forms a binding ring for binding and closing the left atrial appendage, the inner side of the binding ring being evenly provided with a plurality of ratchets, the inner wall of the threading hole being fixed with a barb for engaging with the ratchets to prevent the binding ring from expanding; the guide rod being used to guide the binding ring to the surgical position, the guide rod comprising a surgical end and a gripping portion, and a connecting portion connecting the surgical end and the gripping portion together, a guide channel being provided in the guide rod along the length direction of the guide rod, the two openings of the guide channel being respectively located at the surgical end and the gripping portion, and the free end of the binding wire passing through the guide channel. The present application reduces the size of the incision required for surgery and reduces the obstruction of the surgical field of view by the atrial appendage clamp, thereby reducing the risk of surgery.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an atrial appendage clamp. Background Art

[0002] Atrial fibrillation (AF) is the most common arrhythmia, characterized by irregular heartbeats. Non-valvular AF is a highly prevalent type of AF. The left atrial appendage (LAA) is an accessory structure of the left atrium. It is a narrow, curved tubular structure with a narrow, pointed top and abundant pectinate muscles and trabeculae. In patients with AF, the entrance to the LAA is significantly widened, and the atrial appendage loses its effective and regular contraction. The movement of the atrial appendage wall makes it difficult to empty the LAA sufficiently, resulting in blood accumulation in the LAA and the subsequent thrombus formation. In non-valvular AF, more than 90% of thrombus formation is related to the LAA.

[0003] Currently, there are three main ways to prevent stroke in patients with atrial fibrillation: the first is to use anticoagulant drugs, such as warfarin; the second is to surgically remove the left atrial appendage and then suture the incision; the third is to ligate and close the left atrial appendage through left atrial appendage closure surgery. In left atrial appendage closure surgery, an atrial appendage clamp is a common device used to clamp and tie the left atrial appendage.

[0004] The atrial appendage clamp in related art includes a fixing seat, a transmission rod, and a gripping portion. The fixing seat is typically a square, ring-shaped, rigid frame structure, with a clamping rod inside the fixing seat for clamping the left atrial appendage. During the left atrial appendage closure procedure, the doctor grasps the gripping portion, inserts the fixing seat into and fits around the connection between the left atrial appendage and the atrium, and controls the clamping rod to clamp the left atrial appendage, thereby disconnecting the left atrial appendage cavity from the atrium.

[0005] Regarding the above-mentioned related technologies, the inventors found that since the fixing seat is a large rigid structure, a large incision needs to be made during surgery for the fixing seat to enter and exit. At the same time, the fixing seat will occupy a large surgical space during surgery, blocking a large surgical field of view to a certain extent, thereby increasing the risk during surgery. Summary of the Invention

[0006] In order to reduce the risk of surgery, minimize the size of the incision required for surgery, and reduce the obstruction of the surgical field of view by the atrial appendage clamp, the present application provides an atrial appendage clamp.

[0007] The present application provides an atrial appendage clamp adopting the following technical solution:

[0008] An atrial appendage clamp includes a binding wire and a guide rod, wherein the binding wire is a hard wire with elastic deformation ability, the binding wire includes a threading end and a free end, the threading end is provided with a threading hole, after the free end passes through the threading hole, the binding wire forms a binding ring for binding and closing the left atrial appendage, the inner side of the binding ring is evenly distributed with a plurality of ratchet teeth, and the inner wall of the threading hole is fixed with a barb for engaging with the ratchet teeth to prevent the binding ring from expanding;

[0009] The guide rod is used to guide the tying ring to the surgical position. The guide rod includes a surgical end, a gripping portion, and a connecting portion connecting the surgical end and the gripping portion. A guide channel is provided in the guide rod along the length of the guide rod. Two openings of the guide channel are located at the surgical end and the gripping portion, respectively.

[0010] The threading end of the tying wire is clamped at the opening position of the guide channel at the operation end, and the free end of the tying wire passes through the threading hole and then passes through the guide channel.

[0011] By adopting the above technical solution, during the left atrial appendage closure surgery, the doctor first passes the free end of the tying ring through the guide channel, so that the threading end is clamped in the hole position of the guide channel at the surgical end, and then pulls the free end to make the tying ring gradually contract, thereby achieving the tying and closure of the left atrial appendage.

[0012] Due to the elasticity of the hard binding ring itself, the binding ring can pass through a minimally invasive channel with a smaller incision, and after passing through the minimally invasive channel, it can restore its original size and maintain a relatively stable ring structure, so that the left atrial appendage can be inserted into the binding ring more easily, improving the situation in the related technology where the tissue clamping system needs to extend the rigid fixing seat into the position of the left atrial appendage to clamp the left atrial appendage, and the risk of the operation is increased because the fixing seat occupies too much surgical space.

[0013] Optionally, the binding wire is a strip structure with a square cross-section; the structure of the guide channel is adapted to the binding wire.

[0014] By adopting the above technical solution, the circumferential rotation of the tying wire is restricted, and the stability of the tying ring state is improved.

[0015] Optionally, a shearing cavity connected to the guide channel is provided inside the surgical end, a sliding hole directly connected to the shearing cavity is provided inside the guide rod, the sliding hole is connected to the outside at a position away from the shearing cavity, and the binding wire passes through the shearing cavity;

[0016] A shearing assembly for cutting the tying wire is installed in the guide rod, and the shearing assembly includes a movable shearing piece hinged on the inner wall of the shearing piece, and a push-pull rod for driving the movable shearing piece to cut, the push-pull rod is slidably connected in the sliding hole, and the blade of the movable shearing piece faces the tying wire.

[0017] By adopting the above technical solution, when the doctor pushes or pulls the push-pull rod, the movable shearing blade can be driven to rotate around the hinge axis with the shear inner wall, thereby cutting the binding wire and removing the guide rod.

[0018] Optionally, the movable shearing piece is located below the tying wire, and the connection point between the push-pull rod and the movable shearing piece is located on a side of the hinge axis of the movable shearing piece away from the shearing blade;

[0019] A strip hole is provided at one end of the movable shearing piece away from the blade, and there is a certain angle between the length direction of the strip hole and the length direction of the push-pull rod. A transmission rod is fixedly connected to the push-pull rod at a position close to the movable shearing piece, and the transmission rod is slidably connected in the strip hole.

[0020] By adopting the above technical solution, when the doctor pushes the push-pull rod, the push-pull rod moves linearly along the sliding hole, and the movable shears rotate under the push of the push-pull rod and cut the binding wire.

[0021] Optionally, a limiting pawl for limiting the position of the tying wire is provided in the guide channel, and the limiting pawl is clamped between the ratchet teeth of the tying wire.

[0022] By adopting the above technical solution, the situation where the binding wire moves toward the surgical end is reduced.

[0023] Optionally, a movable hole is provided on the gripping portion of the guide rod, and the movable hole is communicated with the guide channel;

[0024] The gripping portion of the guide rod is further provided with a lifting assembly for lifting the binding wire, the lifting assembly comprising a lifting sleeve and a return spring, wherein the lower end of the lifting sleeve is slidably connected to the movable hole, one end of the return spring is fixed to the bottom wall of the movable hole, and the other end of the return spring is fixed to the lower surface of the lifting sleeve;

[0025] The free end of the tying wire passes through the inner cavity of the lifting sleeve, and a lifting pawl is rotatably connected to the inner wall of the lifting sleeve. The end of the lifting pawl extends between the ratchet teeth of the tying wire and is clamped with the tying wire.

[0026] By adopting the above technical solution, after the doctor presses the lifting sleeve so that it is pressed into the movable hole, the lifting sleeve and the lifting pawl will move down relative to the binding line, compressing the reset spring. When the doctor releases the squeeze on the lifting sleeve, under the restoring force of the reset spring, the lifting sleeve will synchronously pull out the binding line through the lifting pawl, causing the binding ring to gradually shrink.

[0027] During this process, the free end of the binding wire is moved by the force of the reset spring, thereby tightening the binding ring, which enables the doctor to more easily control the tightening force of the binding wire, reduces the damage to the patient's left atrial appendage caused by excessive tightening of the binding ring, and reduces the surgical risk to a certain extent.

[0028] Optionally, a compression spring is fixedly connected to the side of the limiting pawl and the lifting pawl facing away from the binding wire.

[0029] By adopting the above technical solution, the limiting pawl and the lifting pawl can be stably clamped between the ratchet teeth of the tying wire under the action of the compression spring, thereby improving the stability of the limiting pawl and the lifting pawl in clamping the tying wire.

[0030] Optionally, the angle between the surgical end of the guide rod and the connecting portion is an obtuse angle.

[0031] By adopting the above technical solution, doctors can perform left atrial appendage closure surgery more smoothly.

[0032] Optionally, a slot is provided on the end surface of the surgical end facing away from the connecting portion, and the threading end of the binding wire extends into and is embedded in the slot.

[0033] By adopting the above technical solution, the stability between the binding wire and the tissue clamp is improved to a certain extent during the process of transporting the binding ring to the left atrial appendage position.

[0034] Optionally, the binding wire is a strip made of a common plastic material in medical applications.

[0035] By adopting the above technical solution, the impact of the binding wire itself on the health status of the surgical patient is reduced.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. The binding wire is guided to the position of the left atrial appendage through a guide rod, and the left atrial appendage is bound by a rigid binding wire with elastic deformation ability, replacing the technical means of clamping the left atrial appendage with a fixed seat in the related art, reducing the surgical space occupied by the rigid fixed seat, and reducing the obstruction of the surgical field by the fixed seat, thereby reducing the risk during the operation;

[0038] 2. By setting a shearing assembly in the guide rod, the doctor can cut the binding wire after binding and closing the left atrial appendage;

[0039] 3. By arranging a lifting assembly on the guide rod, the doctor can tighten the tying ring more conveniently, and use the restoring force of the reset spring to lift the tying wire, so that the tension on the tying wire is more stable, reducing the damage to the patient caused by excessive tightening of the tying ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the overall structure of the auricle clip in the embodiment of the present application.

[0041] Figure 2 It is a cross-sectional view of the internal structure of the auricle clip in an embodiment of the present application.

[0042] Figure 3 yes Figure 2 Enlarged view of part A.

[0043] Figure 4 It is a cross-sectional view of the internal structure of the gripping portion in an embodiment of the present application.

[0044] Explanation of the accompanying reference numerals: 1. tying wire; 11. threading end; 111. threading hole; 112. barb; 12. free end; 13. tying ring; 14. ratchet; 15. accommodating groove; 2. guide rod; 21. surgical end; 211. card slot; 212. shearing cavity; 22. gripping part; 221. operating hole; 2211. operating block; 222. movable hole; 23. connecting part; 24. guide channel; 241. limiting pawl; 25. sliding hole; 26. shearing assembly; 261. movable shearing blade; 2611. strip hole; 262. push-pull rod; 2621. transmission rod; 263. compression spring; 27. lifting assembly; 271. lifting sleeve; 272. return spring; 273. lifting pawl; 28. compression spring. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-4 This application is described in further detail.

[0046] The embodiment of the present application discloses an atrial appendage clip. Figure 1 and Figure 2 The atrial appendage clamp includes a binding wire 1 and a guide rod 2, wherein the binding wire 1 is a hard wire with elastic deformation ability, and the material of the binding wire 1 is a common plastic material used in medical fields, such as hard silicone, polyester resin or polytetrafluoroethylene, so as to reduce the impact of the binding wire 1 itself on the patient's physical condition.

[0047] Reference Figure 1 and Figure 3 The tying wire 1 includes a threading end 11 and a free end 12. The threading end 11 is provided with a threading hole 111. After the free end 12 passes through the threading hole 111, the tying wire 1 is enclosed to form a tying ring 13 for clamping the left atrial appendage. A plurality of ratchets 14 are evenly distributed on the inner side of the tying ring 13. A barb 112 is fixed on the inner wall of the threading hole 111 for engaging with the ratchets 14 to prevent the tying ring 13 from expanding.

[0048] Reference Figure 1 and Figure 2 The guide rod 2 is used to guide the tying ring 13 to the surgical site. The guide rod 2 includes a surgical end 21, a gripping portion 22, and a rod-shaped connecting portion 23 that connects the surgical end 21 and the gripping portion 22. A guide channel 24 is defined along the length of the guide rod 2, with two openings located at the surgical end 21 and the gripping portion 22, respectively.

[0049] During LAA closure surgery, the surgeon first inserts the free end 12 of the tying wire 1 through the threading hole 111, then extends it from the surgical end 21 into the guide channel 24 and out of the grip 22. The threading end 11 of the tying wire 1 is now engaged with the opening of the guide channel 24 at the surgical end 21. The surgeon then pulls the free end 12, causing the tying ring 13 to gradually contract and tighten the LAA, closing it and disabling communication between the LAA cavity and the atrium.

[0050] Because the rigid binding ring 13 itself has sufficient elastic deformation capacity, the binding ring 13 can pass through a minimally invasive channel with a smaller incision and restore its original size and relatively stable ring structure after passing through the minimally invasive channel. The stable ring structure allows the left atrial appendage to be more easily inserted into the binding ring 13. As the binding ring 13 is tightened, the obstruction of the surgical field of view is gradually reduced, thereby improving the situation in the related art where the atrial appendage clamp needs to extend the rigid fixing seat into the position of the left atrial appendage to clamp the left atrial appendage, which increases the risk of surgery due to the fixing seat occupying too much surgical space.

[0051] In order to make it easier for doctors to perform left atrial appendage closure surgery, the angle between the surgical end 21 and the connecting portion 23 is set to be an obtuse angle. In this application, the angle between the connecting portion 23 and the surgical end 21 is 120°.

[0052] Reference Figure 1 and Figure 3 Preferably, the cross-sectional shape of the tying wire 1 is square, and the cross-sectional shape of the guide channel 24 is adapted to the tying wire 1 .

[0053] When the doctor pulls the free end 12 of the tying wire 1, the tying wire 1 is circumferentially restricted in the guide channel 24, which reduces the circumferential rotation of the tying wire 1 and improves the stability of the tying ring 13 during surgery.

[0054] A receiving groove 15 is provided on one side wall of the binding wire 1 along the length direction of the binding wire 1, and multiple ratchets 14 are neatly arranged in the receiving groove 15, which minimizes the contact and hooking between the ratchets 14 and tissues other than the left atrial appendage in the surgical environment, thereby improving the safety of the surgical process.

[0055] Furthermore, a slot 211 is defined on the end face of the surgical end 21 facing away from the connecting portion 23, and the slot 211 communicates with the guide channel 24. The threading end 11 of the binding wire 1 is inserted into and embedded in the slot 211, while the free end 12 passes through the threading hole 111 and then into the guide channel 24. The cooperation between the slot 211 and the threading end 11 improves the stability between the binding wire 1 and the surgical end 21 during the delivery of the binding ring 13 to the left atrial appendage, thereby reducing the risk of the operation.

[0056] Reference Figure 2 and Figure 3 A shearing lumen 212 communicating with the guide channel 24 is provided inside the surgical end 21, and the tying wire 1 passes through the entire shearing lumen 212. A sliding hole 25 directly communicating with the shearing lumen 212 is provided inside the guide rod 2 along the length direction of the guide rod 2. The sliding hole 25 is communicated with the outside world at a position away from the shearing lumen 212, and the sliding hole 25 is not directly connected to the guide channel 24.

[0057] A shearing assembly 26 for cutting the tying wire 1 is installed in the guide rod 2. The shearing assembly 26 includes a movable shearing piece 261 hinged on the side wall of the shearing cavity 212, and a push-pull rod 262 for driving the movable shearing piece 261 to cut. The blade of the movable shearing piece 261 is set toward the tying wire 1, and the push-pull rod 262 is slidably connected in the sliding hole 25.

[0058] The main body of the movable shearing piece 261 is a plate-shaped structure, and the cutting edge of the movable shearing piece 261 is arranged perpendicular to the main body plate toward the binding wire 1, so that the movable shearing piece 261 is in an "L" shape as a whole.

[0059] There are many ways to arrange the shearing assembly 26 , and the shearing movement process of the shearing assembly 26 is different under different arrangement modes.

[0060] When the movable shearing piece 261 and the push-pull rod 262 are both arranged on the upper side of the tying wire 1, and the cutting edge of the movable shearing piece 261 and the push-pull rod 262 are respectively located on both sides of the hinge point, when the push-pull rod 262 moves away from the shearing inner cavity 212 along the sliding hole 25, the blade of the movable shearing piece 261 rotates downward under the pulling force of the push-pull rod 262 and cuts the tying wire 1;

[0061] When the movable shearing piece 261 and the push-pull rod 262 are both arranged on the upper side of the tying wire 1, and the cutting edge of the movable shearing piece 261 and the push-pull rod 262 are respectively located on the same side of the hinge point, when the push-pull rod 262 extends into the shearing cavity 212 along the sliding hole 25, the blade of the movable shearing piece 261 rotates downward under the thrust of the push-pull rod 262 and cuts the tying wire 1;

[0062] When the movable shear piece 261 is set on the lower side of the tying line 1, the push-pull rod 262 extends from the upper side of the tying belt into the shearing cavity 212 and is connected to the movable shear piece 261, and the shear blade and the push-pull rod 262 are respectively located on both sides of the hinge point. When the push-pull rod 262 extends into the shearing cavity 212 along the sliding hole 25, the blade of the movable shear piece 261 rotates upward under the thrust of the push-pull rod 262 and cuts the tying line 1.

[0063] The shearing assembly 26 in this embodiment is described using the last of the three aforementioned layout methods.

[0064] Reference Figure 3 The hinge axis between the movable shearing piece 261 and the side wall of the shearing cavity 212 is located at the central position of the main body of the movable shearing piece 261. A waist-shaped strip hole 2611 is opened along the length direction of the movable shearing piece 261 at the end of the movable shearing piece 261 away from the shearing blade. At this time, there is a certain angle between the length direction of the strip hole 2611 and the length direction of the push-pull rod 262.

[0065] A transmission rod 2621 is vertically fixed to the sidewall of one end of the push-pull rod 262, which is closest to the movable shearing piece 261. The diameter of the transmission rod 2621 matches the width of the strip hole 2611. The transmission rod 2621 is slidably connected within the strip hole 2611. The transmission rod 2621 can slide along the length of the strip hole 2611 and can also rotate relative to the strip hole 2611, thus achieving a sliding connection between the push-pull rod 262 and the movable shearing piece 261 and a rotational connection at the same time.

[0066] Reference Figure 4 The lower end of the outer wall of the grip portion 22 defines a strip-shaped operating hole 221 that communicates with the sliding hole 25. The length of the operating hole 221 aligns with the length of the sliding hole 25. An operating block 2211 is slidably connected within the operating hole 221. One end of the operating block 2211 extends into the sliding hole 25 and is fixedly connected to the push-pull rod 262. The other end of the operating block 2211 extends out of the operating hole 221. The doctor uses the operating block 2211 to control the linear movement of the push-pull rod 262 along the length of the sliding hole 25.

[0067] Reference Figure 3 In order to reduce the situation where the movable shearing piece 261 is stuck to the tying wire 1 and affects the tightening process of the tying wire 1, a compression spring 263 is fixed to the side of the end of the movable shearing piece 261 away from the shear blade and facing away from the tying wire 1.

[0068] Reference Figure 4 A limiting pawl 241 is hinged in the guide channel 24 for limiting the moving direction of the tying wire 1. The limiting pawl 241 is clamped between the ratchet teeth 14 of the tying wire 1, reducing the situation where the tying wire 1 moves toward the surgical end 21 as a whole during the operation.

[0069] In this embodiment, the gripping portion 22 of the guide rod 2 is further provided with a pulling assembly 27 for pulling the binding wire 1 . The pulling assembly 27 includes a pulling sleeve 271 and a return spring 272 .

[0070] A movable hole 222 is coaxially defined on the end face of the gripping portion 22 of the guide rod 2, facing away from the connecting portion 23, and is adapted to fit within the lifting sleeve 271. This movable hole 222 communicates with the guide channel 24. The lower half of the lifting sleeve 271 extends into and slidably engages within the movable hole 222. A return spring 272 is secured to the bottom wall of the movable hole 222 at one end, and to the lower surface of the lifting sleeve 271 at the other end, securing the lifting sleeve 271 within the movable hole 222 via the return spring 272.

[0071] The free end 12 of the tying wire 1 passes through the inner cavity of the pulling sleeve 271 and extends out of the guide rod 2. A pulling pawl 273 is rotatably connected to the inner wall of the pulling sleeve 271, and the end of the pulling pawl 273 extends between the ratchet teeth 14 of the tying wire 1 and engages with the ratchet teeth 14 of the tying wire 1.

[0072] During surgery, the doctor presses the lifting sleeve 271 into the movable hole 222. The tying wire 1 is held in place by the stop pawl 241, while the lifting sleeve 271 and the lifting pawl 273 move downward relative to the tying wire 1. When the doctor releases the lifting sleeve 271, the lifting sleeve 271, under the restoring force of the return spring 272, drives the free end 12 of the tying wire 1 away from the tying ring 13 via the lifting pawl 273, causing the tying ring 13 to gradually shrink.

[0073] During this process, the free end 12 of the tying wire 1 is moved by the relatively constant force of the reset spring 272, thereby tightening the tying ring 13, which enables the doctor to more easily control the tightening force of the tying ring 13, reduces the damage to the patient's left atrial appendage due to excessive tightening of the tying ring 13, and reduces the surgical risk to a certain extent.

[0074] In other embodiments, the limiting pawl 241 and the lifting pawl 273 may also be elastic barbed structures, and the limiting pawl 241 is fixed in the guide channel 24. The strapping belt is continuously clamped by its own elasticity to limit the moving direction of the strapping belt.

[0075] Reference Figure 4 Furthermore, in order to enable the limiting pawl 241 and the lifting pawl 273 to be stably engaged between the ratchet teeth 14 of the tying wire 1, thereby improving the stability of the limiting pawl 241 and the lifting pawl 273 in engaging the tying wire 1, a compression spring 28 is fixed to the side wall of the limiting pawl 241 and the lifting pawl 273 facing away from the tying wire 1.

[0076] The implementation principle of an atrial appendage clamp in the embodiment of the present application is as follows:

[0077] During left atrial appendage closure surgery, when the left atrial appendage needs to be ligated and closed, the gripping portion 22 of the guide rod 2 is held, and the tying ring 13 of the surgical end 21 is guided through the surgical incision to the position of the left atrial appendage and is sleeved around the left atrial appendage.

[0078] Then, the lifting sleeve 271 is repeatedly pressed several times, so that the lifting sleeve 271 slides relative to the binding wire 1. Under the restoring force of the return spring 272, the lifting sleeve 271 gradually pulls the binding wire 1, so that the binding ring 13 on the binding wire 1 is tightened, until the return spring 272 can no longer drive the lifting sleeve 271 back to its original position. At this time, the inner cavity of the left atrial appendage is no longer connected to the inner cavity of the atrium, achieving the effect of ligating and sealing the left atrial appendage.

[0079] Finally, the doctor pushes the operating block 2211, causing the push-pull rod 262 to slide along the direction of the sliding hole 25. Under the thrust of the push-pull rod 262, the cutting blade of the movable shear 261 rotates upward, cutting the binding wire 1, and then taking out the guide rod 2, completing the closure of the left atrial appendage.

[0080] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An atrial appendage clip, characterized by: The invention comprises a binding wire (1) and a guide rod (2), wherein the binding wire (1) is a hard wire with elastic deformation capability, the binding wire (1) comprises a threading end (11) and a free end (12), the threading end (11) is provided with a threading hole (111), after the free end (12) passes through the threading hole (111), the binding wire (1) is enclosed to form a binding ring (13) for binding and closing the left atrial appendage, a plurality of ratchet teeth (14) are evenly distributed on the inner side of the binding ring (13), and a barb (112) is fixed on the inner wall of the threading hole (111) for engaging with the ratchet teeth (14) to prevent the binding ring (13) from expanding; The guide rod (2) is used to guide the tying ring (13) to the surgical position. The guide rod (2) comprises a surgical end (21), a gripping portion (22), and a connecting portion (23) connecting the surgical end (21) and the gripping portion (22). A guide channel (24) is provided in the guide rod (2) along the length direction of the guide rod (2). Two openings of the guide channel (24) are respectively located at the surgical end (21) and the gripping portion (22). The threading end (11) of the tying wire (1) is clamped at the opening of the guide channel (24) at the surgical end (21), and the free end (12) of the tying wire (1) passes through the threading hole (111) and then passes through the guide channel (24); The binding wire (1) is a strip structure with a square cross section; the structure of the guide channel (24) is adapted to the binding wire (1); The surgical end (21) is provided with a shearing inner cavity (212) in communication with the guide channel (24); the guide rod (2) is provided with a sliding hole (25) in direct communication with the shearing inner cavity (212); the sliding hole (25) is in communication with the outside at a position away from the shearing inner cavity (212); and the binding wire (1) passes through the shearing inner cavity (212); A shearing assembly (26) for cutting the binding wire (1) is installed in the guide rod (2), and the shearing assembly (26) includes a movable shearing piece (261) hinged on the side wall of the shearing cavity, and a push-pull rod (262) for driving the movable shearing piece (261) to shear, the push-pull rod (262) is slidably connected in the sliding hole (25), and the blade of the movable shearing piece (261) faces the binding wire (1).

2. The atrial appendage clamp according to claim 1, characterized in that: The movable shearing piece (261) is located below the binding line (1), and the connection point between the push-pull rod (262) and the movable shearing piece (261) is located on the side of the hinge axis of the movable shearing piece (261) away from the shear blade; A strip hole (2611) is provided at one end of the movable shearing piece (261) away from the blade, and a certain angle is formed between the length direction of the strip hole (2611) and the length direction of the push-pull rod (262). A transmission rod (2621) is fixedly connected to the push-pull rod (262) at a position close to the movable shearing piece (261), and the transmission rod (2621) is slidably connected in the strip hole (2611).

3. The atrial appendage clamp according to claim 1, characterized in that: A limiting pawl (241) for limiting the moving direction of the binding wire (1) is provided in the guide channel (24), and the limiting pawl (241) is clamped between the ratchet teeth (14) of the binding wire (1).

4. The atrial appendage clamp according to claim 3, characterized in that: A movable hole (222) is provided on the gripping portion (22) of the guide rod (2), and the movable hole (222) is communicated with the guide channel (24); The gripping portion (22) of the guide rod (2) is provided with a pulling assembly (27) for pulling the binding wire (1), and the pulling assembly (27) includes a pulling sleeve (271) and a return spring (272), wherein the lower end of the pulling sleeve (271) is slidably connected in the movable hole (222), one end of the return spring (272) is fixed to the bottom wall of the movable hole (222), and the other end of the return spring (272) is fixed to the lower surface of the pulling sleeve (271); The free end (12) of the tying wire (1) passes through the inner cavity of the lifting sleeve (271), and a lifting pawl (273) is rotatably connected to the inner wall of the lifting sleeve (271), and the end of the lifting pawl (273) extends between the ratchet teeth (14) of the tying wire (1) and is engaged with the tying wire (1).

5. The atrial appendage clamp according to claim 4, characterized in that: A compression spring (28) is fixedly connected to the side of the limiting pawl (241) and the lifting pawl (273) facing away from the binding wire (1).

6. The atrial appendage clamp according to claim 1, characterized in that: The angle between the surgical end (21) and the connecting portion (23) of the guide rod (2) is an obtuse angle.

7. The atrial appendage clamp according to claim 1, characterized in that: A slot (211) is provided on the end surface of the surgical end (21) facing away from the connecting portion (23), and the threading end (11) of the binding wire (1) extends into and is embedded in the slot (211).

8. The atrial appendage clamp according to claim 1, characterized in that: The binding wire (1) is a strip made of a plastic material commonly used in medical treatment.

Images