A root tissue ligation device

Abstract

The present invention relates to a root tissue ligation device, comprising a telescopic component, a ligation component and a wire take-up rod, the ligation component comprising a ligation sleeve, a ligation line, a positioning bolt and a knot pusher, the positioning bolt is arranged at the front end of the telescopic end of the telescopic component, the length of the telescopic component is retractable, the front end of the ligation sleeve is arranged in an annular manner and both ends are fixed to the front end of the positioning bolt, a ligation line fixing groove is provided on the inner side of the ligation sleeve, one end of the ligation line is wound around the middle of the ligation line to form an upper hanging knot, so that the front end of the ligation line is surrounded to form a loop, the loop is arranged in the ligation line fixing groove, the rear end of the ligation line passes through the positioning bolt and is connected to one end of the wire take-up rod, the wire take-up rod is arranged in the telescopic component, and the other end of the wire take-up rod is exposed outside the inner sleeve. The present invention has a simple structure and a low manufacturing cost, and can ligate root tissue (such as auricle) with a small wound and low risk.

Description

Technical Field

[0001] The invention relates to a root tissue ligation device. Background Art

[0002] Atrial fibrillation (AF for short) is one of the most common arrhythmias in clinical practice. Domestic and foreign studies have shown that the total incidence of atrial fibrillation in the population is 0.89%. Another 16%-21.5% of strokes (stroke, also known as apoplexy or cerebrovascular accident, is a group of acute cerebrovascular diseases with sudden onset and focal neurological dysfunction as a common feature) are caused by the detachment of thrombi caused by atrial fibrillation, and stroke caused by non-valvular atrial fibrillation accounts for 50%-67.1% of cardiogenic stroke cases. The annual incidence of stroke in patients with atrial fibrillation is >4%, and the mortality and disability rates caused by stroke can reach about 50%. Therefore, preventing atrial fibrillation stroke has important clinical significance.

[0003] Anticoagulation therapy is currently the standard method for preventing stroke complications of atrial fibrillation, but anticoagulation therapy has certain limitations. For example, some patients cannot take anticoagulation due to contraindications or relative contraindications to anticoagulation, or anticoagulants are easily affected by drugs and food, which increases the trouble of testing, making it impossible for some patients to adhere to anticoagulation therapy for a long time. In addition, anticoagulation therapy itself also has bleeding complications, which reduce the long-term anticoagulation adherence rate of patients and limit the role of anticoagulation therapy. Therefore, it is of great significance to adopt more effective and safe measures to prevent atrial fibrillation stroke.

[0004] At present, the method of occluding the left atrial appendage using medical interventional treatment has also been greatly developed. This treatment technology is a good choice for patients with severe bleeding and patients with contraindications to anticoagulation. There are two commonly used left atrial appendage occlusion techniques: one is to occlude the left atrial appendage using a percutaneous left atrial appendage transcatheter occlusion device (PLAATO), which is commonly seen in Appriva Medical; the other is to occlude the left atrial appendage using an Amplazer atrial septal occlusion umbrella. The method of occluding the left atrial appendage using the PLAATO device has been highly regarded for its advantages such as low surgical trauma, high success rate, and low incidence of thromboembolism, but its surgical complication, pericardial hemorrhage, has a high incidence rate, currently about 6.9%, so it is necessary to further improve the design structure of the device and accumulate surgical experience. As for the Amplazer occluder, many experts believe that it is not a suitable LAA (percutaneous left atrial appendage closure) occlusion device. It is not specially designed for LAA occlusion, but for atrial defects. Therefore, they believe that if there is no suitable equipment, it is better not to force the left atrial appendage occlusion surgery.

[0005] It is simple and easy to remove or close the left atrial appendage at the same time during cardiac surgery, so many doctors advocate that such patients should be treated with cardiac surgery and the left atrial appendage should be removed or closed at the same time. However, it is not suitable to perform surgery for only removing or closing the left atrial appendage because the surgical trauma is very large. In 1996, Odell et al. reported the technology of thoracoscopic closure of the left atrial appendage to prevent atrial fibrillation embolism. Because the trauma and risk of the operation were greatly reduced, the thoracoscopic closure of the left atrial appendage has received widespread attention. If the effect of the left atrial appendage closure in this technology can be further improved, the thoracoscopic closure of the left atrial appendage to prevent atrial fibrillation embolism has a good application prospect. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a root tissue ligation device in view of the above shortcomings.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A root tissue ligation device comprises a telescopic component, a ligation component and a wire take-up rod, the ligation component comprises a ligation sleeve, a ligation line, a positioning bolt and a knot pusher, the positioning bolt is arranged at the front end of the telescopic end of the telescopic component, the length of the telescopic component is retractable, the front end of the ligation sleeve is arranged in an annular manner and both ends are fixed to the front end of the positioning bolt, a ligation line fixing groove is opened on the inner side of the ligation sleeve, one end of the ligation line is wound around the middle of the ligation line to form an upper hanging knot, so that the front end of the ligation line is surrounded to form a loop, the loop is arranged in the ligation line fixing groove, the rear end of the ligation line passes through the positioning bolt and is connected to one end of the wire take-up rod, and the wire take-up rod can be slidably arranged in the telescopic component;

[0009] The knot pusher includes a cylindrical sleeve and a push rod. The cylindrical sleeve is covered and arranged on the outside of the ligature and is located at the rear end of the upper knot. The front end of the push rod is connected with the cylindrical sleeve. The rear end of the push rod passes through the positioning bolt. The push rod is used to push the cylindrical sleeve to move the upper knot toward the front end to close the noose.

[0010] Furthermore, the telescopic assembly includes an outer sleeve and an inner sleeve, the outer sleeve is covered on the outside of the inner sleeve, the inner sleeve can slide along the outer sleeve, and the positioning bolt is arranged at the front end of the inner sleeve.

[0011] Furthermore, the cross-sectional shape of the outer sleeve is U-shaped, a slide groove is arranged on the outer side of the inner sleeve, a protrusion cooperating with the slide groove is arranged on the inner side of the U-shaped outer sleeve, and the outer sleeve can slide parallel to the outer side of the inner sleeve.

[0012] Furthermore, a rear positioning bolt is provided at the rear end of the inner sleeve, and the rear ends of the wire take-up rod and the knot pusher penetrate the rear positioning bolt, and the wire take-up rod and the knot pusher can slide along the rear positioning bolt.

[0013] Furthermore, a handle is provided at the bottom of the outer sleeve, a square through hole is provided on the side of the outer sleeve, and a trigger is provided on the handle for clamping the inner sleeve so that the inner sleeve cannot slide in the outer sleeve.

[0014] Furthermore, a first piston is provided in the middle of the push rod, a first piston groove is provided in the inner sleeve located outside the first piston along the axial direction of the push rod, the first piston is provided in the first piston groove, a second piston is provided at the end of the wire take-up rod away from the ligature line, the inner sleeve is located outside the second piston and has a second piston groove along the axial direction of the wire take-up rod, the second piston is provided in the second piston groove, the first piston groove is connected to one end in the same direction as the second piston groove, when the knot pusher pushes the upper hanging knot to move toward the front end, the first piston moves forward in the first piston groove and pushes the second piston to move in the direction of the second piston groove, so that the wire take-up rod pulls the rear end of the ligature line to move in the opposite direction.

[0015] Furthermore, a groove is vertically opened in the middle of the cylindrical sleeve, a blade is arranged in the groove, and moving mechanisms are arranged on both sides of the blade, and the moving mechanisms are used to drive the blade to move to cut the ligature.

[0016] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The invention has a simple structure and low manufacturing cost, and can ligate root tissue (such as auricle) with a small wound surface and low risk.

[0018] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 3 is a cross-sectional schematic diagram of an outer casing;

[0022] Figure 4 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention;

[0023] Figure 5 is a schematic cross-sectional structural diagram of another embodiment of the present invention;

[0024] Figure 6 is a cross-sectional schematic diagram of another embodiment of an outer sleeve;

[0025] Figure 7 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention;

[0026] Figure 8 is a schematic cross-sectional structural diagram of another embodiment of the present invention;

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of the cylinder sleeve;

[0028] Fig.10 It is a usage state diagram of the present invention;

[0029] Fig.11 It is a usage state diagram of the present invention;

[0030] Fig.12 Schematic diagram of the root tissue after ligation.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1. Telescopic assembly; 11. Outer sleeve; 111. Square through hole; 12. Inner sleeve; 121. Slide groove; 13. Handle; 131. Trigger; 2. Ligation assembly; 21. Ligation sleeve; 211. Ligation line fixing groove; 22. Ligation line; 221. Upper hanging knot; 23. Positioning bolt; 24. Knot pusher; 241. Cylinder sleeve; 242. Push rod; 243. First piston; 244. First piston groove; 245. Blade; 246. Moving mechanism; 25. Rear positioning bolt; 3. Take-up rod; 31. Second piston; 32. Second piston groove. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0035] Embodiment 1, as Figure 1 and Figure 2 As shown, a root tissue ligation device comprises a telescopic component 1, a ligation component 2 and a wire-collecting rod 3, wherein the ligation component 2 comprises a ligation sleeve 21, a ligation line 22, a positioning bolt 23 and a knot pusher 24, wherein the positioning bolt 23 is arranged at the front end of the telescopic end of the telescopic component 1, and the length of the telescopic component 1 is retractable, the front end of the ligation sleeve 21 is arranged in an annular manner and both ends are fixed to the front end of the positioning bolt 23, and a ligation line fixing groove 211 is provided on the inner side of the ligation sleeve 21, as shown in FIG. Figure 3As shown, the cross-sectional shape of the ligature wire fixing groove 211 is circular, and the axis of the ligature wire fixing groove is located below the axis of the ligature sleeve 21, one end of the ligature wire 22 is wound around the middle of the ligature wire 22 to form an upper hanging knot 221, so that the front end of the ligature wire 22 is surrounded to form a loop, and the loop is arranged in the ligature wire fixing groove 211, and the rear end of the ligature wire 22 passes through the positioning bolt 23 and is connected with one end of the wire take-up rod 3, the wire take-up rod 3 is arranged in the telescopic assembly 1, and the other end of the wire take-up rod 3 is exposed outside the inner sleeve 12, and the knot pusher 24 can be slidably arranged in the positioning bolt 23 to push the upper hanging knot 221 to make the loop converge and disengage from the ligature wire fixing groove 211.

[0036] Embodiment 2, as Figure 4 and Figure 5 As shown, a root tissue ligation device comprises a telescopic component 1, a ligation component 2 and a wire-collecting rod 3, wherein the ligation component 2 comprises a ligation sleeve 21, a ligation line 22, a positioning bolt 23 and a knot pusher 24, wherein the positioning bolt 23 is arranged at the front end of the telescopic end of the telescopic component 1, and the length of the telescopic component 1 is retractable, the front end of the ligation sleeve 21 is arranged in an annular manner and both ends are fixed to the front end of the positioning bolt 23, and a ligation line fixing groove 211 is provided on the inner side of the ligation sleeve 21, as shown in FIG. Figure 6 As shown, the cross-sectional shape of the ligature wire fixing groove 211 is circular, and the axis of the ligature wire fixing groove 211 and the axis of the ligature sleeve 21 are arranged on the same horizontal plane, one end of the ligature wire 22 is wound around the middle of the ligature wire 22 to form an upper hanging knot 221, so that the front end of the ligature wire 22 is surrounded to form a noose, and the noose is arranged in the ligature wire fixing groove 211, and the rear end of the ligature wire 22 passes through the positioning bolt 23 and is connected with one end of the wire take-up rod 3, the wire take-up rod 3 is arranged in the telescopic assembly 1, and the other end of the wire take-up rod 3 is exposed outside the inner sleeve 12, and the knot pusher 24 can be slidably arranged in the positioning bolt 23 to push the upper hanging knot 221 to make the noose converge and detach from the ligature wire fixing groove 211.

[0037] As an embodiment, the telescopic assembly 1 includes an outer sleeve 11 and an inner sleeve 12 , the outer sleeve 11 is covered on the outside of the inner sleeve 12 , the inner sleeve 12 can slide along the outer sleeve 11 , and the positioning bolt 23 is arranged at the front end of the inner sleeve 12 .

[0038] As an embodiment, the cross-sectional shape of the outer sleeve 11 is U-shaped, a slide groove 121 is provided on the outer side of the inner sleeve 12, and a protrusion cooperating with the slide groove 121 is provided on the inner side of the U-shaped outer sleeve 11. The outer sleeve 11 can slide parallel to the outer side of the inner sleeve 12.

[0039] As an embodiment, the knot pusher 24 includes a cylindrical sleeve 241 and a push rod 242. The cylindrical sleeve 241 is covered and arranged on the outside of the ligature 22 and is located at the rear end of the upper knot 221. The front end of the push rod 242 is connected to the cylindrical sleeve 241, and the rear end of the push rod 242 passes through the positioning bolt 23. The push rod 242 is used to push the cylindrical sleeve 241 to move the upper knot 221 toward the front end to tighten the noose.

[0040] As an embodiment, a rear positioning bolt 25 is provided at the rear end of the inner sleeve 12 , and the rear ends of the wire take-up rod 3 and the knot pusher 24 pass through the rear positioning bolt 25 , and the wire take-up rod 3 and the knot pusher 24 can slide along the rear positioning bolt 25 .

[0041] The rear ends of the wire take-up rod 3 and the push rod 242 are hand-held ends, and the outer sides of the hand-held ends of the wire take-up rod 3 and the push rod 242 are provided with anti-slip grooves.

[0042] like Figure 7 As shown, as an embodiment, a handle 13 is provided at the bottom of the outer sleeve 11, a square through hole 111 is opened on the side of the outer sleeve 11, and a trigger 131 is provided on the handle 13 for clamping the inner sleeve 12 so that the inner sleeve 12 cannot slide in the outer sleeve 11; in this embodiment, a rubber sleeve is provided on the top of the trigger 131, and a torque spring is provided in the middle of the trigger 131, and the torque spring increases the elastic force so that the rubber sleeve on the top of the trigger 131 is close to the lower end surface of the inner sleeve 12, and the rubber sleeve prevents the inner sleeve 12 from sliding in the outer sleeve 11;

[0043] During use, the user presses the trigger 131 to rotate the trigger while the rubber sleeve on the top of the trigger moves away from the lower end surface of the inner sleeve, and uses the thumb to slide the inner sleeve in the direction through hole area.

[0044] like Figure 8 As shown, as an embodiment, a first piston 243 is provided in the middle of the push rod 242, and a first piston groove 244 is provided in the inner sleeve 12 on the outside of the first piston 243 along the axial direction of the push rod 242, the first piston 243 is arranged in the first piston groove 244, and a second piston 31 is provided at one end of the wire take-up rod 3 away from the ligature 22, the inner sleeve 12 is provided with a second piston groove 32 on the outside of the second piston 31 along the axial direction of the wire take-up rod 3, the second piston 31 is arranged in the second piston groove 32, the first piston groove 244 is connected to one end in the same direction as the second piston groove 31, when the knot pusher 24 pushes the upper hanging knot 221 to move toward the front end, the first piston 243 moves forward in the first piston groove 244 and pushes the second piston 32 to move in the second piston groove 32, so that the wire take-up rod 3 pulls the rear end of the ligature 22 to move in the opposite direction.

[0045] like Fig. 9As shown, as an embodiment, a groove is vertically opened in the middle of the cylindrical sleeve 241, a blade 245 is arranged in the groove, and moving mechanisms 246 are arranged on both sides of the blade 245, and the moving mechanisms 246 are used to drive the blade 245 to move to cut the ligature 22;

[0046] A push handle 2421 is provided at the rear end of the push rod 242, and the push handle 2421 is triangular in shape. A groove is provided on the side of the outer sleeve 11 for the push handle 2421 to slide in the groove. A control button is provided on the push handle 2421, and the control button is connected to the moving mechanism 246. When the user triggers the control button, the moving mechanism drives the blade to move to cut the ligature.

[0047] The method of using the present invention comprises the following steps:

[0048] Step 1, wrap the front end of the ligation sleeve 21 around the middle of the ligation sleeve 21 to form an upper hanging knot 221, and fix the rear end of the ligation sleeve 21 on the take-up rod 3;

[0049] Step 2: Figure 7 As shown, the telescopic end of the telescopic mechanism is pushed to move the ligation sleeve 21 toward the root tissue of the patient, and the ligation sleeve 21 is moved so that the front end of the ligation line 22 moves around the outside of the root tissue;

[0050] Step 3: Figure 8 As shown, the knot pusher 24 is pushed to push the upper hanging knot 221 forward to tighten the loop of the ligature 22, so that the loop is reduced to shrink the root component;

[0051] Step 4: Fig. 9 As shown, cut off the excess ligature and remove the ligature device.

[0052] The above is an example of the best implementation of the present invention, and the parts not described in detail are common knowledge of ordinary technicians in the field. The protection scope of the present invention shall be based on the content of the claims, and any equivalent transformation based on the technical enlightenment of the present invention is also within the protection scope of the present invention.

Claims

1. A root tissue ligation device, characterized in that: The invention comprises a telescopic component (1), a ligation component (2) and a wire-taking rod (3), wherein the ligation component (2) comprises a ligation sleeve (21), a ligation line (22), a positioning bolt (23) and a knot pusher (24), wherein the positioning bolt (23) is arranged at the front end of the telescopic end of the telescopic component (1), and the length of the telescopic component (1) is retractable, the front end of the ligation sleeve (21) is arranged in an annular shape and both ends are fixed to the front end of the positioning bolt (23), a ligation line fixing groove (211) is provided on the inner side of the ligation sleeve (21), one end of the ligation line (22) is wound around the middle of the ligation line (22) to form an upper hanging knot (221), so that the front end of the ligation line (22) is surrounded to form a loop, and the loop is arranged in the ligation line fixing groove (211), the rear end of the ligation line (22) passes through the positioning bolt (23) and is connected to one end of the wire-taking rod (3), and the wire-taking rod (3) is slidably arranged in the telescopic component (1); The knot pusher (24) comprises a cylindrical sleeve (241) and a push rod (242), wherein the cylindrical sleeve (241) is disposed on the outside of the ligature (22) and is located at the rear end of the upper hanging knot (221), the front end of the push rod (242) is connected to the cylindrical sleeve (241), the rear end of the push rod (242) penetrates the positioning bolt (23), and the push rod (242) is used to push the cylindrical sleeve (241) to move the upper hanging knot (221) toward the front end to close the loop; The telescopic assembly (1) comprises an outer sleeve (11) and an inner sleeve (12), wherein the outer sleeve (11) is arranged to cover the outer side of the inner sleeve (12), and the inner sleeve (12) can slide along the outer sleeve (11), and the positioning bolt (23) is arranged at the front end of the inner sleeve (12); The cross-sectional shape of the outer sleeve (11) is U-shaped, the outer side of the inner sleeve (12) is provided with a slide groove (121), the inner side of the outer sleeve (11) is provided with a protrusion that matches the slide groove (121), and the outer sleeve (11) can slide parallel to the outer side of the inner sleeve (12); A first piston (243) is provided in the middle of the push rod (242); a first piston groove (244) is provided in the inner sleeve (12) outside the first piston (243) along the axial direction of the push rod (242); the first piston (243) is arranged in the first piston groove (244); a second piston (31) is provided at one end of the wire take-up rod (3) away from the ligature (22); the inner sleeve (12) is located outside the second piston (31) along the axial direction of the wire take-up rod (3) A second piston groove (32) is provided, the second piston (31) is provided in the second piston groove (32), the first piston groove (244) is connected to one end in the same direction as the second piston groove (32), when the knot pusher (24) pushes the upper knot (221) to move toward the front end, the first piston (243) moves forward in the first piston groove (244) and pushes the second piston (31) to move in the second piston groove (32), so that the wire take-up rod (3) pulls the rear end of the ligature wire (22) to move in the reverse direction; The rear end of the inner sleeve (12) is provided with a rear positioning bolt (25), the rear ends of the wire take-up rod (3) and the knot pusher (24) penetrate the rear positioning bolt (25), and the wire take-up rod (3) and the knot pusher (24) can slide along the rear positioning bolt (25); A handle (13) is provided at the bottom of the outer sleeve (11), a square through hole (111) is provided on the side of the outer sleeve (11), and a trigger (131) is provided on the handle (13) for clamping the inner sleeve (12) so that the inner sleeve (12) cannot slide in the outer sleeve (11).

2. The root tissue ligation device according to claim 1, characterized in that: A groove is vertically formed in the middle of the cylindrical sleeve (241), a blade (245) is arranged in the groove, and moving mechanisms (246) are arranged on both sides of the blade (245), and the moving mechanisms (246) are used to drive the blade (245) to move so as to cut the ligature (22).

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