Left atrial appendage occluder

Abstract

The present invention discloses a left atrial appendage ligator in the technical field of medical equipment, which comprises a ligature and an operating handle, a support part fixedly connected to one end of the operating handle, a supply tube and a lock tube fixedly connected to the inner wall of the support part, a first slide groove formed in the inner wall of the supply tube, a first slide block slidably connected to the inner wall of the first slide groove, a supply push rod fixedly connected to the middle part of the first slide block, a first hook fixedly connected to one end of the supply push rod, and a return spring fixedly connected to one side of the first slide block. In this left atrial appendage ligator, a locking push rod, a ligature, a hanging knot and a support assembly are provided, and the ligature is pre-installed in the sleeve portion to form the hanging knot, thereby avoiding the need to tie the knot during surgery and allowing the knot to be tied simply by locking the hanging knot during surgery. The sleeve portion is used as a support member for passing the other end of the ligature to avoid automatic locking, and when the sleeve portion is released from the hanging knot, the hanging knot can be pulled and automatically locked, thereby shortening the surgical time and improving the surgical efficiency.

Description

[Technical field]

[0001] The present invention relates to the field of medical devices, and more particularly to a left atrial appendage ligator. [Background technology]

[0002] The left atrial appendage is a long, tubular blind cavity with an irregular shape, multiple bends, and a size roughly the same as a thumb, with an opening size of 10mm to 40mm. The left atrial appendage is rich in pectinate muscles and trabeculae, which makes blood flow prone to vortexes and slows down the flow rate, making it a common site for thrombosis.

[0003] Patients with atrial fibrillation (AF) are at a significantly increased risk of stroke. Research has shown that in 60% of patients with rheumatic heart disease, cardiogenic thrombosis associated with atrial fibrillation (AF) originates from the left atrial appendage (LAA), and 91% of strokes caused by non-valvular atrial fibrillation (AF) are caused by thrombus in the left atrial appendage. Therefore, removal of the LAA is helpful in reducing left atrial thrombosis and stroke events.

[0004] Since cardiac surgery to simultaneously remove or close the left atrial appendage is simple and easy to perform, many doctors insist that cardiac surgery should be performed on such patients while removing or closing the left atrial appendage; however, if only the left atrial appendage is removed or closed, the surgical trauma is too great and surgical operation is inappropriate; therefore, ligation has become the preferred treatment method; however, traditional ligators are inconvenient to tie automatically and require the addition of external instruments for operation, which results in a long operation time and affects the quality and efficiency of the operation; therefore, a left atrial appendage ligator is provided. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the problems of the prior art that the traditional ligator is inconvenient to automatically tie and needs to add external instruments for operation, which results in a long operation time and affects the quality and efficiency of the operation, the present invention provides a left atrial appendage ligator, and adopts the following technical solutions: [Means for solving the problem]

[0006] The left atrial appendage ligator includes a ligature and an operating handle, a support part fixedly connected to one end of the operating handle, a supply tube and a lock tube fixedly connected to an inner wall of the support part, a first slide groove formed in an inner wall of the supply tube, a first slide block slidably connected to an inner wall of the first slide groove, a supply push rod fixedly connected to a middle part of the first slide block, a first hook fixedly connected to one end of the supply push rod, a return spring fixedly connected to one side of the first slide block, and a second slide groove formed in an inner wall of the lock tube. a second slide block is slidably connected to the second slide groove, a second hook is fixedly connected to one end of the second slide block, and a locking push rod is fixedly connected to the other side of the second hook. A slide cavity is opened in an inner wall of the lock tube adjacent to the second slide groove, a support assembly is inserted into the slide cavity, and one end of the ligature is wound around a middle part of the ligature to form a hanging knot, and a tip of the ligature is surrounded to form a loop, and the loop is provided at one end of an outer wall of the support assembly.

[0007] According to the above technical solution, a supply tube and a lock tube are provided, and both the supply tube and the lock tube are detachable, so that an operator can easily remove the supply tube and the lock tube to replace different ligatures, thereby realizing reuse of the ligator.

[0008] Optionally, the supply tube includes a straight tube portion and a guide portion, one end of the guide portion is threadedly connected to the straight tube portion to facilitate an operator removing the supply tube and securing a ligature; and the locking tube includes a fixing portion and a detachable portion, one end of the detachable portion is threadedly connected to the fixing portion to facilitate an operator removing the locking tube and securing the other end of the ligature.

[0009] Optionally, the ligature has one end that passes through the guide portion tied to a surface of the first hook and one end that passes through the release portion tied to a surface of the second hook, making it easy to replace a different ligature for each use.

[0010] Optionally, the support assembly includes a support rod inserted into the slide cavity, one end of the support rod is fixedly connected to a sleeve portion, a guide hole for passing a ligature is formed in an intermediate portion of the sleeve portion, and a temporary accommodation groove suitable for the ligature is formed in an outer wall of the sleeve portion, and the temporary accommodation groove increases frictional force to prevent the ligature from automatically releasing and locking.

[0011] Optionally, the operating handle includes a fixed handle, a grip is rotatably connected to an inner wall of the fixed handle by a rotating shaft, and a push plate adapted to a push rod is provided on the upper part of the grip, and one end of the push rod is pressed against a side wall of the push plate, thereby realizing adjustment of the size of the loop made of the ligature.

[0012] Optionally, push buttons are fixedly connected to both one end of the support rod and one end of the locking push rod, a horizontal slide groove that fits the push button is formed on the upper surface of the fixed handle, and the push button is slidably connected to the inner wall of the horizontal slide groove, thereby making it easy to control the locking of the ligature and the release of the catheter portion and the ligature with the push button.

[0013] Optionally, a buffer spring is fixedly connected to the upper part of the inner wall of the fixed handle, and one end of the buffer spring is fixedly connected to one of the push buttons. After being locked, the buffer spring can push the push button to eject the hanging knot, which makes it easy for the operator to cut the ligature.

[0014] How to use the left atrial appendage ligator: Step 1, in which a ligature is pre-attached to a sleeve portion to form a suspension knot; Step 2: when the operator presses the grip, the ligature extends from the enclosed ligation loop, and the ligation loop expands until it can pass through the outer contour of the left atrial appendage, and the size of the ligation loop is set to 50-70 mm; Step 3: the operator uses a surgical instrument to lower the ligation loop past the outer contour of the left atrial appendage to a ligation position; Step 4: when it is determined that the ligation loop is in the ligation position, the operator slides a push button at one end of the support rod backward to move the sleeve part backward and release the ligature from the sleeve part, and at the same time slides a push button at one end of the locking push rod backward to move and lock the hanging knot, thereby realizing automatic tying; and step 5, which simply entails cutting the ligature at the tail of the suspension knot and removing the left atrial appendage ligator.

[0015] According to the above technical solution, when the operator presses the handle, i.e., compresses the grip, the grip pushes the supply push rod, which then pushes the first slide block to compress the return spring, so that the supply push rod extends and moves the movable end of the ligature to extend it. When the ligature extends, it slides into the sleeve, and the hanging knot is supported by the sleeve, which effectively prevents the hanging knot from automatically locking. The temporary accommodation groove is provided on the surface of the sleeve, which increases the friction force on the surface of the sleeve and improves the accommodation capacity of the ligature. After the ligation loop surrounded by the ligature expands, the operator can easily and quickly fit it into the left atrial appendage. The ligature can be automatically contracted by the return spring, and when it is necessary to lock the hanging knot, the push button on one end of the support rod is slid backward to move and retract the sleeve portion to release the ligature from the sleeve portion, and at the same time, the push button on one end of the locking push rod is slid backward to move and lock the hanging knot, thereby achieving automatic tying. Since the ligature is pre-installed in the sleeve portion to form the hanging knot, tying the knot during surgery is avoided, and tying the knot can be completed by simply locking the hanging knot during surgery, which shortens the surgery time and improves the surgery efficiency.

[0016] Optionally, the specific operation method for replacing the ligature is as follows: The operator removes the guide portion from the straight tube portion by using a screw, and at the same time removes the detachable portion from the fixed portion by using a screw, wraps the ligature around the first hook, ties it, and secures it, wraps the middle portion of the ligature around the first hook to form a hanging knot, hangs it on the sleeve portion, and passes the other end of the ligature through the hanging knot and ties it to the second hook, and secures it.

[0017] The above technical solution allows easy replacement of the ligature, allows multiple use of the left atrial appendage ligator, and avoids waste of the device.

[0018] The left atrial appendage ligator according to the present invention has the following beneficial effects: 1. The left atrial appendage ligator is provided with a supply tube and a locking tube, and both the supply tube and the locking tube are detachable, so that the operator can easily remove the supply tube and the locking tube to replace different ligatures, and the ligator can be reused.

[0019] 2. The left atrial appendage ligator is provided with an operating handle, a first slide block, a first slide groove, a supply push rod and a return spring. The first slide block is elastically engaged with the supply tube by the return spring, so that the return spring can be compressed by the operating handle to easily supply the ligature, and the ligation loop surrounded by the ligature can be expanded, so that the ligature can be easily automatically inserted into the left atrial appendage, and the return spring can automatically contract the ligature, making it easier to tie.

[0020] 3. The left atrial appendage ligator is provided with a locking push rod, a ligature, a hanging knot and a support assembly. The ligature is pre-installed in the sleeve for forming the hanging knot, which avoids the need to tie the knot during surgery. The knot can be tied by simply locking the hanging knot during surgery. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic diagram of a three-dimensional structure of the present invention. [Diagram 2] FIG. 2 is an exploded view of a partial structure of the present invention. [Diagram 3] FIG. 2 is an exploded view of a partial structure of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of a straight pipe section of the present invention. [Diagram 5] FIG. 2 is a cross-sectional view of the present invention.

[0022] In the drawings, there are shown 1 ligature, 101 hanging knot, 2 operating handle, 201 fixing handle, 202 grip, 3 supply tube, 301 straight tube section, 302 guide section, 4 lock tube, 401 fixing section, 402 removal section, 5 first slide groove, 6 first slide block, 7 first hook, 8 supply push rod, 9 return spring, 10 second slide block, 11 second hook, 12 lock push rod, 13 support rod, 14 sleeve section, 15 guide hole, 16 push button, 17 buffer spring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the drawings of the embodiments of the present invention, obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative efforts belong to the protection scope of the present invention.

[0024] Example 1 1 to 5, the present invention provides a technical solution, namely, a left atrial appendage ligator, which comprises a ligature 1 and an operating handle 2, a support part is fixedly connected to one end of the operating handle 2, a supply tube 3 and a lock tube 4 are fixedly connected to the inner wall of the support part, a first slide groove 5 is formed on the inner wall of the supply tube 3, a first slide block 6 is slidably connected to the inner wall of the first slide groove 5, a supply push rod 8 is fixedly connected to the middle part of the first slide block 6, a first hook 7 is fixedly connected to one end of the supply push rod 8, a return spring 9 is fixedly connected to one side of the first slide block 6, a second slide block 8 is fixed to the inner wall of the lock tube 4, and a second slide block 9 is fixed to the inner wall of the lock tube 4. A groove is opened, a second slide block 10 is slidably connected to the second slide groove, a second hook 11 is fixedly connected to one end of the second slide block 10, and a locking push rod 12 is fixedly connected to the other side of the second hook 11. A slide cavity is opened in the inner wall of the lock tube 4 adjacent to the second slide groove, a support assembly is inserted into the slide cavity, one end of the ligature 1 is wound around the middle part of the ligature 1 to form a hanging knot 101, and the tip of the ligature 1 is surrounded to form a loop, and the loop is provided at one end of the outer wall of the support assembly.

[0025] Here, the operating handle 2 includes a fixed handle 201, to the inner wall of which a grip 202 is rotatably connected via a rotating shaft, and a push plate that fits the supply push rod 8 is provided on the upper part of the grip 202, and one end of the supply push rod 8 is pressed against the side wall of the push plate, so that the push plate can push and move the supply push rod 8, making it easy to adjust the size of the loop made of the ligature 1.

[0026] In addition, push buttons 16 are fixedly connected to both one end of the support rod 13 and one end of the locking push rod 12. A horizontal slide groove that fits the push button 16 is formed on the upper surface of the fixed handle 201, and the push button 16 is slidably connected to the inner wall of the horizontal slide groove, making it easy to control the locking of the ligature 1 and the release of the catheter portion and the ligature 1 with the push button 16. A buffer spring 17 is fixedly connected to the upper part of the inner wall of the fixed handle 201, and one end of the buffer spring 17 is fixedly connected to one of the push buttons 16. After locking, the buffer spring 17 pushes and moves the push button 16 to eject the hanging knot 101, making it easy for the operator to cut the ligature 1.

[0027] Finally, the support assembly includes a support rod 13 inserted into the slide cavity, one end of the support rod 13 is fixedly connected to a sleeve portion 14, a guide hole 15 for passing the ligature 1 is formed in the middle of the sleeve portion 14, and a temporary storage groove suitable for the ligature 1 is formed in the outer wall of the sleeve portion 14, which increases the frictional force and prevents the ligature 1 from automatically releasing and locking.

[0028] How to use the left atrial appendage ligator: Step 1 in which the ligature 1 is pre-attached to the sleeve portion 14 to form the suspension knot 101; Step 2: when the operator presses the grip 202, the ligature 1 extends from the enclosed ligation loop, and the ligation loop expands until it can pass through the outer contour of the left atrial appendage, and the size of the ligation loop is set to 50-70 mm; Step 3: the operator uses a surgical instrument to lower the ligation loop past the outer contour of the left atrial appendage to a ligation position; Step 4: when it is determined that the ligation loop is in the ligation position, the operator slides the push button 16 at one end of the support rod 13 backward to move the sleeve portion 14 backward, and the ligature 1 is released from the sleeve portion 14, and at the same time, slides the push button 16 at one end of the locking push rod 12 backward to move and lock the hanging knot 101, thereby realizing automatic tying; and step 5, which simply requires cutting the ligature 1 at the tail of the hanging knot 101 and removing the left atrial appendage ligator.

[0029] In concrete use, when an operator presses the handle, i.e., compresses the grip 202, the grip 202 pushes the supply push rod 8, which in turn pushes the first slide block 6 to compress the return spring 9. The supply push rod 8 then extends to move the movable end of the ligature 1 to extend it. When the ligature 1 extends, it slides into the sleeve portion 14, and the hanging knot 101 is supported by the sleeve portion 14, effectively preventing the hanging knot 101 from automatically locking. A temporary accommodation groove is provided on the surface of the sleeve portion 14, which increases the frictional force on the surface of the sleeve portion 14 and improves the accommodation capacity of the ligature 1. After the ligation loop surrounded by the ligature 1 expands, the operator can easily and quickly fit it into the left atrial appendage. and the ligature 1 is automatically contracted by the return spring 9. When it is necessary to lock the hanging knot 101, the push button 16 at one end of the support rod 13 is slid backward to move the sleeve portion 14 backward, thereby releasing the ligature 1 from the sleeve portion 14, and at the same time, the push button 16 at one end of the locking push rod 12 is slid backward to move and lock the hanging knot 101, thereby achieving automatic tying. Since the ligature 1 is previously provided in the sleeve portion 14 to form the hanging knot 101, it is possible to avoid tying the knot during surgery, and the tying can be completed simply by locking the hanging knot 101 during surgery, thereby shortening the surgical time and improving the surgical efficiency.

[0030] Example 2 Referring to FIG. 2, FIG. 3, FIG. 4 and FIG. 5, in order to achieve the purpose of cost reduction and easy assembly by reuse, the supply tube and the lock tube pipe may be provided as a detachable structure, specifically, Supply tube 3 includes straight tube portion 301 and guide portion 302, and one end of guide portion 302 is screw-connected to straight tube portion 301, making it easy for an operator to remove supply tube 3 and fix ligature 1; lock tube 4 includes fixed portion 401 and detachable portion 402, and one end of detachable portion 402 is screw-connected to fixed portion 401, making it easy for an operator to remove lock tube 4 and fix the other end of ligature 1; Here, one end of the ligature 1 that passes through the guide portion 302 is tied to the surface of the first hook 7, and one end that passes through the detachment portion 402 is tied to the surface of the second hook 11, which makes it easy to replace a different ligature each time it is used. Specifically, when replacing ligature 1 during use, the operator removes guide portion 302 from straight tube portion 301 by screwing it, and at the same time removes detachable portion 402 from fixed portion 401 by screwing it. The operator then winds ligature 1 around first hook 7, ties it, and secures it, winds the middle portion of ligature 1 to form hanging knot 101, hangs it on sleeve portion 14, and inserts the other end of ligature 1 through hanging knot 101 and ties it to second hook 11, and secures it.

[0031] The above are only preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto, and those skilled in the art will understand that within the technical scope disclosed in the present invention, any equivalent replacement or modification made based on the technical solutions and inventive concepts of the present invention should be included in the scope of protection of the present invention. In the description of this specification, the terms "connect", "attach", "fix", "provide" and the like are understood in a broad sense, for example, "connect" may be a fixed connection, or may be indirectly performed through an intermediate component without affecting the relationship and technical effect between the members, and may be an integral connection or a partial connection, and as in this example, those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

Claims

1. A left atrial appendage ligator comprising: The device comprises a ligature (1) and an operating handle (2), a support part is fixedly connected to one end of the operating handle (2), a supply tube (3) and a lock tube (4) are fixedly connected to an inner wall of the support part, a first slide groove (5) is formed in the inner wall of the supply tube (3), a first slide block (6) is slidably connected to the inner wall of the first slide groove (5), a supply push rod (8) is fixedly connected to a middle part of the first slide block (6), a first hook (7) is fixedly connected to one end of the supply push rod (8), a return spring (9) is fixedly connected to one side of the first slide block (6), a second slide groove is formed in the inner wall of the lock tube (4), and the second slide groove is formed in the inner wall of the lock tube (4). a second slide block (10) is slidably connected to the slide groove, a second hook (11) is fixedly connected to one end of the second slide block (10), and a locking push rod (12) is fixedly connected to the other end of the second hook (11); a slide cavity is formed in the inner wall of the lock tube (4) adjacent to the second slide groove, a support assembly is inserted into the slide cavity, one end of the ligature (1) is wound around a middle part of the ligature (1) to form a hanging knot (101), and a tip of the ligature (1) is surrounded to form a loop, and the loop is provided at one end of the outer wall of the support assembly.

2. 2. The left atrial appendage ligator of claim 1, wherein the supply tube (3) includes a straight tube portion (301) and a guide portion (302), one end of the guide portion (302) is threadedly connected to the straight tube portion (301), and the lock tube (4) includes a fixed portion (401) and a detachable portion (402), one end of the detachable portion (402) is threadedly connected to the fixed portion (401).

3. The left atrial appendage ligation device according to claim 2, characterized in that one end of the ligature (1) that passes through the guide portion (302) is tied to a surface of the first hook (7), and one end of the ligature (1) that passes through the detachment portion (402) is tied to a surface of the second hook (11).

4. 2. The left atrial appendage ligator of claim 1, wherein the support assembly includes a support rod (13) inserted into the slide cavity, a sleeve portion (14) fixedly connected to one end of the support rod (13), a guide hole (15) for passing the ligature (1) provided in the middle portion of the sleeve portion (14), and a temporary storage groove adapted to the ligature (1) provided in the outer wall of the sleeve portion (14).

5. 5. The left atrial appendage ligator of claim 4, wherein the operating handle (2) includes a fixed handle (201), a grip (202) is rotatably connected to the inner wall of the fixed handle (201) via a rotation axis, a push plate adapted to the supply push rod (8) is provided on the upper part of the grip (202), and one end of the supply push rod (8) is pressed against a side wall of the push plate.

6. 6. The left atrial appendage ligator of claim 5, wherein a push button (16) is fixedly connected to both one end of the support rod (13) and one end of the locking push rod (12), a horizontal slide groove that fits the push button (16) is formed on the upper surface of the fixed handle (201), and the push button (16) is slidably connected to the inner wall of the horizontal slide groove.

7. 7. The left atrial appendage ligator of claim 6, wherein a buffer spring (17) is fixedly connected to an upper portion of the inner wall of the fixed handle (201), and one end of the buffer spring (17) is fixedly connected to one of the push buttons (16) therein.

8. A method for using the left atrial appendage ligator according to any one of claims 1 to 7, comprising: Step 1, in which a ligature (1) is pre-attached to a sleeve portion to form a hanging knot (101); Step 2, when the operator presses the grip (202), the ligature (1) extends from the enclosed ligation loop, and the ligation loop expands until it can pass through the outer contour of the left atrial appendage, and the size of the ligation loop is set to 50-70 mm; Step 3: the operator uses a surgical instrument to lower the ligation loop past the outer contour of the left atrial appendage to the ligation position; Step 4: when it is determined that the ligation loop is in the ligation position, the operator slides the push button at one end of the support rod (13) backward to move the sleeve portion (14) backward, thereby releasing the ligature (1) from the sleeve portion (14), and at the same time slides the push button (16) at one end of the locking push rod (12) backward to move and lock the hanging knot (101), thereby realizing automatic tying; and step 5, which simply involves cutting the ligature (1) at the tail of the hanging knot (101) and removing the left atrial appendage ligator.

9. The specific operation method for replacing the ligature is as follows:

9. A method for using the left atrial appendage ligator according to claim 8, characterized in that an operator removes the guide portion (302) from the straight tube portion (301) by using a screw, and at the same time removes the detachable portion (402) from the fixed portion (401) by using a screw, winds the ligature (1) around the first hook (7), ties it, and secures it, winds the middle portion of the ligature (1) to form a suspension knot (101), hangs it on the sleeve portion (14), and passes the other end of the ligature (1) through the suspension knot (101), ties it to the second hook (11), and secures it.

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