Ligation tool for varicosity

Abstract

The invention discloses a ligation tool for varicosity, which relates to the technical field of medical instruments, is used for winding a ligature on a vein trunk, and comprises an outer catheter, at least one puncture tube is arranged in the outer catheter, the puncture tube positioned on the innermost side is used for penetrating the ligature, and a connecting piece is arranged at the head end of the puncture tube on the innermost side; the connecting piece is used for fixing one end of the ligature, and in the initial state, the puncture tube is located in the outer catheter; in the operation state, the puncture tube is pushed to move in the circumferential direction of the vein trunk, after the connecting piece is connected with the outer catheter, the other end of the ligature is located on the outer side of the near end of the puncture tube, the outer catheter is fixed, the puncture tube is pulled towards the near end, and the front end of the puncture tube is separated from the connecting piece. After varicosity treatment, the closing effect is achieved, redundant parts of a ligature are cut off, the ligation operation is completed, a tortuous vein trunk does not need to be pulled out through a stripper, the operation is simpler, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a varicose vein ligation tool. BACKGROUND

[0002] Varicose veins are a common vascular disease, mainly due to incompetence of the venous valve, weakness of the venous wall or long-term elevated venous pressure, leading to obstruction of venous blood return, blood stasis, and further causing venous dilation, tortuosity and deformation.

[0003] The general treatment plan is divided into stages, and the treatment principle of varicose veins is "controlling disease progression, relieving symptoms, and preventing complications". The corresponding scheme needs to be selected according to the severity of the disease (CEAP classification), and there is no drug that can completely reverse the dilated veins. Drugs are only used to assist in relieving symptoms.

[0004] Among them, in the traditional surgical treatment, the root of the great saphenous vein is ligated (to prevent blood from flowing backward), and the tortuous main vein is extracted through a stripper, completely removing the diseased vein, but the trauma is large, and postoperative incision scars will be left, and the recovery time is longer.

[0005] The prior art discloses a varicose vein ligation tool. In the operating space, the movable catheter adjusts the end of the catheter to ligate the ligation structure on the main vein. The technical scheme of the present application effectively solves the problem of inaccurate closure effect of the main vein after treatment in the related art, but during surgery, the doctor needs to operate and sequentially insert multiple catheters, and the multiple catheters need to cooperate with each other, greatly increasing the difficulty of surgery. The present application provides a varicose vein ligation tool to solve the problems raised in the background art. SUMMARY

[0006] To solve the above technical problems, the present application provides a varicose vein ligation tool for winding a ligation line around a main vein, comprising an outer catheter, at least one puncture tube is built in the outer catheter, the innermost puncture tube is used for penetrating the ligation line, and a connecting piece is arranged at the head end of the innermost puncture tube. The connecting piece is used for fixing one end of the ligation line.

[0007] Preferably, in the initial state, the puncture tubes are located inside the outer catheter; in the surgical state, the puncture tubes are pushed to move along the circumferential direction of the main vein, when the connecting piece is connected with the outer catheter, the other end of the ligation line is located outside the proximal end of the puncture tube, the outer catheter is fixed and the puncture tube is pulled towards the proximal end, and the front end of the puncture tube is separated from the connecting piece.

[0008] Preferably, the outer catheter comprises a straight section at the rear end and a curved section at the front end, and the outer catheter is provided with an annular groove near the curved section, and the annular groove is arranged on the outer wall of the outer catheter.

[0009] Preferably, the annular groove is in the form of an annular groove structure, and the two side ends of the annular groove are provided with clamping grooves.

[0010] Preferably, one side wall of the connecting piece is provided with a protrusion, and the protrusion is used for being inserted into the pipe hole of the puncture pipe.

[0011] Preferably, the outer circumferential side wall of the connecting piece is provided with a positioning piece, and when the connecting piece is inserted into the annular groove, the positioning piece is inserted into the inner side of the clamping groove.

[0012] Preferably, one end of the ligature is connected with the connecting piece, and the other end of the ligature is located outside the puncture pipe.

[0013] Preferably, the width of the annular groove is slightly greater than the width of the connecting piece, so that the connecting piece can be inserted into the annular groove.

[0014] Preferably, the puncture pipe is made of a memory alloy.

[0015] Preferably, the length of the puncture pipe is greater than the length of the outer catheter.

[0016] Technical effects and advantages of the present application: 1. In the present application, the knot of the ligature can tighten the main vein, and the treatment of varicose veins has a closing effect. After cutting off the excess part of the ligature, the ligation operation is completed, and the tortuous main vein does not need to be pulled out through the stripper. The operation is simpler and more convenient to operate.

[0017] 2. In the present application, during minimally invasive surgery, the ligature can be wound around the main vein by only one puncture. Compared with the existing ligation operation, multiple puncture catheters are needed to puncture the skin multiple times. On the one hand, it can reduce the trauma to the skin, and on the other hand, it can reduce the steps of the operation, reduce the difficulty of the operation, and reduce the operation time. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure schematic diagram of a varicose vein ligation tool provided by the embodiment of the present application; Figure 2 is a structure schematic diagram of a puncture pipe in a ligation tool in a puncture pipe out state provided by the embodiment of the present application; Figure 3 is a structure schematic diagram of a connecting piece and a clamping groove in a ligation tool provided by the embodiment of the present application; Figure 4 is a structure schematic diagram of a ligation tool when the puncture pipe is taken out provided by the embodiment of the present application; Figure 5is a structural schematic diagram of the external catheter in the ligation tool provided by the embodiment of the present application when the external catheter is taken out; Figure 6 is a structural schematic diagram of the internal structure of the external catheter in the ligation tool provided by the embodiment of the present application; Figure 7 is a structural schematic diagram of the external catheter in the ligation tool provided by the embodiment of the present application; Figure 3 is an enlarged structural schematic diagram of A in the middle.

[0019] In the figure: 1, main vein; 2, external catheter; 21, straight section; 22, curved section; 23, annular groove; 24, clamping groove; 3, first puncture tube; 31, first puncture section; 4, second puncture tube; 41, second puncture section; 5, third puncture tube; 51, third puncture section; 6, connecting piece; 61, protrusion; 62, positioning piece; 7, ligation line. DETAILED DESCRIPTION

[0020] The present application will be further described below in conjunction with the drawings and specific embodiments. The embodiments of the present application are given for the purpose of illustration and description, and are not exhaustive or limit the present application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present application and its practical application, and to enable those of ordinary skill in the art to understand the present application in order to design various embodiments with various modifications for specific use.

[0021] Please refer to Figure 1 In the embodiment shown, a ligation tool for varicose veins is provided, which is used to wrap a ligation line 7 around a main vein 1, and includes an external catheter 2. The external catheter 2 is internally provided with at least one puncture tube made of a memory alloy. The innermost puncture tube is used to penetrate the ligation line 7, and the head end of the innermost puncture tube is provided with a connecting piece for fixing one end of the ligation line 7. In the initial state, the puncture tubes are all located inside the external catheter 2. The external catheter 2 penetrates the skin to the edge of the main vein 1. In the surgical state, the puncture tubes are pushed to move along the circumferential direction of the main vein 1. When the connecting piece is connected with the external catheter 2, the other end of the ligation line 7 is located outside the proximal end of the puncture tube. The external catheter 2 is fixed and the puncture tube is pulled proximally. The head end of the puncture tube is separated from the connecting piece and enters the external catheter 2 again. The external catheter 2 and the puncture tube are withdrawn. The ligation line 7 is wrapped around the main vein 1. The ligation line 7 is knotted to tighten the main vein 1. After varicose vein treatment, the ligation line 7 has a closing effect. The excess part of the ligation line 7 is cut off, and the ligation operation is completed. The tortuous main vein does not need to be extracted through a stripper. The operation is simpler and more convenient to operate.

[0022] Through the ligation tool, during the minimally invasive surgery, the ligation thread 7 can be wound around the main vein 1 through only one puncture, compared with the existing ligation surgery which needs multiple puncture catheters to puncture the skin multiple times, on the one hand, the trauma to the skin can be reduced, on the other hand, the steps of the surgery can be reduced, the difficulty of the surgery can be reduced, and the surgery time can be reduced.

[0023] In an embodiment, the ligation thread 7 can be fixed with the connecting piece by adhesion, and a protrusion can be further arranged on the connecting piece to fix the ligation thread 7 on the protrusion, so as to fix the ligation thread 7 with the connecting piece, one end of the ligation thread is connected with the connecting piece, and the other end of the ligation thread is located outside the puncture tube.

[0024] Further, a side wall of the connecting piece is provided with a protrusion, and the protrusion is used for inserting into the tube hole of the puncture tube.

[0025] In the embodiment, the length of the puncture tube is greater than the length of the outer catheter 2, and the proximal end of the puncture tube is always located outside the outer catheter 2, so that the doctor can operate the puncture tube to advance and retreat from the rear end of the puncture tube.

[0026] Referring to Figures 2-6 In the specific embodiment, the outer catheter 2 includes a straight section 21 at the rear end and a curved section 22 at the front end, and during the minimally invasive surgery, the doctor operates the straight section 21 to puncture the skin with the curved section 22.

[0027] Further, the outer catheter 2 is provided with an annular groove 23 near the curved section 22, the annular groove 23 is arranged on the outer wall of the outer catheter 2, and the annular groove 23 is in the form of a ring-shaped groove structure.

[0028] In the embodiment, the number of the puncture tubes is taken as three, which are a first puncture tube 3, a second puncture tube 4 and a third puncture tube 5.

[0029] The first puncture tube 3 is arranged in the outer catheter 2 and can move along the axial direction of the outer catheter 2, and the length of the first puncture tube 3 is greater than the length of the outer catheter 2.

[0030] It can be understood that when the front end of the first puncture tube 3 is located inside or outside the front end of the outer catheter 2, the proximal end of the first puncture tube 3 is always located outside the proximal end of the outer catheter 2, so as to facilitate the doctor to operate the proximal end of the first puncture tube 3 to move along the axial direction of the outer catheter 2.

[0031] Further, the front end of the first puncture tube 3 is provided with a first puncture section 31, and the first puncture section 31 is in the form of an arc, and the front end of the first puncture tube 3 is provided with a sharp end to facilitate the first puncture tube 3 to penetrate into the skin tissue.

[0032] In the embodiment, the first puncture tube 3 is made of memory alloy, when the first puncture section 31 is located inside the outer catheter 2, the first puncture section 31 is adapted to the shape of the outer catheter 2, when the first puncture section 31 moves to the outside of the outer catheter 2, the first puncture section 31 is in circular arc shape, and the circular arc-shaped first puncture section 31 is wound outside the vein trunk 1.

[0033] The first puncture tube 3 is provided with the second puncture tube 4, the second puncture tube 4 is movable along the axial direction of the first puncture tube 3, and the length of the second puncture tube 4 is greater than that of the first puncture tube 3.

[0034] It can be understood that when the front end of the second puncture tube 4 is located inside or outside the front end of the first puncture tube 3, the proximal end of the second puncture tube 4 is always located outside the proximal end of the first puncture tube 3, so as to facilitate the doctor to move the proximal end of the second puncture tube 4 along the axial direction of the first puncture tube 3.

[0035] Further, the front end of the second puncture tube 4 is provided with a second puncture section 41, the second puncture section 41 is in arc shape, and the front end of the second puncture section 41 is provided with a sharp end, so as to facilitate the second puncture section 41 to penetrate into the skin tissue.

[0036] In the embodiment, the second puncture tube 4 is made of memory alloy, when the second puncture section 41 is located inside the first puncture tube 3, the second puncture section 41 is adapted to the shape of the first puncture tube 3, when the second puncture section 41 moves to the outside of the first puncture section 31, the second puncture section 41 is in circular arc shape, and the circular arc-shaped second puncture section 41 is wound outside the vein trunk 1.

[0037] The inside of the second puncture tube 4 is provided with the third puncture tube 5, the third puncture tube 5 is movable along the axial direction of the second puncture tube 4, and the length of the third puncture tube 5 is greater than that of the second puncture tube 4.

[0038] It can be understood that when the front end of the third puncture tube 5 is located inside or outside the front end of the second puncture tube 4, the proximal end of the third puncture tube 5 is always located outside the proximal end of the second puncture tube 4, so as to facilitate the doctor to move the proximal end of the third puncture tube 5 along the axial direction of the second puncture tube 4.

[0039] Further, the front end of the third puncture tube 5 is provided with a third puncture section 51, the third puncture section 51 is in arc shape, and the front end of the third puncture section 51 is provided with a sharp end, so as to facilitate the third puncture section 51 to penetrate into the skin tissue.

[0040] In the embodiment, the third puncture tube 5 is made of memory alloy, when the third puncture section 51 is located inside the second puncture tube 4, the third puncture section 51 is adapted to the shape of the second puncture tube 4, when the third puncture tube 51 moves to the outside of the second puncture section 41, the third puncture section 51 is in circular arc shape, and the circular arc-shaped third puncture section 51 is wound outside the vein trunk 1.

[0041] In the embodiment, the front end of the third puncture tube 5 is connected with a connecting piece 6, the connecting piece 6 is used to be connected with the annular groove 23, the doctor operates the rear end of the third puncture tube 5, after the front end of the third puncture tube 5 is pulled out from the second puncture tube 4, the connecting piece 6 is inserted into the annular groove 23.

[0042] It can be understood that the number of the puncture tubes can be adjusted according to actual needs, which is not limited to three in the embodiment, and can also be one, two, four or five, etc.

[0043] Referring to Figure 7 In the embodiment, the width of the annular groove 23 is slightly larger than the width of the connecting piece 6, so that the connecting piece 6 can be inserted into the annular groove 23, and the two side ends of the annular groove 23 are provided with clamping grooves 24, the outer side wall of the clamping groove 24 is arc-shaped, which facilitates the connecting piece 6 to enter the annular groove 23.

[0044] It should be understood that the position of the annular groove 23 is determined according to the position where the thinnest puncture tube is in contact with the outer catheter 2, and the connecting piece 6 can be inserted into the annular groove 23, which can be adjusted according to actual conditions, and can be obtained by simple experimental means, which will not be described here.

[0045] Further, one side wall of the connecting piece 6 is provided with a protrusion 61, the protrusion 61 is used to be inserted into the tube hole of the third puncture tube 5, so as to avoid the displacement of the connecting piece 6 along the axial direction when the third puncture tube 5 moves in the circumferential direction.

[0046] Further, the outer circumferential side wall of the connecting piece 6 is provided with a positioning piece 62, the positioning piece 62 is a flexible sheet structure, when the connecting piece 6 is inserted into the annular groove 23, the positioning piece 62 is inserted into the inner side of the clamping groove 24, and the clamping groove 24 limits the positioning piece 62, at this time, the ligature wire 7 is annular, one end of the ligature wire 7 is connected with the connecting piece 6, and the other end of the ligature wire 7 is located outside the third puncture tube 5.

[0047] When the doctor pulls the third puncture tube 5 to move backward from the rear end, the clamping groove 24 limits the positioning piece 62, so that the connecting piece 6 is separated from the third puncture tube 5, the third puncture tube 5 is pulled into the second puncture tube 4, the second puncture tube 4 is pulled into the first puncture tube 3, the first puncture tube 3 is pulled into the outer catheter 2, the outer catheter 2 is taken out, the connecting piece 6 is taken out synchronously with the outer catheter 2, the ligature wire 7 is wound outside the main vein 1, after the ligature wire 7 is knotted, the excess part of the ligature wire 7 is cut off, and the ligation operation is completed.

[0048] Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, if not specifically described and limited.

Claims

1. A ligation tool for varicose veins, characterized in that, The device is used to wrap a ligation suture around a main vein. It includes an external catheter with at least one puncture tube inside. The innermost puncture tube is used to insert the ligation suture, and the tip of the innermost puncture tube is provided with a connector for fixing one end of the ligation suture.

2. The ligation tool for varicose veins according to claim 1, characterized in that, In the initial state, the puncture tube is located inside the external catheter. In the surgical state, the puncture tube is pushed along the circumference of the main vein. After the connector is connected to the external catheter, the other end of the ligation suture is located outside the proximal end of the puncture tube. The external catheter is fixed and the puncture tube is pulled proximally, and the front end of the puncture tube separates from the connector.

3. The ligation tool for varicose veins according to claim 1, characterized in that, The external conduit includes a straight section at the rear end and a curved section at the front end. An annular groove is provided near the curved section of the external conduit, and the annular groove is located on the outer wall of the external conduit.

4. The ligation tool for varicose veins according to claim 3, characterized in that, The annular groove has an annular groove structure, and snap-fit ​​grooves are provided at both ends of the annular groove.

5. The ligation tool for varicose veins according to claim 1, characterized in that, The connector has a protrusion on one side wall, which is used to insert into the hole of the puncture tube.

6. The ligation tool for varicose veins according to claim 5, characterized in that, The connector is provided with a positioning element on its outer peripheral sidewall. When the connector is inserted into the annular groove, the positioning element is inserted into the inner side of the snap-fit ​​groove.

7. The ligation tool for varicose veins according to claim 1, characterized in that, One end of the ligation suture is connected to the connector, and the other end of the ligation suture is located outside the puncture tube.

8. A ligation tool for varicose veins according to claim 4, characterized in that, The width of the annular groove is slightly larger than the width of the connector, so that the connector can be inserted into the annular groove.

9. A ligation tool for varicose veins according to claim 1, characterized in that, The puncture tube is made of shape memory alloy.

10. A ligation tool for varicose veins according to claim 9, characterized in that, The length of the puncture tube is greater than the length of the external catheter.

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