Tether anchor

Abstract

The present invention belongs to the technical field of medical devices, and specifically relates to a tether fixing device. A tether fixing device comprises: a fixed base, the middle part of which can be passed through by a tether; a gathering component, which is detachably connected to the fixed base, the middle part of which can be passed through by a tether; after the tether passes through the fixed base and the gathering component in sequence, the tether is gathered and fixed by the gathering component, and when the tether needs to be adjusted, the gathering component is loosened, the tether is adjusted, and then the adjusted tether is gathered and fixed by the gathering component. The present invention is used for fixing the tether for artificial heart valves, and the tether can be gathered or loosened by the gathering component, and the length of the tether can be adjusted according to the patient's condition, and it is simple and convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a tether fixing device. Background Art

[0002] Normal heart valves are important structures that maintain the direction of blood flow in the heart. Valvular diseases such as stenosis and insufficiency will lead to changes in hemodynamics, causing a series of pathological and physiological changes, which can be life-threatening in severe cases. There are many causes of heart valve disease, which are related to genetics, immunity, infection, etc., which also makes heart valve disease one of the more common heart diseases. With the continuous advancement of science and technology, artificial heart valve replacement technology has become one of the main means and most effective ways to treat heart valve disease. This technology intervenes in the human body through a catheter and places an artificial heart valve at the lesion site of the human body, thereby achieving treatment of the disease.

[0003] In order to ensure that the valve can have a higher effectiveness after replacement, the accuracy of the fixed position of the valve stent in the heart is very high. Therefore, it is necessary to set a fixed structure to accurately define the position of the artificial valve. For example, when replacing the mitral valve, it is necessary to ensure that the replaced valve cannot be offset into the atrium under the impact of blood flow, causing device failure. At present, a tether is generally connected to the artificial valve stent, and the tether is led out to the outside of the apex and fixed. However, since the tether is relatively thin, if it is directly tied and fixed, the heart tissue will be damaged due to excessive tension during the subsequent continuous beating of the heart. In addition, direct knotting and fixing is also extremely inconvenient when the tether length needs to be adjusted a second time. Summary of the invention

[0004] The present invention aims to provide a tether fixing device to solve the technical problem that the tether connected to the artificial valve stent is inconvenient to fix and adjust.

[0005] A tether fixing device, comprising:

[0006] a fixed base, the middle of which can be passed through by a tether;

[0007] a cinching assembly, detachably connected to the fixed base, and a tether can pass through the middle part;

[0008] After the tether passes through the fixed base and the gathering assembly in sequence, the tether is gathered and fixed by the gathering assembly. When the tether needs to be adjusted, the gathering assembly is loosened, the tether is adjusted, and then the adjusted tether is gathered and fixed by the gathering assembly.

[0009] The fixed base comprises:

[0010] a base chassis, the middle portion of which can be passed through by a tether;

[0011] A biocompatible coating is wrapped around at least one side of the base chassis facing the heart.

[0012] At least one suture hole is provided on the periphery of the base chassis, and the base chassis is sutured and connected to the biocompatible covering membrane through the suture hole.

[0013] The biocompatible film is a biological film or a polymer material film or a combination thereof.

[0014] The biocompatible covering film is a medical elastic material, and the medical elastic material is one or more combined materials of medical rubber, medical sponge, medical suture film or medical bandage.

[0015] The bundling assembly comprises:

[0016] an elastic member, the middle portion of which can be passed through by a tether;

[0017] a tightening member, the middle part of which can be passed through by the tether and is connected with the elastic member;

[0018] When the constricting member is connected to the elastic member, the tether is constricted, and when the constricting member is removed from the elastic member, the tether is released.

[0019] The elastic member is a hollow cylindrical structure, and at least one groove is arranged on the outer circumferential surface of the elastic member. The groove connects the inside and outside of the elastic member, and the length direction of the groove is the axial direction of the elastic member. The elastic member and the tightening member are interference fit.

[0020] There are four grooves, and the four grooves are evenly arranged on the outer circumferential surface of the elastic member.

[0021] The cinching member is a cover of a hollow cylinder, one end of the cinching member is an open structure, and the other end is provided with a cinching through hole through which a tether can pass, and an internal thread is provided on the inner side surface of the cinching member;

[0022] An external thread is arranged on the outer circumferential surface of the elastic member, and the elastic member is threadedly connected to the tightening member.

[0023] The fixed base comprises:

[0024] A base ring with a hollow interior, the converging assembly is detachably connected to the base ring.

[0025] The tether fixing device also includes:

[0026] A limiting assembly limits a portion of the elastic member within the base ring to prevent the elastic member from moving.

[0027] The limiting component comprises:

[0028] A buckle, the middle part of which can be passed by a tether, is connected to the elastic member and assembled in the base ring.

[0029] At least one buckle step is provided inside the base ring;

[0030] At least one clamping groove is dug from the outside to the inside on the outer periphery of the clamping piece, and the clamping groove is clamped and matched with the clamping step.

[0031] A circle of limiting accommodating grooves is provided on the inner wall of the base ring;

[0032] The limiting component also includes:

[0033] A clamping ring has a bottom surface abutting against the upper surface of the buckle and an outer circumferential surface abutting against the limit accommodating groove.

[0034] The clamp ring is preferably a C-type clamp ring.

[0035] The positive and progressive effect of the present invention is that the present invention adopts a tether fixing device for fixing the tether of an artificial heart valve, the tether can be tightened or loosened by a tightening component, the length of the tether can be adjusted according to the patient's condition, and it is simple and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of an overall structure of the present invention;

[0037] Figure 2 for Figure 1 Exploded diagram of

[0038] Figure 3 for Figure 1 A cross-sectional view of

[0039] Figure 4 It is a schematic diagram of a state after the tether is tightened in the present invention. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0041] Reference Figures 1 to 3 A tether fixing device includes a fixing base 1, a tightening assembly 2, and may also include a limiting assembly 3. The tightening assembly 2 is detachably connected to the fixing base 1, and the tightening assembly 2 can be limited on the fixing base 1 by the limiting assembly 3.

[0042] A base through hole through which a tether can pass is provided in the middle of the fixed base 1. The fixed base 1 comprises a base chassis 11, a base ring 12 with a hollow interior, and a biocompatible coating. The base chassis 11 is a disc-shaped structure with two flat ends, on which a base ring 12 is integrally provided. The diameter of the base chassis 11 is larger than the outer diameter of the base ring 12, and a circle of tether receiving grooves 13 can be provided on the outer circumferential surface of the connection between the base chassis 11 and the base ring 12, so that the excess tether can be wound in the tether receiving groove 13.

[0043] A base through hole is provided in the middle of the base chassis 11 through which the tether can pass, and at least one suture hole 111 is provided around the base chassis 11. Figure 1 and Figure 2 As shown in , a plurality of suture holes 111 are arranged around the base chassis 11, and the plurality of suture holes 111 are evenly arranged in a circle. The biocompatible coating is wrapped at least on one side of the base chassis 11 facing the heart, and the side is the other side away from the base ring 12. The biocompatible coating is sutured and connected to the base chassis 11 through the suture holes 111. The biocompatible coating can be one or a combination of a biological membrane or a polymer material membrane. The biocompatible coating can also be a medical elastic material, which is a combination of one or more materials of medical rubber, medical sponge, medical suture film or medical bandage.

[0044] The base ring 12 is hollow inside, forming a base accommodating cavity that can accommodate part of the convergence component 2 and the limit component 3. At least one buckle step 121 is provided in the base ring 12, and the buckle steps 121 are preferably provided in three, and the three buckle steps 121 are evenly arranged on the inner wall of the base ring 12. A circle of limit accommodating grooves 122 are provided on the inner wall of the base ring 12, and the limit accommodating grooves 122 are located above the buckle steps 121.

[0045] The gathering component 2 is detachably connected to the fixed base 1, and a component through hole through which the tether can pass is provided in the middle of the gathering component 2. After the tether passes through the base through hole and the component through hole in sequence, the gathering component 2 gathers and fixes the tether. When the tether needs to be adjusted, the gathering component 2 is loosened, the tether is adjusted, and then the gathering component 2 gathers and fixes the adjusted tether.

[0046] The tying assembly 2 includes an elastic member 21 and a tying member 22. The elastic member 21 is connected to the tying member 22. The middle of the elastic member 21 and the tying member 22 can be passed by the tether. When the tying member 22 is connected to the elastic member 21, the tether is tyed, and when the tying member 22 is removed from the elastic member 21, the tether is loosened.

[0047] The elastic member 21 is a hollow cylindrical structure, and an elastic member through hole is provided in the middle of the elastic member 21. At least one slot 211 is provided on the outer circumferential surface of the elastic member 21, and the slot 211 connects the inside and outside of the elastic member 21, and the length direction of the slot 211 is the axial direction of the elastic member 21. Figure 2 As shown in FIG. 1 , the slots 211 are dug from top to bottom. There are four slots 211, and the four slots 211 are evenly arranged on the outer circumference of the elastic member 21. The outer circumference of the elastic member 21 is preferably provided with an external thread.

[0048] The cinching member 22 is preferably connected to the elastic member 21 by interference fit. The cinching member 22 is a cover of a hollow cylinder, one end of the cinching member 22 is an open structure, and the other end is provided with a cinching through hole through which the tether can pass, and the cinching through hole and the elastic member through hole together constitute the assembly through hole. The inner side surface of the cinching member 22 is provided with an internal thread, and the cinching member 22 is threadedly connected to the elastic member 21.

[0049] The limiting assembly 3 limits part of the elastic member 21 within the base ring 12 to prevent the elastic member 21 from moving. The limiting assembly 3 is assembled in the base ring 12. The limiting assembly 3 includes a snap member 31 and a snap ring 32. The middle part of the snap member 31 can be passed through by a tether, and the snap member 31 is fixedly connected to the bottom surface of the elastic member 21. Preferably, the snap member 31 and the elastic member 21 are made in one piece. At least one snap groove 311 is dug from the outside to the inside on the outer periphery of the snap member 31. The snap grooves 311 are preferably arranged in three, and the three snap grooves 311 are evenly arranged on the outer periphery of the snap member 31. The snap grooves 311 are snap-fitted and connected with the snap step 121. The snap ring 32 is preferably a C-shaped snap ring 32. The bottom surface of the snap ring 32 abuts against the upper surface of the snap member 31, and the outer circumferential surface of the snap ring 32 abuts against the limiting accommodating groove 122.

[0050] When the present invention is used, the limiting assembly 3 is used to limit the gathering assembly 2 within the base ring 12 of the fixed base 1. The gathering piece 22 is removed from the elastic piece 21, and the tether 4 passes through the base through hole and the assembly through hole in sequence, and then passes through the upper end of the elastic piece 21. After the tether 4 passes through the middle of the gathering piece 22, the gathering piece 22 is threadedly connected to the elastic piece 21. During the rotation of the gathering piece 22, the elastic piece 21 is gradually gathered, and the tether 4 is firmly gathered and stuck. Figure 4 , is a state diagram of the tether fixing device of the present invention after the tether is gathered, and the tether cannot be pulled at this time. When the tether 4 needs to be adjusted, the gathering piece 22 is turned out from the elastic piece 21 to loosen the tether 4 and adjust it. After the adjustment of the tether 4 is completed, the gathering piece 22 is threadedly connected to the elastic piece 21 to firmly gather and clamp the tether 4 again.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tether fixing device, characterized in that: include: a fixed base, the middle of which can be passed through by a tether; a cinching assembly, detachably connected to the fixed base, and a tether can pass through the middle part; After the tether passes through the fixed base and the tightening assembly in sequence, the tether is tightened and fixed by the tightening assembly. When the tether needs to be adjusted, the tightening assembly is loosened, the tether is adjusted, and then the adjusted tether is tightened and fixed by the tightening assembly. The bundling assembly comprises: an elastic member, the middle portion of which can be passed through by a tether; a tightening member, the middle part of which can be passed through by the tether and is connected with the elastic member; When the tightening member is connected to the elastic member, the tether is tightened, and when the tightening member is removed from the elastic member, the tether is loosened; The elastic member is a hollow cylindrical structure, and at least one slot is provided on the outer circumferential surface of the elastic member, the slot connects the inside and outside of the elastic member, and the length direction of the slot is the axial direction of the elastic member; The cinching member is a cover of a hollow cylinder, one end of the cinching member is an open structure, and the other end is provided with a cinching through hole through which a tether can pass, and an internal thread is provided on the inner side surface of the cinching member; An external thread is arranged on the outer circumferential surface of the elastic member, and the elastic member is threadedly connected to the tightening member.

2. The tether fixing device according to claim 1, characterized in that: The fixed base comprises: a base chassis, the middle portion of which can be passed through by a tether; A biocompatible coating is wrapped around at least one side of the base chassis facing the heart.

3. The tether fixing device according to claim 2, characterized in that: At least one suture hole is provided on the periphery of the base chassis, and the base chassis is sutured and connected to the biocompatible covering membrane through the suture hole; The biocompatible coating is one of biological membrane, polymer material membrane or medical elastic material or a combination thereof.

4. The tether fixing device according to claim 1, characterized in that: The fixed base comprises: A base ring with a hollow interior, the converging assembly being detachably connected to the base ring; The tether fixing device also includes: A limiting assembly limits a portion of the elastic member within the base ring to prevent the elastic member from moving.

5. The tether fixing device according to claim 4, characterized in that: The limiting component comprises: A buckle, the middle part of which can be passed by a tether, is connected to the elastic member and assembled in the base ring.

6. The tether fixing device according to claim 5, characterized in that: At least one buckle step is provided inside the base ring; At least one clamping groove is dug from the outside to the inside on the outer periphery of the clamping piece, and the clamping groove is clamped and matched with the clamping step.

7. The tether fixing device according to claim 5, characterized in that: A circle of limiting accommodating grooves is provided on the inner wall of the base ring; The limiting component also includes: A clamping ring has a bottom surface abutting against the upper surface of the buckle and an outer circumferential surface abutting against the limit accommodating groove.

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