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Valve annular constriction device

A valve annulus and tensioning sheet technology, applied in the field of medical devices, can solve the problems of many complications, high risks, and difficult healing, and achieve the effect of slowing down the heart decline and improving the therapeutic effect.

Pending Publication Date: 2020-07-31
KOKA NANTONG LIFESCIENCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surgical valve replacement or repair is still the first choice for patients with mitral regurgitation, but for patients with advanced age, history of open chest, poor heart function and multiple organ insufficiency, surgical trauma is large, healing is difficult, and complications are many , the risk is high, and even some patients cannot tolerate it

Method used

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  • Valve annular constriction device
  • Valve annular constriction device
  • Valve annular constriction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1-11 As shown, this embodiment provides a valve constriction device, including an anchor 100, a tightening wire 3, and a tightening knob 4. The anchor includes an anchor needle 1, a tension piece 2, and a limit pin 5; The fixed needle 1 includes a puncture head 11, a connecting rod 12, and a base 13, wherein the puncture head 11 is similar to a tapered tip for piercing into the inner wall 8 of the ventricle; the position of the connecting rod 12 near the puncture head 11 has a limit groove 121, 2 sets of tensioning pieces are inserted on the outside of the connecting rod 12 and clamped in the limit groove 121; the middle part of the base 13 is provided with a first tightening wire hole 131 for the tightening wire 3 to pass through; the bottom of the base is provided with The first connection hole 132 is detachably connected to the push rod of the delivery device 7 , wherein the detachable connection includes threaded connection and buckle connection.

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Embodiment 2

[0050] The valve constriction device provided in this embodiment is different from Embodiment 1 in that:

[0051] The anchor needle of this embodiment adopts a rotary structure, such as Figure 12-13 As shown, the material is memory alloy. The anchor needle is loaded in the delivery tube during delivery, and the two branches of the head end, the first head end 91a and the second head end 91b, are constrained to the axial direction by the delivery tube, and when they reach a predetermined position, the push rod is pushed to anchor the needle end The branches 91a and 91b are pierced into the target position, and the middle part of the anchor needle is rotated to form a pull ring 92, which can be used for the tightening thread 3 to pass through multiple anchor pieces for further tightening. After riveting is completed, the first head end 91a and the second head end 91b of the head branch return to the hook structure in the initial state: the first hook structure 93a and the seco...

Embodiment 3

[0054] The valve constriction device provided in this embodiment is different from Embodiment 1 in that:

[0055] The anchor in this embodiment adopts a helical structure, such as Figure 14 As shown, the head end is a needle point structure 101, the implanted part is a helical structure 102, and the connecting part is provided with a second tightening thread hole 103 for passing the tightening thread 3 so that all the anchoring devices are connected in series one by one. The end is provided with a second connection hole 104, which can be detachably connected with the push rod of the conveying device, and the connection methods include screw connection, slot connection, snap connection and the like. When the pushing rod is rotated after reaching the predetermined position, the anchoring device can be helically implanted into the human tissue, and the reverse rotation can realize the operation of long-distance detachment. After the anchoring device is implanted into human tiss...

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Abstract

The invention provides a valve annular constriction device. The valve annular constriction device comprises an anchoring part and a tightening line, and the anchoring part comprises an anchoring needle and a tensioning piece; the anchoring needle comprises a puncture head, a connecting rod and a base, and the puncture head is used for puncturing into the inner wall of a ventricle; the connecting rod is provided with a limiting groove, and the tensioning piece is inserted outside the connecting rod in a sleeving mode and connected into the limiting groove in a clamped mode; a tightening line hole is formed in the middle of the base and used for the tightening line to penetrate through; and a connecting hole detachably connected with a pushing rod of a conveying device is formed in the bottom of the base. According to the annular constriction, valve leaflets and a subvalvular structure of a mitral valve are reserved, a left ventricular structure is reserved to the maximum extent, and heart recession is relieved; and the treatment effect of mitral regurgitation is improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a valve annular constriction device. Background technique [0002] The mitral valve of the human heart has a very different structure from valves in other hearts. The mitral valve consists of an annulus with a ring-shaped structure formed in part by a pair of leaflets, chordae tendineae, papillary muscles, etc. The leaflets extend down from the annulus into the left ventricle, and the leaflets are connected to the papillary muscles by the chordae. There are anterior leaflets and posterior leaflets in the valve leaflet structure, and the side of the valve annulus is called the posterior leaflet. The normal anterior and posterior leaflets of the valve act together as a one-way valve, allowing blood to flow only from the left atrium to the left ventricle. The left atrium receives oxygenated blood from the pulmonary veins. When the left atrium contracts and the left ventric...

Claims

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Application Information

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IPC IPC(8): A61F2/24
CPCA61F2/246A61F2/2466A61F2210/0014
Inventor 张新页陈大凯
Owner KOKA NANTONG LIFESCIENCES CO LTD
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