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Cardiac valve tying rope and cardiac valve component comprising the same

A technology of heart valves and tethers, applied in the field of medical devices, can solve problems that affect heart recovery and are no longer applicable, and achieve the effects of reducing time, complexity, and dependence

Active Publication Date: 2020-05-08
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. Patients with moderate to severe reflux disease are often accompanied by problems such as ventricle enlargement and heart enlargement. When the prosthetic heart valve is implanted, the reflux disappears. At this time, the heart does not need to pump the original volume of blood, and the space of the ventricle gradually expands. Reduce and return to normal size. At this time, the original length and original tension value of the tether will no longer be suitable for the reduced ventricle, and even affect the recovery of the heart.

Method used

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  • Cardiac valve tying rope and cardiac valve component comprising the same
  • Cardiac valve tying rope and cardiac valve component comprising the same
  • Cardiac valve tying rope and cardiac valve component comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, one end of the heart valve tether 30 is connected to the heart valve 20 implanted in the heart 10, and the other end of the heart valve tether 30 is fixed to the apical spacer 40 outside the heart 10. At least part of the heart valve tether has Elasticity, so that the length of the heart valve tether 30 can be adjusted according to the force value of the heart valve tether 30 . In the illustrated embodiment, the heart valve tether 30 is provided with a helical segment 31 extending along the axial direction of the heart valve tether 30, the helical segment 31 itself has a shape memory function, figure 2 It shows a schematic diagram of the local structure of the heart valve tether 30 in a normal state, image 3 It shows a schematic diagram of the local structure of the heart valve tether 30 in a stretched state. When the two ends of the heart valve tether 30 have tension, the length of the helical segment 31 becomes longer, as figure 2 As shown...

Embodiment 2

[0039] like Figure 8 As shown, the heart valve tether 30 is provided with two ends interlaced to form a bending circle 32, and the heart valve tether 30 can be provided with a bending circle 32 or a plurality of bending circles 32, and the bending surface formed by the bending circle 32 Parallel to or coincident with the axis of the heart valve tether 30, that is, the winding direction of the bending circle 32 is towards the apex of the heart valve 20 and the ventricle LV respectively, and the plane where the bending circle 32 is located is perpendicular to the apical spacer 40 at the apex position, Such a heart valve tether 30 enables the bending ring to withstand the tension on both ends of the heart valve tether 30 , and the bending ring evenly bears the contraction force of the heart 10 so that the overall deformation of the heart valve tether 30 is reduced.

[0040] Figure 9 It is a schematic diagram of the local structure of the heart valve tether 30 in a normal state...

Embodiment 3

[0044] The heart valve tether 30 is made of metal stainless steel, nickel-titanium or metal material with good biocompatibility, or is made of non-metal material with high modulus of elasticity, or is made of absorbable material.

[0045] like Figure 11 As shown, the heart valve tether 30 itself is a spring-like structure or a section of spring-like structure is set on the heart valve tether 30. The wire diameter of the spring-like structure ranges from 0.1 mm to 1 mm, and the outer diameter of the spring-like structure ranges from 0.3 mm-5mm, when the heart 10 contracts, the heart valve 20 moves distally relative to the fixed end of the heart apex, so that every part on the heart valve tether 30 is in a stretched state; when the heart 10 relaxes, the spring Constrained by the structural properties of the shape, the heart valve tether 30 returns to its implanted state.

[0046] The difference between this embodiment and the first embodiment is that there is a larger distance...

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Abstract

The invention discloses a cardiac valve tying rope and a cardiac valve component comprising the same. One end of the cardiac valve tying rope is connected with a cardiac valve implanted in the heart,and the other end of the cardiac valve tying rope is fixed out of the heart; and at least parts of the cardiac valve tying rope are elastic to enable the cardiac valve tying rope to carry out length regulation along with a stress value of the cardiac valve tying rope. The above cardiac valve tying rope can be connected by being adaptive to elasticity required by heart beating, the tying rope can apply fixed tension to the cardiac valve according to the change of an own length so as to prevent the cardiac valve from falling into atriums, meanwhile, the cardiac valve tying rope can be suitable for different tensions in a heart beating process, and a situation that the heart is injured since the tension is overlarge can be avoided.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a heart valve tether and a heart valve assembly with the same. Background technique [0002] Some known prosthetic heart valves (eg, prosthetic mitral valves) include one or more tethers that extend from the valve to the exterior of the heart and are secured to the heart's outer ventricular wall with epicardial anchors. Through the binding force of the tether, the valve will not be squeezed into the atrium during systole, thereby reducing the risk of blood backflow from the mitral valve into the atrium. [0003] The tether is under tension in the heart, and the tension of the tether is measured by an adjustable force-measuring mechanism to fix the tether at the apex fixation device. In order to ensure that the tension between the prosthetic heart valve and the apex fixation device is maintained at a stable value, a force-measuring handle is used to measure the tension of the tethe...

Claims

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Application Information

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IPC IPC(8): A61F2/24
CPCA61F2/24
Inventor 姚斌
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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