Novel snare for interventional therapy of congenital heart diseases

Abstract

The invention discloses a novel snare for interventional therapy of congenital heart diseases. The novel snare comprises a snare ring, a nickel-titanium rod, a handle and a macromolecule heat shrinkable tube; the snare ring comprises a tail end extending along a direction vertical to a plane on which the snare ring is arranged; the tail end of the snare ring is fixedly connected with the bottom end of the nickel-titanium rod, and the nickel-titanium rod is vertical to the plane on which the snare ring is arranged; the snare ring is made of a nickel-titanium rope; the handle is fixed at the top end of the nickel-titanium rod; and the macromolecule heat shrinkable tube is compactly sleeved at the bottom of the nickel-titanium rod and the tail end of the snare ring. In the invention, the snare ring is made of the nickel-titanium rope formed by weaving a plurality of strands of nickel-titanium alloy wires, so that the snare ring has higher reliability compared with a snare ring made of a single strand of nickel-titanium alloy wire; meanwhile, the tip of the snare ring is softer so that unnecessary damage to the body of a human, particular to children, is not easy to produce.

Description

technical field [0001] The invention relates to a medical device, in particular to a novel snare for interventional treatment of congenital heart disease. Background technique [0002] The snare is often used in the interventional treatment of congenital heart disease. The snare can pass through a small lumen and restore the desired shape without being too sharp to damage the body tissue. [0003] The snare rings in the existing snares are mostly made of stainless steel. In order to ensure the reducibility, the material is generally hard. When the catheter is sent out, it is easy to puncture the tissue in the heart, resulting in unnecessary injury. [0004] Now there are snares on the market that use a snare ring made of a single nickel-titanium alloy wire wound with a gold-plated tungsten wire. Because the nickel-titanium alloy wire is soft, it is not easy to cause unnecessary damage to the patient, but because the single nickel-titanium alloy wire The deformation of the w...

AI Technical Summary

Problems solved by technology

[0003] The snare rings in the existing snares are mostly made of stainless steel. In order to ensure the reducibility, the material is generally hard. When the catheter is sent out, it is easy to puncture the tissue in the heart and cause unnecessary damage.

[0004] Now there are snares on the market that use a snare ring made of a single nickel-titanium alloy wire wound with a gold-plated tungsten wire. Because the nickel-titanium alloy wire is soft, it is not easy to cause unnecessary damage to the patient, but because the single nickel-titanium alloy wire The deformation of the wire is relatively large during processing, which may easily cause the nickel-titanium alloy wire to break, making the snare unusable

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