Medical instrument and membrane suture method thereof

Abstract

The invention relates to a medical instrument and a membrane suture method thereof. The membrane suture method comprises the following steps: a stent is coated with a covering membrane; the middle of a suture line penetrates through the stent at least four times and penetrates through the covering membrane at least one time to form a suture line coil, and a first line knot is tied to the fixed end and the movable end of the suture line; and the movable end of the suture line is pulled to move along the first line knot, so that the suture line coil is locked after the length of the suture line coil is adjusted. According to the membrane suture method, a slipknot (namely a first line knot) and a hard knot (namely a second line knot) are combined to coat the stent with the covering membrane, so that the suture tightness of the covering membrane on the stent can be controlled, and the defect that the length of the suture line coil cannot be adjusted after the hard knot is tied can be overcome; and the middle of the suture line penetrates through the stent at least four times and penetrates through the covering film at least one time, so that inaccurate adjustment of the suture line coil caused by deformation of the medical instrument due to overlarge stress can be avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a medical device and a sew-membrane method thereof. Background technique [0002] Atrial fibrillation is the most common sustained arrhythmia, which has the risk of inducing stroke, so the prevention of atrial fibrillation is of great significance. Studies in recent years have shown that closure of the left atrial appendage can effectively prevent stroke events caused by atrial fibrillation. At present, the most commonly used LAA occluder in clinical practice is the inner-plug LAA occluder, in which the alloy stent of this type of occluder can be stretched in an umbrella shape and fixed at the mouth of the LAA by relying on the self-expandability of the alloy. The flow-blocking film of the occluder covers and completely wraps the outside of the alloy stent. After the metal stent is stretched, the film can completely block the mouth of the left atrial appendage, thus play...

AI Technical Summary

Problems solved by technology

[0004] The slit membrane method will affect the performance of the left atrial appendage occluder

If the closure film is sutured too tightly, the suture may break or the movement of the occluder may be hindered; if the suture is too loose, the suture cannot effectively tighten the film, and the occluder cannot effectively occlude the left atrial appendage, resulting in Residual leaks, or uneven folds on the surface of the occluded disc, resulting in device-related thrombus

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