Implanted instrument conveying system and connecting structure thereof

Abstract

The invention relates to an implanted instrument conveying system and a connecting structure thereof. The connecting structure comprises a first connecting piece and a second connecting piece which are in threaded fit with each other, the first connecting piece and the second connecting piece are connected with a pushing rod and an implanted instrument respectively, the connecting structure further comprises a guiding structure, the guiding structure comprises at least one cylindrical surface, and the guiding structure enables an external thread structure and a threaded hole to be coaxial with the center line of the cylindrical surface when the external thread structure and the threaded hole are matched. According to the implanted instrument conveying system and the connecting structure thereof, coaxial matching between the external thread structure and the threaded hole is maintained through the guiding structure, the external thread structure is prevented from deviating from the axis of the threaded hole, thread matching between the external thread structure and the threaded hole is more easily relieved, therefore, in the process that the implanted instrument conveying system of the connecting structure is used for carrying out releasing operation on the implanted instrument, compared with the connecting structure which is not provided with the guiding structure, the releasing operation is more convenient and faster, and the reliability is higher.

Description

technical field [0001] The invention relates to the technical field of interventional medicine, in particular to an implantation device delivery system and its connecting structure. Background technique [0002] Atrial fibrillation is the most common sustained arrhythmia, which has the risk of inducing ischemic stroke, so the prevention of atrial fibrillation is of great significance. Recent studies have shown that closure of the left atrial appendage can effectively prevent the risk of ischemic stroke caused by atrial fibrillation. [0003] The existing occluders used for left atrial appendage occlusion can basically be divided into two categories, one is the plug-type occluder represented by Watchman. The other type is a cap-type occluder represented by LAmbre. [0004] The thread structure is often used to connect and release the occluder and the push rod of the delivery system. However, during the release operation, it is difficult to ensure that the push rod and the ...

AI Technical Summary

Problems solved by technology

However, during the release operation, it is difficult to ensure that the push rod and the occluder remain in the same straight line. To be precise, when the delivery system transports the occluder to a suitable position, the push rod is generally in a curved state in the body. When the release operation is performed, the push rod tends to deflect the male thread to one side relative to the female thread, resulting in a large stress in the axial direction of the thread fit between the two. This situation will lead to the need to operate the push rod relative to the sealing The release operation can only be completed with a greater torque of the occluder, and there may even be a situation where the male thread and the female thread cannot be released due to excessive axial stress between the male thread and the female thread, which will easily further cause the push rod to be inappropriate to the occluder traction, which seriously affects the reliability of the release operation

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