Device for protecting cerebral vessels in cardiovascular surgery

Abstract

The invention discloses a device for protecting cerebral vessels in a cardiovascular surgery. The device comprises a catheter, a filter screen sleeved outside the catheter and a bending adjusting catheter, wherein the filter screen comprises a filter screen frame and a film layer wrapped outside the filter screen frame, microporous structures are arranged inside the film layer with a certain radian, the areas of the microporous structures are different, annular supporting wires and side supporting wires are arranged in the filter screen frame, and the interior of the bending adjusting catheter comprises a multi-layer composite catheter structure and a pre-shaping structure. According to the invention, the strength of the filter screen is improved, so that breakage can be avoided while the filter screen can be integrally developed so as to accurately judge whether the filter screen completely extends out of the catheter or not, the required force value can be reduced when the filter screen is recovered, breakage of the filter screen is avoided, and the three-dimensional bending effect of the bending adjusting catheter can be achieved by using a single drawing wire.

Description

technical field [0001] The invention relates to the field of surgical instruments, in particular to a device for protecting cerebrovascular in cardiovascular surgery. Background technique [0002] In cardiovascular procedures (such as transcatheter aortic valve implantation or replacement, transcatheter mitral valve implantation or repair, surgical aortic valve replacement, cardiac ablation procedures (radiofrequency, cryo, etc.), left atrial appendage closure, etc.), The medical device for protecting the cerebral blood vessels can filter and remove the thrombus and fallen calcified fragments generated during the operation. [0003] The existing publication number is that the device provided in the system and method for protecting cerebral blood vessels provided by CN 110831545 A has the following defects: [0004] 1. During the recycling process, the sides of the net bag will overlap and accumulate, resulting in a large recycling force, making it difficult to recycle, and ...

AI Technical Summary

Problems solved by technology

However, the collected embolic fragments and thrombi will accumulate in the center of the filter after being washed by the blood flow, which will affect the blood flow velocity and may affect the remote blood supply.

At the same time, too dense mesh will reduce the tensile strength of the filter and cause the filter to break

[0006] 3. In the existing technical scheme, only the part of the filter screen is developed under the radiation, and other parts cannot be developed under the radiation. During the process of placing the filter screen, it is impossible to accurately judge whether the filter screen is

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