Medical catheter

Abstract

The invention provides a medical catheter. The medical catheter comprises an inner layer and a spiral layer and a woven layer which are arranged outside the inner layer, the woven layer is of a net structure formed by crosswise weaving first silk threads, and the spiral layer is of a spiral structure formed by winding second silk threads in the axial direction. The medical catheter comprises at least two sections distributed in the axial direction. The included angle formed by the first silk threads and the second silk threads in at least one section is different from the included angle formed by the first silk threads and the second silk threads in other sections. According to the medical catheter, due to the fact that the included angle formed by the first silk threads and the second silk threads in at least one section is different from the included angle formed by the first silk threads and the second silk threads in other sections, the medical catheter has good flexibility, tensile strength and radial supporting force in the far-end section of the medical catheter. Stress sudden change of the far end and the near end can be prevented in the middle section of the medical catheter, high strength and good pushing performance are achieved in the near end section of the medical catheter, and therefore release and recovery of an endovascular intervention instrument are guaranteed.

Description

technical field [0001] The present invention relates to a medical catheter for the delivery of an endovascular interventional device during surgery, and more particularly to a medical catheter for the release and retrieval of an endovascular interventional device during cardiac surgery and / or aortic surgery . Background technique [0002] In cardiac surgery, when intracardiac surgery is performed, medical catheters are often used to deliver specific surgical instruments, such as endovascular interventional instruments. For example, when performing ultrasound-guided atrial septal defect closure, it is necessary to use a medical catheter to transport the fan into the heart. [0003] Traditional medical catheters use braids as reinforcing layers. Braids adjust the braiding angle by adjusting the braiding speed and wire rotation speed to prepare the reinforcing layer. However, the tensile strength and flexibility of the medical catheters obtained in this way cannot be balanced,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a medical catheter to solve the technical problems that the tensile strength and flexibility of the medical catheter cannot be balanced, the kink resistance is poor, and the radial support force is poor, thereby affecting the intervention of subsequent treatment instruments.

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