Medical guide wire and conveying system

Abstract

The invention provides a medical guide wire and a conveying system. The medical guide wire comprises a reducing central spindle and a protective jacket. The reducing central spindle comprises a linear equal-diameter section, a streamline reducing section and a linear reducing section from the near end to the far end, wherein the diameter of the linear equal-diameter section, the diameter of the streamline reducing section and the diameter of the linear reducing section decrease in sequence. The protective jacket is arranged at least around the streamline reducing section and the linear reducing section of the reducing central spindle. The protective jacket further comprises a developing spring ring and a metal tube of a hollowed-out structure, the metal tube and / or the spring ring are / is coated with a high-molecular polymer coating, and the high-molecular polymer coating is coated with a hydrophilic coating. Compared with existing medical guide wires, the medical guide wire has excellent comprehensive performance.

Description

technical field [0001] The present invention generally relates to medical devices, and in particular to delivery devices for delivery and placement of implants (such as artificial valves, vascular stents). In particular, in a first aspect, the invention relates to a medical guidewire for a delivery device. In a second aspect, the invention relates to a delivery system comprising a medical guidewire. Background technique [0002] In interventional surgery, guide wires are used to guide medical catheters and other related instruments into blood vessels and make them reach the lesion. [0003] Medical guide wires are generally divided into delivery guide wires and guide wires, and these two types of guide wires are similar in structure. A medical guide wire generally includes three parts: a soft tip at the far end, a middle section, and a push rod section at the proximal end, and the middle section connects the soft tip and the push rod section. The medical guide wire can be...

AI Technical Summary

Problems solved by technology

Although the flexibility of the guide wire can be improved by improving the coating, the flexibility of the guide wire is still limited by the structure of the hypotube, and there is little room for improvement

[0010] The coil-like cutting design of the distal end of the Nitinol metal tube in US6004279 improves the flexibility of the guide wire, but reduces the visibility of the guide wire

Moreover, the proximal end of the metal tube does not have any improved design, so that the flexibility of the guide wire is also affected

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