Medical device

By employing the average crystal grain size and bending angle design of nickel-titanium alloy in different regions of the guidewire, the problem of guidewire characteristic differences in different regions is solved, improving the selectivity and shaping effect of small branch vessels such as peripheral blood vessels.

CN122161641APending Publication Date: 2026-06-05ASAHI INTECC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ASAHI INTECC CO LTD
Filing Date
2023-11-09
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing guidewires have difficulty achieving characteristic differentiation in different regions, especially in terms of insufficient selectivity in small branch vessels such as peripheral vessels.

Method used

By employing nickel-titanium alloy with different average grain size and bending angle designs in different regions of the guidewire, the first and second regions of the guidewire are made to have different characteristics. Specifically, the first region is heat-treated to increase the grain size and bending angle, while the second region is not heat-treated to maintain a smaller grain size and bending angle.

Benefits of technology

This allows for the differentiation of guidewire characteristics in different regions, improving the selectivity and shaping effect of small branch vessels such as peripheral blood vessels.

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Abstract

A medical device has a first region having a first characteristic and a second region located at a base end side of the first region and having a second characteristic. For example, the medical device has a specific component located at the first region and the second region and including a nickel-titanium alloy. The first characteristic includes an average crystal grain diameter of the nickel-titanium alloy being a first size, and the second characteristic includes an average crystal grain diameter of the nickel-titanium alloy being a second size smaller than the first size.
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