Medical pt alloy and medical member formed from medical pt alloy
A high-Pt alloy with Ti, Zr, Nb, Mo, or Ta additives addresses mechanical and biocompatibility issues, enhancing medical device performance through precipitation strengthening and X-ray visibility.
WO2026140707A1PCT designated stage Publication Date: 2026-07-02TANAKA PRECIOUS METAL TECHNOLOGIES CO LTD +1
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Patent Information
- Application Number
- PCT/JP2025/041908
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-12-25
- Filing Date
- 2025-12-02
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Existing medical-grade Pt alloys lack sufficient mechanical properties, X-ray visibility, and biocompatibility, making them unsuitable for precise medical device applications, particularly in environments requiring high stress resistance and imaging visibility.
Method used
A Pt alloy composition with a high Pt content and added elements Ti, Zr, Nb, Mo, Hf, or Ta, utilizing precipitation strengthening to enhance mechanical properties while maintaining X-ray visibility and biocompatibility.
Benefits of technology
The Pt alloy exhibits improved tensile strength, elastic limit, and processability, ensuring stable performance in medical devices like embolization coils and guide wires, with enhanced X-ray visibility and reduced risk of damage or fracture.
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Smart Images
Figure JP2025041908_02072026_PF_FP_ABST
Abstract
The present invention relates to a medical Pt alloy comprising a Pt alloy containing a metal M. In the Pt alloy according to the present invention, the metal M contains at least one of 6-11 at% of Ti, 3.5-9 at% of Zr, 5-11 at% of Nb, 6-16 at% of Mo, 4-9 at% of Hf, and 5-10 at% of Ta. The Pt alloy comprises the metal M with a total content of 3.5-18 at%, with the balance being Pt and inevitable impurities. The medical Pt alloy of the present invention has biocompatibility and X-ray visibility and also has good mechanical properties and workability. The medical Pt alloy of the present invention is formed into a medical member in the form of a Pt alloy wire rod or another form and then applied to medical devices such as embolization coils, guide wires, stents, and catheters.
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