ABSORBABLE IRON-BASED ALLOY IMPLANTED MEDICAL DEVICE AND PREPARATION METHOD THEREOF

WIPO Patent Application WO/2017/084314

A1

Disclosed are an absorbable iron-based alloy implanted medical device (1) and preparation method thereof. The device (1) comprises an iron-based alloy base (11), a degradable polymer (13) arranged on the surface of the iron-based alloy base, and an alkaline protector (12) arranged on the surface of the iron-based alloy base. The alkaline protector (12) contains at least one alkaline substance capable of neutralizing the acidic substance produced by the polymer at the early stage after the device is implanted to delay the corrosion of the iron-based alloy base (1) in the early stage of implantation, hence the iron-based alloy base (12) would not substantially corrode or would corrode slowly, clinically satisfying the mechanical properties and requirements of the device (1) in the early stage of implantation; and in the meantime, after the neutralization and consumption of the alkaline protector (12) exposes the base (11), the base (11) can still accelerate the corrosion speed thereof in the acidic environment formed by the polymer (13), so as to clinically satisfy the requirement of the corrosion cycle of the device (1) at the same time.

JPH11319070	ENDOPROSTHESIS
WO/2015/006422	PLATED POLYMERIC MEDICAL PRODUCTS
JP3010378	[Title of Invention] CO-CR-MO powder metallurgy product and its manufacturing method

QI HAIPING (CN)
LIN WENJIAO (CN)

PCT/CN2016/085187

May 26, 2017

June 08, 2016

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LIFETECH SCIENT (SHENZHEN) CO LTD (CN)

A61L27/04

CN104587534A	2015-05-06
CN101411892A	2009-04-22
CN103889474A	2014-06-25
CN101560686A	2009-10-21
CN104857570A	2015-08-26

See also references of EP 3378504A4

ADVANCE CHINA IP LAW OFFICE (CN)

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