Nec Tokin Corporation

Tohoku University

Japan Stent Technology Co., Ltd.

Kouji Mori

Kiyoshi Yamauchi

Shuzou Yamashita

Yuji Sutou

Michihide Ozawa

Takamitsu Takagi

A Ti&#x2014;Ni&#x2014;Nb alloy device is provided which is a shape memory device excellent in response characteristics. The Ti&#x2014;Ni&#x2014;Nb alloy device is made of a Ti&#x2014;Ni&#x2014;Nb alloy which finishes transformation at a temperature lower than 10&#xb0; C. after start of reverse transformation.

Ti-Ni-Nb alloy device

To provide a stent which holds various performances such as deliverability, prevention of restenosis, flexible shape conformability, and so on and is therefore adaptable not only to a bile duct but also to a blood vessel system such as a tortuous coronary artery substantially without causing restenosis. A stent with an autonomic function is made of a Ti&#x2014;Ni based shape memory alloy and has a maximum expanding force at a center portion in its lengthwise direction.

Stent with autonomic function

A balloon expandable superelastic stent is made of a Ti&#x2014;Ni&#x2014;Nb (the content of Nb being at least 3 at %) shape memory alloy. A shape recovery temperature of the stent is lower than a living body temperature in an unloaded state after shape memory treatment. The shape recovery temperature exceeds the living body temperature after the stent is mounted to a catheter and released from the catheter in a living body.

Balloon expandable superelastic stent

Growing community of inventors

Okayama, Japan

Kouji Mori