Shape memory tubular deployment system

Details Shape memory tubular deployment system Shape memory tubular deployment system

1996-11-15

1998-12-08

Dawson, Glenn K.

Surgery

Instruments

Means for inserting or removing conduit within body

606200, 606198, A61F 1100, A61M 2900

Patent

active

058462473

ABSTRACT:
Tubes made from shape memory alloy (SMA) assume their original shape when heated to their austenite finish temperature by directing photo-thermal or electrical energy inside parts of the tube using an optical fiber or conductors, the remainder of the tube acting as a heat sink. Using this method of photo-thermal heating or joule heating, virtually any predetermined shape can be made from tubes, or objects having tubular passages, in a controlled manner with very little heat being transferred to the material surrounding the outside of the tube. The optical fiber may also be used to detect the transformation of the material at the heated site from martensite to austenite and the temperature of the heated site, and use this information to control deployment of the device and reduce overheating of the tube and the material surrounding the outside of the tube.

REFERENCES:
patent: 3868956 (1975-03-01), Alfidi et al.
patent: 4503569 (1985-03-01), Dotter
patent: 4512338 (1985-04-01), Balko et al.
patent: 5334168 (1994-08-01), Hemmer
patent: 5370109 (1994-12-01), Cuny
patent: 5653736 (1997-08-01), Glastra

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