Flexible elongate device having a distal extremity of adjustable

Details Flexible elongate device having a distal extremity of adjustable Flexible elongate device having a distal extremity of adjustable

1993-11-02

1995-06-13

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 96, 604 95, A61M 2500, A61M 2900, A61M 3700

Patent

active

054237718

ABSTRACT:
A device comprising a flexible elongate member having proximal and distal extremities. A flexible coil spring is provided having proximal and distal extremities. The proximal extremity of the coil spring is secured to the distal extremity of the flexible elongate member. A shape-memory alloy element is disposed within and extends substantially longitudinally of the coil spring. The shape-memory alloy element has a memory which makes it attempt to assume a straight shape when an electrical current is passed through and heats the same. The shape-memory alloy element also has a stiffness which increases with the temperature of the element. An electrical current supply is provided for supplying an electrical current to the shape-memory alloy element for changing the stiffness of the shape-memory alloy element to thereby stiffen the distal extremity of the flexible elongate member.

REFERENCES:
patent: 4884557 (1989-12-01), Takehana et al.
patent: 5090956 (1992-02-01), McCoy
patent: 5114402 (1992-05-01), McCoy
patent: 5120308 (1992-06-01), Hess
"Table of Radio Frequencies", Webster's II New University Dictionary, Houghton Mifflin Co., Boston, Mass. 02108, p. 970.

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