Medical catheters thermally manipulated by fiber optic bundles

Details Medical catheters thermally manipulated by fiber optic bundles Medical catheters thermally manipulated by fiber optic bundles

1991-03-04

1992-10-06

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604281, A61M 3700

Patent

active

051527480

ABSTRACT:
A maneuverable medical catheter comprising a flexible tube having a functional tip. The catheter is connected to a control source. The functional tip of the catheter carries a plurality of temperature activated elements arranged in parallel and disposed about the functional tip and held in spaced relation at each end. These elements expand when they are heated. A plurality of fiber optic bundles, each bundle having a proximal end attached to the control source and a distal end attached to one of the elements carry light into the elements where the light is absorbed as heat. By varying the optic fiber that is carrying the light and the intensity of the light, the bending of the elements can be controlled and thus the catheter steered. In an alternate embodiment, the catheter carries a medical instrument for gathering a sample of tissue. The instrument may also be deployed and operated by thermal expansion and contraction of its moving parts.

REFERENCES:
patent: 4543090 (1985-09-01), McCoy
patent: 4753223 (1988-06-01), Bremer
patent: 4799474 (1989-01-01), Ueda
patent: 4838859 (1989-06-01), Strassman
patent: 4934340 (1990-06-01), Ebling et al.
patent: 4944727 (1990-07-01), McCoy
patent: 5019040 (1991-05-01), Itaoka et al.

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