Diffusion tip for optical fibers

Details Diffusion tip for optical fibers Diffusion tip for optical fibers

1992-03-16

1993-12-14

Aschenbrenner, Peter A.

Surgery

Instruments

Light application

606 15, 606 16, A61B 1736

Patent

active

052697770

ABSTRACT:
A cylindrical diffuser tip for use with an optical fiber is described. The diffuser tip comprises a silicone core abutted to the terminus of the conventional optical core of an optical fiber, an outer layer of silicone plus a suitable scatterer, and a final cladding of plastic tubing to provide controlled stiffness or rigidity to the silicone diffuser tip while maintaining a flexibility comparable to the optical fiber. The tip provides a substantially uniform distribution of radiance along its length and is particularly useful for laser radiation treatment of tumors. The stiffness of the diffuser tip can be varied by choosing an outer tubing of varying wall thickness and durometer. The diffuser tip is useful for providing uniform cylindrical illumination of target tissue in remote areas of the body and is particularly useful in such areas as Photodynamic Therapy of tumors and atheromas and hyperthermia.

REFERENCES:
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patent: 4660925 (1987-04-01), McCaughan
patent: 4693556 (1987-09-01), McCaughan
patent: 4736743 (1998-04-01), Dakiuzono
Wagineres et al., "Photodynamic Therapy of early cancer . . . ", SPIE Inst. Series vol. IS6 (1990).

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