The General Hospital Corporation

Sisters of Prividence in Oregon

Thomas E Haw

Kenton W Gregory

Brian Campbell Wilson

Lothar Lilge

Krishna M Bhatta

Hanqun Shanqquan

Illumination devices (20, 20', 20', 20'') for delivering ultraviolet light to an in vivo treatment site comprise an optical fiber (22) having an illumination window (40, 40', 40', 40''). A circumferential contour (46, 46', 46', 46'') of the core is shaped along the illumination window so that, for an internally reflected ray travelling in the core, the internally reflected ray has differing angles of incidences along the illumination window. In addition, the contour of the circumferential core causes rays travelling parallel to a major axis of the optical fiber to strike the core-scattering layer interface, thereby resulting in greater irradiance. In one embodiment, in the illumination window (40') a circumferential contour (46') of the core is shaped by etching to have an essentially semi-conical shape. In another embodiment, in the illumination window (40') the circumferential contour of the core has a plurality of circumferential segments (46a', 46b', 46c'), one of which has an essentially semi-conical shape and another of which has a reduced radius annular shape. In another embodiment, a reflective surface (60) is formed at a distal end of the optical fiber. An optical scattering material (48, 48', 48') is formed over the fiber core in the illumination window. The optical scattering material is preferably an admixture of optical epoxy and Al.sub.2 O.sub.3.

Illuminator devices for ultraviolet light delivery and methods of making

The invention features a probe for radiance dosimetry. The probe includes a tip portion containing a fluorescent dye connected to a translucent spacer element.

Probes for radiance dosimetry

A coagulating scalpel including a cutting and coagulating element and a dissecting element. The dissecting element and cutting and coagulating element is positioned and configured and of such size that tissue to be cut can pass over or along a surface of the dissecting element and into the cutting zone of the scalpel. The surface of the dissecting element is adapted to permit substantially free passage of the tissue over or along the surface of the dissecting element upon movement of the scalpel.

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Portland, OR, United States of America

Thomas E Haw