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Title: Intrauterine device for laser light diffusion and method of using the same

An improved device for delivery of photoenergy from a light source, such as a laser, into a uterine cavity for photodynamic therapy is comprised of a plurality of optic fibers, which are bundled together and inserted into the uterine cavity by means of a uterine cannula. The cannula is positioned within the uterine cavity at a preferred location and then withdrawn thereby allowing the plurality of optic fibers to splay or diverge one from the other within the cavity. Different portions of the distal tip of the optic fiber is provided with a light diffusing tip, the remainder being provided with a nondiffusing tip portion. The fiber optic shape, as well as the segment which is permitted to actively diffuse light through the tip, is selected in order to provide a more uniform exposure intensity of the photo energy or at least sufficient radiation directed to each segment of the uterine walls.
 [1];  [2];  [3];  [1]
  1. (Irvine, CA)
  2. (Trabuco Canyon, CA)
  3. (Trondheim, NO)
Issue Date:
OSTI Identifier:
Regents of University of California (Oakland, CA) OAK
Patent Number(s):
US 5478339
Contract Number:
Research Org:
University of California
Country of Publication:
United States
intrauterine; device; laser; light; diffusion; method; improved; delivery; photoenergy; source; uterine; cavity; photodynamic; therapy; comprised; plurality; optic; fibers; bundled; inserted; means; cannula; positioned; preferred; location; withdrawn; allowing; splay; diverge; portions; distal; tip; fiber; provided; diffusing; remainder; nondiffusing; portion; shape; segment; permitted; actively; diffuse; selected; provide; uniform; exposure; intensity; photo; energy; sufficient; radiation; directed; walls; optic fiber; tip portion; light source; fiber optic; laser light; optic fibers; radiation directed; uterine cavity; photodynamic therapy; improved device; /606/607/