Surgery – Miscellaneous – Methods
Reexamination Certificate
2007-07-05
2010-06-08
Farah, Ahmed M (Department: 3769)
Surgery
Miscellaneous
Methods
C606S007000, C606S015000
Reexamination Certificate
active
07730894
ABSTRACT:
Light generating devices for illuminating portions of vascular tissue, to render photodynamic therapy. In one embodiment, a light source array preferably including a plurality of light emitting diodes, a focusing lens, and a light diffusing element are included in a distal end of a catheter. A balloon is optionally provided to interrupt blood flow that can block the transmission of light, and to center the apparatus in a blood vessel. Optical fibers optionally direct light from the light source to the diffusing element. The light source array can have a radial or linear configuration and can produce more than one wavelength of light for activating different photoreactive agents. Linear light source elements are particularly useful to treat elongate portions of tissue in a vessel. One embodiment intended for use with a conventional balloon catheter integrates light sources into a guidewire.
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Bishop Jean
Burwell Phillip
Daly Steven Ross
Guo Zihong
Lichttenegger Gary
Anderson Ronald M.
Farah Ahmed M
Light Sciences Oncology, Inc.
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