Photoemitting catheters and other structures suitable for use in photo-dynamic therapy and other applications
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United States of America Patent
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Dec 22, 1998
Issued Date -
N/A
app pub date -
Nov 13, 1996
filing date -
Mar 18, 1994
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Expired
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Abstract
A structure generates electromagnetic radiation having at least one wavelength selected for activating a photo-sensitive substance that is applied to a tissue to be treated. The structure is particularly useful for photo-dynamic therapy (PDT) applications. The structure includes a body of material, such as a polymer filament, band, or substrate, that contains a gain medium. The gain medium in turn contains a substance (such as dye molecules) for generating a stimulated emission that includes the at least one wavelength when excited by a pump wavelength, and a plurality of scattering sites (such as scattering particles) for scattering the stimulated emission to provide a narrow band emission at the at least one selected wavelength. The narrow band emission in turn activates the photo-sensitive therapeutic substance.
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