Patent ID: 9539440
Date: 2017-01-10
CPC Classifications: A61N

Claim:
1. A light-emitting, therapeutic system configured to treat biological tissue, comprising: a source of electromagnetic radiation; a waveguide positioned to receive electromagnetic radiation from the source, the waveguide comprising: an optical output element near one of the first and second ends of the waveguide; wherein the fluorescent substance is configured to absorb at least a portion of the electromagnetic radiation from the source through the wall and generate fluorescent light in response to the electromagnetic radiation, wherein the waveguide is configured to guide the fluorescent light emitted by the fluorescent substance towards the optical output element by internally reflecting at least a portion of the fluorescent light, and wherein the optical output element is configured to direct at least a portion of the fluorescent light towards biological tissue; a fluid conduit in fluid communication with the first and second ports and configured to carry the fluorescent substance between the waveguide's passage and a fluid moving system, the fluid moving system adapted to move the fluorescent substance from the first end to the second end through the passage and from the second end back to the first end through the fluid conduit; and a polarity filter configured to be coupled to the fluid conduit and to remove the fluorescing agent from the fluorescent substance, the fluid conduit being configured to direct the fluorescent substance through the polarity filter during a first mode of operation and to bypass the polarity filter during a second mode of operation.