Microminiature illuminator for administering photodynamic therap

Details Microminiature illuminator for administering photodynamic therap Microminiature illuminator for administering photodynamic therap

1995-05-26

1996-11-05

Sykes, Angela D.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Light application

604 21, 606 14, A61N 130

Patent

active

055711529

ABSTRACT:
A plurality of microminiature light sources (10, 10') are injected at a treatment site to effect photodynamic therapy (PDT). Each of the microminiature light source beads includes an LED chip (12), a rectifier chip (14), and a plurality of electromagnetic receivers (18, 18') encapsulated within a biocompatible, light transmitting material such as silicone, forming a spherical bead that is only a few millimeters in diameter. The light source beads are sufficiently small so that they can be injected into a treatment site such as a tumor (46) from a syringe (58) through a needle (60). A photoreactive agent, which can serve as a carrier fluid for the microminiature light source beads, sensitizes the tissue at the treatment site so that light emitted by the LED chip when energized with an external electromagnetic transmitter (34) kills the tissue or other pathogens at the treatment site that have absorbed the photoreactive agent. Alternatively, a catheter (66) can be used for emplacing the microminiature light source beads at the treatment site.

REFERENCES:
patent: 3785383 (1974-01-01), Dotto
patent: 4336809 (1982-06-01), Clark
patent: 4512762 (1985-04-01), Spears
patent: 5445608 (1955-08-01), Chen et al.
patent: 5474528 (1995-12-01), Meserol
patent: 5489279 (1996-02-01), Meserol
G. Loeb, C. Zamin, J. Schulman, & P. Troyk, "Injectable microstimulator for functional electrical stimulation," North Sea: Transducers and electrodes, North Sea special feature, Nov. 1991, pp. NS13-NS19.
Y. Mitamura, E. Okamoto, A. Hirano, and T. Mikami, "Development of an Implantable Motor-Driven Assist Pump System," IEEE Transactions on Biomedical Engineering, vol. 37, No. 2, Feb. 1990, pp. 146-156.

Affiliated with

Also associated with

Rating

Microminiature illuminator for administering photodynamic therap does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microminiature illuminator for administering photodynamic therap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microminiature illuminator for administering photodynamic therap will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2010901