Bruce W Hedger

US Patent:

51999390, Apr 6, 1993

Filed:

Feb 23, 1990

Appl. No.:

7/484117

Inventors:

Michael D. Dake - Los Angeles CA
Bruce Hedger - Paramount CA
Stephen Oesterle - Los Angeles CA

International Classification:

A61N 500

US Classification:

600 3

Abstract:

A method for preventing restenosis after angioplasty comprises internally radiating the treated portion of the lumen to prevent restenosis of the enlarged lumen portion. A device useful for radiating the treated portion comprises an elongated flexible catheter with radioactive means located in a distal section of the carrier. Stiffening elements are located along the length of the catheter to enable the catheter to be pushed through the tortuous segments of coronary or peripheral vasculature without crimping.

US Patent:

41904613, Feb 26, 1980

Filed:

Mar 20, 1978

Appl. No.:

5/890572

Inventors:

Bruce W. Hedger - Burbank CA

Assignee:

Alpha-Omega Services, Inc. - Paramount CA

International Classification:

B08B 312

US Classification:

134 1

Abstract:

Described herein is a method for removing radioactive metal seeds from embedment in nylon. Nylon is added to a solvent to form a mixture comprising dissolved and undissolved nylon, solvent, and metallic seeds and the mixture is subjected to ultrasonic waves to substantially completely dissolve the nylon in the solvent, thus freeing up the metallic seeds. The solvent is decanted and the foregoing steps are repeated followed by adding acetone and decanting all resulting liquid. Finally the seeds are dried.