Lee A Marshall

US Patent:

44211244, Dec 20, 1983

Filed:

Jun 8, 1981

Appl. No.:

6/271794

Inventors:

Lee Marshall - Torrance CA

International Classification:

A61B 510

US Classification:

128782

Abstract:

A pressure detection arrangement embedded between the skin of a portion of the body and a means used to surround and/or immobilize that particular part of the body, such as a cast. The pressure detection arrangement is a bifurcated capsule having a reservoir cavity and an indicator cavity. A colored fluid is initially contained only within the reservoir cavity by either a frangible disc across the conjunction of the indicator cavity with the reservoir cavity or an extensible bladder within the reservoir cavity. The indicator cavity is transparent or translucent and protrudes through the cast to regions external thereto. If there is swelling of the limb due to medical complications, the skin presses against the capsule and either breaks the frangible disc allowing the colored fluid to pass into the indicator cavity or forces the extensible bladder into the indicator cavity of the capsule. Both methods provide a visual indication in the indicator cavity of excessive pressure on the limb.

US Patent:

42866030, Sep 1, 1981

Filed:

Jun 22, 1979

Appl. No.:

6/051431

Inventors:

Lee Marshall - Torrance CA

International Classification:

A61B 510

US Classification:

128782

Abstract:

A pressure detection arrangement embedded between the skin of a portion of the body and a means used to surround and/or immobilize that particular part of the body, such as a cast. The pressure detection arrangement is a bifurcated capsule having a reservoir cavity and an indicator cavity. A colored fluid is initially contained only within the reservoir cavity by either a frangible disc across the conjunction of the indicator cavity with the reservoir cavity or an extensible bladder within the reservoir cavity. The indicator cavity is transparent or translucent and protrudes through the case to regions external thereto. If there is swelling of the limb due to medical complications, the skin presses against the capsule and either breaks the fringible disc allowing the colored fluid to pass into the indicator cavity or forces the extensible bladder into the indicator cavity of the capsule. Both methods provide a visual indication in the indicator cavity of excessive pressure on the limb.