Stephan Gaspar

US Patent:

51063670, Apr 21, 1992

Filed:

Nov 28, 1989

Appl. No.:

7/442306

Inventors:

Alexander Ureche - El Toro CA
Stephan Gaspar - Santa Ana CA

International Classification:

A61M 100

US Classification:

604 30

Abstract:

Collapse of the cornea into the cavity formed when material such as the lens is removed from an eye in the irrigation-aspiration method is minimized by incorporating a pressure responsive, variable flow resistance element in the aspiration line of the irrigation-aspiration apparatus. A preferred pressure responsive, variable resistance element is a length of thin walled tubing which is easily collapsed to smaller flow path area in response to increasing negative pressure in the aspiration line.

US Patent:

51676206, Dec 1, 1992

Filed:

Jan 22, 1992

Appl. No.:

7/823751

Inventors:

Alexander Ureche - Mission Viejo CA
Stephan Gaspar - Santa Ana CA

International Classification:

A61M 100

US Classification:

604 28

Abstract:

Collapse of the cornea into the cavity formed when material such as the lens is removed from an eye in the irrigation-aspiration method is minimized by incorporating a pressure responsive, variable flow resistance element in the aspiration line of the irrigation-aspiration apparatus. A preferred pressure responsive, variable resistance element is a length of thin walled tubing which is easily collapsed to smaller flow path area in response to increasing negative pressure in the aspiration line.