Eye surgery apparatus with vacuum surge suppressor

Details Eye surgery apparatus with vacuum surge suppressor Eye surgery apparatus with vacuum surge suppressor

1989-11-28

1992-04-21

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

604119, 604247, 417540, A61M 100

Patent

active

051063670

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.

REFERENCES:
patent: 1579891 (1926-04-01), Sandoz
patent: 2448118 (1948-08-01), Pellettere
patent: 3469582 (1969-09-01), Jackson
patent: 3851661 (1974-12-01), Fernandez
patent: 3874417 (1975-04-01), Clay
patent: 4041947 (1977-08-01), Weiss et al.
patent: 4062360 (1977-12-01), Bentley
patent: 4921477 (1990-05-01), Davis

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