Variable vacuum/variable flow phacoemulsification method

Details Variable vacuum/variable flow phacoemulsification method Variable vacuum/variable flow phacoemulsification method

1993-06-22

1994-08-30

Rosenbaum, C. Fred

Surgery

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

With means for cutting, scarifying, or vibrating tissue

604 28, 604 30, A61B 1720

Patent

active

053422937

ABSTRACT:
A method useful in a process for cataractous lens removal for operating phacoemulsifier apparatus having a vacuum pump and a fluid irrigation pump in order to simultaneously control vacuum, for aspiration, and fluid flow, for irrigation, to a phacoemulsifier handpiece. The method includes selecting a vacuum limit for aspiration; selecting a fluid flow limit for irrigation; assigning a linear relationship between a remotely disposed control lever and vacuum provided to the handpiece by the vacuum pump between zero and the vacuum limit; supplying vacuum to the handpiece by actuating the control lever; and controlling the fluid flow to the handpiece in response to the level of vacuum provided to the handpiece so that as more vacuum is provided, less fluid flow than the fluid flow limit is provided to the handpiece.

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patent: 5084012 (1992-01-01), Kelman
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