Variable vacuum/variable flow phacoemulsification method
US5342293A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Jun 22, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/77
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.