Foot actuated pinch valve and high vacuum source for irrigation/aspiration handpiece system
US4702733A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Nov 22, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/77
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pinch valve device is disclosed for a disposable, inexpensive irrigation/aspiration handpiece system used for the removal of unwanted material in a very small, enclosed operative site in which it is important to maintain pressure within a certain range, such as in the surgical operation for removal of a cataract lens from the human eye. The device includes a foot pedal for selectively: (1) restricting the flow of irrigation and aspiration fluid in the handpiece system; (2) permitting irrigation by the handpiece system, without permitting concurrent aspiration by the handpiece system; (3) permitting both irrigation and aspiration by the handpiece system; and (4) providing selective increase in aspiration force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.