Vitrectomy cutting mechanism
US4696298A · kind A · utility
321Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1985 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Nov 19, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/00763
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved vitrectomy probe for removing vitreous and cutting mechanism therefore. A hollow elliptically flared cutting blade is reciprocated within a smooth-bore hollow needle of a microsurgical vitrectomy probe across a cutting edge of the outer needle slicing the fibrous material of the vitreous. The cutting blade is configured to provide a more even contact of the cutting surfaces as the cutting blade is reciprocated across the cutting edge of the probe needle. A pressurized fluid source, diaphragm and spring cooperate to provide for the reciprocation of the blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.