Tool for extracting vitreous samples from an eye
US7549972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2006 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Apr 13, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/00763
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A unitary mechanical injector-vitrector hand tool for use in extracting vitreous material from an eye and injecting another fluid into the eye includes a housing body having a proximal end, a distal end and a variable volume cavity in the housing body for establishing a negative pressure or suction. A needle having a sharpened point and a central bore is connected to the proximal end of the housing body. An aperture is formed in a sidewall of the needle near the sharpened end. An inner hollow reciprocal cutter is fitted in the central bore of the needle and has a cutting edge adapted for travel across the aperture. A first manually actuatable lever is pivotably mounted to the housing body and coupled in driving relationship with the reciprocal cutter. A valve assembly is operatively positioned between the needle and the variable volume cavity and arranged to open to apply suction to the needle central bore as the reciprocal cutter travels across the aperture so as to withdraw vitreous material falling into the hollow cutter. A pressurized source of fluid is coupled by a conduit through the central bore of the needle and cutter and selectively actuated to replace the removed vitreou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.