Quick-opening vent valve for phaco fluidics aspiration system
US9931447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2014 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Aug 6, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/0612
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatuses, systems, and methods are provided for rapid venting of vacuum to mitigate occlusion break surge within a phaco fluidics aspiration system. The aspiration system may utilize a positive displacement pump to generate flow and a vent valve to vent or moderate the pressure or vacuum level based on pressure sensor feedback detected within the eye and at the pump. Embodiments described herein provide a quick-opening vent valve that produces a quick-opening flow response upon angular rotation of the quick-opening vent valve. The flow performance at the quick-opening vent valve is improved by increasing the effective cross-sectional area of the valve at near-closed valve positions. In particular, the increase in the cross-sectional area is achieved by forming a concaving edge portion to complement a circular edge of and opening of a flow channel formed through the vent valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.