Systems and methods for gas mixing in ocular surgical equipment
US11701256B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2019 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | May 20, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/0612
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A gas mixing system for providing mixed gas for intraocular injection. In some embodiments, a first fixed-volume chamber is automatically purged and filled with gas from a first gas supply input, to a first predetermined pressure. A second fixed-volume chamber is purged and filled with gas from a second gas supply input, to a second predetermined pressure. The first and second predetermined pressures are determined based on a desired concentration of gases in the final mix, and the respective volumes of the first and second fixed-volume chambers and of a third fixed-volume chamber. Gas from the first fixed-volume chamber is then allowed to mix with gas in the third fixed-volume chamber, which was previously purged. Next, gas from the second fixed-volume chamber is allowed to mix with gas in the third fixed-volume chamber. Finally, the mixture of gases in the third fixed-volume chamber is expressed into an intraocular syringe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.