Filtration valve cap with reflux clearing feature and related method of use thereof
US6217544A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/61
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A progressive filtration system for a chest drainage unit during continuous autotransfusion that allows the user to clear the fluid pathway of blood clots and trapped air that form after filtration in a flushing action initiated by the user. The filtration system comprises a gross filter for filtering incoming blood at the inlet portion of a collection chamber of a chest drainage unit and a fine filter assembly located at the bottom portion of the collection chamber for refiltering collected blood prior to reinfusion of that blood back to the patient. The filter assembly includes a valve cap at the top portion of the assembly that functions as a one way valve that permits reflux of later developing blood clots that might clog the tubing once the blood has already passed through the assembly. The valve cap is also adapted for sealing engagement with a drop tube that places the filter assembly in fluid flow communication with an outlet of the collection chamber located at the top portion of the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.