Medical drainage device with flow restriction feature
US6346096B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides for a dual port arrangement for a water seal chamber of a drainage device for channeling and restricting fluid flow through the water seal during normal operation of the device when the patient is breathing normally, while preventing the breach of the water seal during reverse flow conditions when the patient takes a sudden and deep inhalation. The dual port arrangement comprises a narrow side port and a low profile tunnel port defining an elongated conduit interposed between and in communication with both arms of the water seal chamber. The side port has a thin slot configuration that restricts fluid flow communication through the side port, and the back tunnel port defines a low profile, elongated conduit with openings that channel fluid flow between both arms of the water seal chamber. The elongated configuration of the conduit prevents a steep water gradient from falling below the upper portion of the conduit opening during reverse flow conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.