Nasal cannulae
US6776163B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/101
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A nasal cannula for use in administering a gas under pressure through a nasal passage of a user comprises at least one tubular nasal prong assembly. The assembly includes an inner tubular prong 4 having a distal end to be placed in or adjacent the nasal passage and a proximal end for connection to a supply line 2 for the gas, and also includes an outer sleeve 8 extending over at least a portion of the inner tubular prong 4 to define therewith an annular passage 10 in communication with supply line 2. The arrangement is such that when gas flows through the supply line 2 most will flow out of the distal end of the prong 4 but some will pass through the annular passage 10 to form a shrouding stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.