Emergency ventilation tube
US4446864A · kind A · utility
Inventors
Key dates
| Filing date | Jul 7, 1981 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Jul 7, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0463
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An emergency esophageal ventilating airway includes coaxial tubular members insertable through a patient's mouth and into the esophagus. The coaxial tubes are attached to a coupling which is inserted into a standard face mask. The longer, inner, one of the tubes extends into the lower esophagus and has an inflatable occluding cuff at its inner or lower end while the outer end extends through the coupling and mask to the atmosphere providing a clear venting passage from the stomach. The outer tube has holes lying near the laryngeal region and communicates, through chambers in the coupling, with a ventilating gas supply. A second embodiment includes tubes of equal length in concentric relationship, the cuff being on the outer tube. In the second embodiment, the inner tube is distensible so that, when relaxed, maximum air flow volume is available. The inner tube expands to permit passage of an NG tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.