Variable flow and pressure ventilation system
US6279574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/1025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A ventilation system supplies a gas mixture that is humidified and heated through a proportional valve which is a fail closed and normally closed servo control valve positioned proximate a patient. The proportional valve is operated by a controller that regulates the pressure and the mode (e.g., high frequency, normal respiration, combinations) gas is delivered to the patient through a nozzle connected to the endotracheal tube. The nozzle has an exhaust connected to it and a pressure sensor through a pressure sensing port. The exhaust is a capped corrugated tube that is heated and perforated to allow air to escape, to muffle gas and respiration noises, and to trap moisture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.