Electronically controlled respirator
US4393869A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Jun 22, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/209
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The breathing cycle of a patient is controlled to achieve proper ventilation and at the same time minimize the work of distension of the lungs. Oxygen enriched air is delivered to the patient during the inspiration period such that the pressure waveform is a ramp function having initial and final values which are dependent on the resistance, compliance and alveolar volume of the lungs. The apparatus includes a source of oxygen enriched air at a regulated pressure and a pneumatically controlled pressure reducing valve for reducing the pressure of the oxygen enriched air for delivery to the patient. The valve is controlled by a transducer which converts an electrical control signal into a pneumatic control signal. The electrical control signal which is generated by an electronic control circuit, is a function of the parameters of the patient's lungs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.