Artificial ventilator
US4982735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1988 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Nov 18, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An artificial ventilator includes a dome for covering the precordial and the sides of the thoracoabdominal of a patient, a blower to be used for applying negative and positive pressures within the dome, a regulator for adjusting a pressure, and the like. The valve switching device is controlled by a respiration detection system. In the respiration detection system, a pyrolelectric element is used as a respiratory sensor for detecting a temperature change rate caused by an inspired and expired air flow. The temperature change rate signal obtained by the sensor is compared with a threshold value set by a variable resistor, the start timings of expired air and inspired air are detected in accordance with the comparison result, and air inspiration and expiration start timing signals are outputted. Further, the artificial ventilator can be provided with various functions of forced respiration and intermittent deep breathing by means of a timer, synchronization only with air inspiration timings, reduction of frequency of respiration assistance for the intention not to use the ventilator in the near future, backup during apnea, and the like. The artificial ventilator allows a physilogical…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.