Respiration monitoring apparatus and method
US4444201A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1981 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Aug 19, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0036
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A respiration monitoring apparatus which comprises meters for determining the flow rate of air flow and the airway pressure of the living body fitted with an artificial respirator; a monitor for displaying the waveforms of output signals from the meters. The apparatus further comprises a signal processing circuit which detects the end of the respective expiratory periods from the marks indicated by the output signals from the meters which denote the flow rate of breathed air flow, stores the average value of the airway pressures determined at the end of the respective expiratory periods, and, where the measured airway pressure determined falls below the stored average value, issues a detection signal denoting this condition, thereby changing a display pattern on the monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.