| 摘要 |
<p>This invention is a respiratory gas delivery system to cyclically deliver a controlled volume of air to a patient. The system includes a variable speed rotary compressor (10) driven by a rotary electric motor (12) and a directional valve means (16), all of which are controlled by a microcomputer (26). The microcomputer includes means to select a reference value for the delivered air volume (44), means to measure the instantaneous flow rate (40), means to integrate the flow rate measurement during a delivery interval and means to adjust the compressor speed on the next succeeding delivery interval following a delivery interval in which the flow rate measurement is integrated.</p> |
