| 摘要 |
Apparatus for the administration of gases such as oxygen, anaesthetic gases, or the like, incorporating a chamber adapted to communicate with a face mask, gas delivery means for delivering gas into said chamber, valve means for intermittently discontinuing delivery of gas thereto, vent means for intermittently venting said chamber to atmosphere for exhalation, and, pressure relief valve means communicating with said chamber for venting the same to atmosphere in the event of an overpressure occurring therein. |
