[Collecting end-expiratory air for capnography in high-frequency jet ventilation].
By means of an ejector attachment to the endotracheal tube a negative intratracheal pressure of approx. -1 mmHg is created during an interruption of HFJV. Within 4 to 10 sec. this suction supplies alveolar air to the distal end of the endotracheal tube where capnographic analysis is possible in the mainstream or bystream. The end-tidal pCO2 differs by 0.1 mmHg (mean) from the arterial carbon dioxide partial pressure with a highly positive correlation (R = 0.98).
D002245:Carbon Dioxide / Q000502:physiology*; D006801:Humans; D010100:Oxygen / Q000097:blood; D011015:Pneumonia, Aspiration / Q000097:blood / Q000628:therapy*; D012128:Respiratory Distress Syndrome / Q000097:blood / Q000628:therapy*; D012122:Ventilators, Mechanical
D002245:Carbon Dioxide; D010100:Oxygen
Gewinnung endexspiratorischer Luft für die Kapnographie bei hochfrequenter Jetbeatmung.