Tamsma T J, Spoelstra A J
Department of Anaesthesiology, Free University Hospital, Amsterdam, The Netherlands.
Acta Anaesthesiol Scand Suppl. 1989;90:75-8. doi: 10.1111/j.1399-6576.1989.tb03009.x.
During distal high frequency jet ventilation (HFJV) in anaesthetized healthy dogs gas flows were recorded at the proximal end of the open tracheal jet tube. Spirometer measurements of minute volumes with and without entrainment were made. During the inspiratory or insufflation period, leakage of jet gas (bypass) could occur depending on the ventilator setting. From the gas flow recordings and the spirometer measurements, jet-, entrainment- and bypass minute volumes were determined. From these the effective minute volume, that is the minute volume of fresh gas entering the lungs, was calculated, as well as tidal volume. The results show that entrainment volumes are relatively small in an open system of distal HFJV and that at the same time bypass can (nearly) completely eliminate the effect of entrainment on tidal volume.
在对麻醉的健康犬进行远端高频喷射通气（HFJV）期间，在开放气管喷射管近端记录气流。进行了有和没有夹带情况下分钟通气量的肺量计测量。在吸气或吹入期，根据呼吸机设置，喷射气体可能会发生泄漏（旁路）。根据气流记录和肺量计测量结果，确定喷射、夹带和旁路分钟通气量。由此计算出有效分钟通气量，即进入肺部的新鲜气体分钟通气量，以及潮气量。结果表明，在远端HFJV的开放系统中，夹带量相对较小，同时旁路可以（几乎）完全消除夹带对潮气量的影响。
