Haldemann G
Schweiz Med Wochenschr. 1978 Mar 18;108(11):397-401.
For about twenty years, the method for prolonged artificial respiration was an imitation of spontaneous breathing pattern. New pathophysiological informations about acute respiratory failure showed that a technique which is widely different in frequency, cycle, and tidal volume is more suitable for the fast and safe restauration of spontaneous breathing. Especially the determination of pulmonary shunt flow (QS/Qt), and of the ratio of dead space to tidal volume (VD/VT) have completed our knowledge. In the management of patients with prolonged artificial ventilation, the calculation of shunt flow allows an evaluation of therapeutic procedures. This was the reason to present a nomogram, which simplifies the determination of pulmonary shunt and to discuss an easy, non-invasive method to at least estimate its amount.
在大约二十年的时间里，延长人工呼吸的方法是模仿自主呼吸模式。关于急性呼吸衰竭的新病理生理学信息表明，一种在频率、周期和潮气量方面有很大差异的技术更适合快速、安全地恢复自主呼吸。特别是肺分流率（QS/Qt）和死腔与潮气量之比（VD/VT）的测定完善了我们的认识。在长期人工通气患者的管理中，分流率的计算有助于评估治疗程序。这就是提出一种简化肺分流测定的列线图并讨论一种至少能大致估算其数值的简便、非侵入性方法的原因。
