Chakrabarti M K, Holdcroft A, Sapsed-Byrne S, Whitwam J G
Department of Anaesthetics, Royal Postgraduate Medical School, Hammersmith Hospital, London.
Br J Anaesth. 1990 Mar;64(3):374-8. doi: 10.1093/bja/64.3.374.
A new, simple and inexpensive oscillatory ventilator is described in which a rotating jet mounted in the breathing duct generates cyclically positive and negative pressures in the airway with a sinusoidal flow waveform. Unlike conventional oscillatory ventilators it is free from restrictions to inspiratory or expiratory gas flows and open to atmosphere at all times, making it intrinsically a safe system for ventilation. A prototype rotating jet oscillatory ventilator designed for application in infants was evaluated in rabbits (mean weight 3.8 kg). The positive peak and mean airway pressures were significantly less during oscillatory ventilation at 300 and 420 b.p.m. compared with normal and high frequency positive pressure ventilation at 30 and 300 b.p.m., respectively, while maintaining blood-gas tensions within the normal range. An increase in the oscillatory frequency from 300 to 420 b.p.m. provided no further benefit in terms of airway pressure, tidal volume or blood-gas tensions.
本文描述了一种新型、简单且廉价的振荡呼吸机，其中安装在呼吸管道中的旋转射流在气道中产生具有正弦流波形的周期性正压和负压。与传统的振荡呼吸机不同，它不受吸气或呼气气流的限制，并且始终向大气开放，使其本质上是一种安全的通气系统。对一种设计用于婴儿的旋转射流振荡呼吸机原型在兔子（平均体重3.8千克）身上进行了评估。在300和420次/分钟的振荡通气过程中，正峰压和平均气道压分别显著低于30和300次/分钟的正常和高频正压通气，同时将血气张力维持在正常范围内。将振荡频率从300次/分钟增加到420次/分钟在气道压力、潮气量或血气张力方面没有进一步的益处。
