Hird M F, Greenough A
Regional Newborn Centre, King's College Hospital, London, UK.
Clin Phys Physiol Meas. 1990 Nov;11(4):307-12. doi: 10.1088/0143-0815/11/4/003.
We have evaluated a new patient triggered (PT) ventilator which has been produced as suitable for neonatal use. This ventilator, the Draeger Babylog 8000, is triggered by airflow changes detected by a hot wire anemometer. Laboratory assessment demonstrated maintenance of tidal volume and absence of inadvertent PEEP at flow rates up to 20 l min-1 and rates of 120 breaths min-1. The ventilator was then used in both conventional and trigger mode in 14 pre-term infants. The results were compared with PT ventilation delivered by the SLE ventilator. At all inflation times studied, using the Draeger ventilator 100% of respiratory efforts were detected in the majority of infants. The trigger delay varied from a median of 80-100 ms and was significantly shorter than the trigger delay of the SLE system (P less than 0.05). Oxygenation improved on Draeger PT compared with conventional ventilation, however, only in infants more mature than 27 weeks gestation. We conclude the Draeger Babylog 8000 is an important advance in patient triggered ventilation, particularly at fast frequencies, but PT ventilation should still be restricted to relatively mature infants.
我们评估了一款新的患者触发（PT）呼吸机，该呼吸机已被生产为适合新生儿使用。这款呼吸机，即德尔格Babylog 8000，由热线风速仪检测到的气流变化触发。实验室评估表明，在流速高达20升/分钟和频率为120次/分钟时，潮气量得以维持且未出现意外的呼气末正压。然后，该呼吸机在14名早产儿中以常规模式和触发模式使用。结果与SLE呼吸机提供的PT通气进行了比较。在所有研究的充气时间，使用德尔格呼吸机在大多数婴儿中检测到100%的呼吸努力。触发延迟的中位数在80 - 100毫秒之间变化，且明显短于SLE系统的触发延迟（P小于0.05）。与传统通气相比，德尔格PT模式下的氧合有所改善，然而，仅在胎龄超过27周的婴儿中如此。我们得出结论，德尔格Babylog 呼吸机在患者触发通气方面是一项重要进展，特别是在高频时，但PT通气仍应限于相对成熟的婴儿。
