Mayock D E, Tremblay L
Crit Care Med. 1984 Aug;12(8):638-41. doi: 10.1097/00003246-198408000-00006.
The static and dynamic responses of diaphragm-type pressure manometers currently used with manual ventilation in the neonatal ICU were determined at different pressures and frequencies. Using a precalibrated transducer attached to a closed-loop system, the manometer peak pressure was adjusted to 15, 20, 25, and 30 cm H2O, first for static measurements and then again while the frequency was increased from 20 to 200 breath/min in increments of 20. Most manometers with inlet flow-restricting devices built into the manometer or attached to the connection system in a ventilator significantly underestimated the delivered pressure as the peak inflation pressure and frequency were increased. In those manometers without inlet flow restrictors the correlation between transducer pressure and observed manometer pressure was close. Diaphragm-type pressure manometers with inlet flow-restricting devices may substantially underestimate the delivered proximal airway pressure when incorporated into neonatal manual ventilation equipment.
在新生儿重症监护病房（NICU）中，针对当前手动通气时使用的膜片式压力计，在不同压力和频率下测定了其静态和动态响应。使用连接到闭环系统的预校准传感器，将压力计的峰值压力先调整至15、20、25和30厘米水柱进行静态测量，然后在频率从20次/分钟以20次/分钟的增量增加至200次/分钟时再次进行测量。随着峰值充气压力和频率增加，大多数在压力计内或连接到呼吸机连接系统中内置有进气流量限制装置的压力计，显著低估了输送压力。在那些没有进气流量限制器的压力计中，传感器压力与观察到的压力计压力之间的相关性紧密。当用于新生儿手动通气设备时，带有进气流量限制装置的膜片式压力计可能会大幅低估输送的近端气道压力。
