Beydon L, Liu N, Hassapopoulos J, Rua F, Bonnet F, Harf A, Duvaldestin P
Service d'Anesthésie-Réanimation, Hôpital Henri Mondor, Créteil, France.
Intensive Care Med. 1992;18(1):32-7. doi: 10.1007/BF01706423.
Infrequent control, aging of components, may compromise the accuracy of ICU ventilators. In order to assess the reliability of ventilators during their clinical use, we bench tested a group of 20 CPU1 ventilators (Ohmeda) sampled at random in several ICU units. We found major leaks in 5 ventilators, attributable to the disposable tubings used in these systems. Mean error in expired tidal volume and corresponding standard deviation (precision) were greater than 100 ml in two. Positive end expiratory pressure measurement comprised a mean error higher than 2 cm H2O in 40% of the ventilators tested. The valve opening pressure threshold was correlated to the inspiratory flow (r = 0.81) contrary to the valve opening delay (average 138 +/- 40 ms). These two parameters did not correlate with the age of the ventilator. Our study addresses the need for periodic control of ventilator performance in order to minimize the risks of errors and malfunctions.
控制不频繁、部件老化可能会影响重症监护病房（ICU）呼吸机的准确性。为了评估呼吸机在临床使用中的可靠性，我们对从几个ICU病房随机抽取的一组20台CPU1呼吸机（Ohmeda）进行了台架测试。我们发现5台呼吸机存在重大泄漏，原因是这些系统中使用的一次性管道。两台呼吸机的呼出潮气量平均误差及相应标准差（精度）大于100毫升。在40%的测试呼吸机中，呼气末正压测量的平均误差高于2厘米水柱。与阀门开启延迟（平均138 +/- 40毫秒）相反，阀门开启压力阈值与吸气流量相关（r = 0.81）。这两个参数与呼吸机的使用年限无关。我们的研究表明需要定期对呼吸机性能进行控制，以尽量减少错误和故障风险。
