The accuracy of 476 oxygen flowmeters was investigated using a thermal mass flowmeter in eight hospitals in France and Belgium. Different oxygen flow rates (2 to 15 l/min) were evaluated at the patient’s bed. When the sample was considered as a whole, the accuracy of delivered flow was acceptable but precision was poor. The variability of the delivered flow between devices was greater when a low flow rate was required. Compensated-pressure oxygen flowmeters for these low rates were more accurate than their non-compensated counterparts. This study emphasizes the need to individually adapt the oxygen flow rate each time a patient has to move from one flowmeter to another.
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机译：在法国和比利时的八家医院中使用热质量流量计对476氧气流量计的精度进行了研究。在病床上评估了不同的氧气流速（2至15 l / min）。当将样品视为一个整体时，输送流量的精度是可以接受的，但精度很差。当需要低流速时，设备之间传递的流量的可变性更大。这些低速率的补偿压力氧气流量计比无补偿氧气流量计更准确。这项研究强调，每次患者必须从一个流量计移动到另一流量计时，都需要单独调整氧气流量。
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