总之，临床症状不能很好地预示低血氧症，在资源匮乏的医疗机构进行脉搏血氧测量并借此判断是否采取吸氧疗法可以节省成本。
Overall, however, clinical signs are poor predictors of hypoxaemia, and using pulse oximetry in resource-poor health facilities to target oxygen therapy is likely to save costs.
收集的数据包括所有术前的脉搏血氧定量法记录，也就是术前动脉血气测量，以及房间隔气囊造口术过程数据。
Data collected included all preoperative pulse oximetry recordings, all values from preoperative arterial blood gas measurements, and BAS procedure data.
方法：根据双波长无创测量法的数学模型，分析临床试验中脉搏血氧仪产生测量误差的原因。
Methods: To analyze the reasons of error caused by the pulse oximeter in the clinical test on the basis of the mathematical model of double wavelengths noninvasive measurement of blood oxygenation.
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