Flick M R, Block A J
Heart Lung. 1977 Nov-Dec;6(6):990-3.
A new device for continuous measurement of arterial oxygen saturation (SaO2), the Hewlett-Packard Model 47201A ear oximeter, was evaluated. The oximeter calculates saturation as a function of light transmittance through the patient's arterialized pinna. Oximeter SaO2 was compared with SaO2 calculated from 133 simultaneously obtained measurements of arterial blood pH and arterial oxygen tension in 19 subjects. The coefficient of correlation between these two is 0.9884 over a wide range of SaO2 (47 to 99 per cent) with a mean error of 1.09 per cent saturation. The line of regression with 95 per cent confidence bands is SaO2 (oximeter) = 6.51 + 0.93 (+/-0.02) SaO2 (arterial blood). The device permits continuous accurate measurement of SaO2 in vivo and is invaluable for indicating trends in clinical studies and appropriate times to do arterial blood studies.
对一种用于连续测量动脉血氧饱和度（SaO2）的新设备——惠普47201A型耳部血氧计进行了评估。该血氧计通过测量透过患者动脉化耳廓的光透射率来计算饱和度。将血氧计测得的SaO2与19名受试者同时获得的133次动脉血pH值和动脉血氧分压测量值所计算出的SaO2进行了比较。在较宽的SaO2范围（47%至99%）内，这两者之间的相关系数为0.9884，饱和度平均误差为1.09%。带有95%置信区间的回归方程为：SaO2（血氧计）= 6.51 + 0.93（±0.02）SaO2（动脉血）。该设备能够在体内连续准确地测量SaO2，对于临床研究中指示趋势以及确定进行动脉血研究的合适时机非常重要。
