パルスオキシメーター表示の機種差 : 較正法の標準化に関連して

概要

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Six pulse oximeters (OF=Ohmeda, MF=Minolta, NF=Novametrix, PF=Physio-Control, DF=Datex and RF=Radiometer; F means finger probe) were examined in 8 healthy non-smoking volunteers (aged 26-32) rendered hypoxic (down to SaO_2 70%) by breathing mixture of air or oxygen in nitrogen. Arterial blood was withdrawn from the radial artery for % HbO_2 and SaO_2 determination with CO-oximeter. The differences of oximeter readings (SpO_2) from % HbO_2 were 0.5±2.1 (SD) in RF and 0.8±2.3 (SD) in OF, and those from SaO_2 were 0.1±2.0 in MF and 0.4±1.9 in NF. The SpO_2 in OF was 2.9±1.0 % lower than in MF (p<0.001). The mean difference between SaO_2 and %HbO_2 was 2.25±0.26(p<0.001). It was indicated that OF and RF reflected %HbO_2 in non-smokers, while MF and NF reflected SaO_2. Since each oximeter was differently calibrated, it will be necessary to pay attension to the meaning of its reading for clinical monitoring.
日本医療機器学会の論文
1988-08-01