手指型血氧機之血氧飽和度準確性調查   全文下載

Investigation on the Accuracy of Blood Oxygen Saturation of Fingertip Pulse Oximeter

自108年來，新冠肺炎（COVID-19）肆虐全球，其中部分患者出現「快樂缺氧（Happy Hypoxia）」的症狀，係指患者的血氧濃度已低於正常範圍（正常值為95-100%），但卻沒有感受到明顯的異樣或不適，因此也容易造成延誤就醫，進而危及生命。有鑑於此，能提供即時且連續性的非侵入性血氧監測的血氧機逐漸成為居家照護患者的必備防疫物資。血氧機原理是根據含氧血紅素及去氧血紅素對不同波長的光吸收度有差異，經由擷取人體血液中含氧血紅素及去氧血紅素個別的濃度變化訊號，經由量測特定波長光源（660 nm之紅光及940 nm之紅外光）的吸收值，可以計算出兩種血紅素的比例進而推算出血氧飽和度。本調查依據原廠規格測試市售手指型血氧機之SpO2準確度，共計完成11件市售國產、輸入及陸輸血氧機的測試，結果均符合原廠規格。

The COVID-19 pandemic has ravaged the world since 2019 and some of the patients showed“Happy Hypoxia Symptoms“with blood oxygen concentration below the normal value of 95-100%. The patients usually do not feel obvious abnormality or discomfort, so it is easy to delay medical treatment and thus endanger life. In view of this, fingertip blood oxygen oximeter, which can provide real-time and continuous non-invasive blood oxygen monitoring, has become essential personal protective equipment for home care patients. The principle of the oximeter is based on the physical phenomenon that the oxygenated hemoglobin and deoxygenated hemoglobin in human blood revealed different absorption rate at different wavelengths. Two specific wavelengths of 660 nm red light and 940 nm infrared light may be selected, the absorption rates at these two wavelengths can then be used to calculate blood oxygen concentration. This study used factory specifications for testing the accuracy of commercially available fingertip pulse oximeters. Eleven samples from domestic, imported and China imported fingertip pulse oximeters were tested and the results showed all in compliance with the manufacturer’s specifications.