Accuracy of Pulse Oximeters in Detecting Hypoxemia in Patients with Chronic Thromboembolic Pulmonary Hypertension |
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| Authors: | Tomoki Kohyama Kiyoshi Moriyama Riichiro Kanai Mariko Kotani Kohji Uzawa Toru Satoh Tomoko Yorozu |
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| Affiliation: | 1Department of Anesthesiology, Kyorin University School of Medicine, Tokyo, Japan;2Division of Cardiology, Second Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, Japan;Nippon Medical School Graduate School of Medicine, JAPAN |
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| Abstract: | PurposePulse oximetry is routinely used to continuously and non-invasively monitor arterial oxygen saturation (SaO2). When oxygen saturation by pulse oximeter (SpO2) overestimates SaO2, hypoxemia may be overlooked. We compared the SpO2 - SaO2 differences among three pulse oximeters in patients with chronic thromboembolic pulmonary hypertension (CTEPH) who spent their daily lives in a poor oxygen state.ResultThe root mean square of each pulse oximeter was 1.79 (OLV-3100), 1.64 (N-BS), and 2.50 (Masimo Radical). The mean bias (SpO2 - SaO2) for the 90%–95% saturation range was significantly higher for Masimo Radical (0.19 +/- 1.78% [OLV-3100], 0.18 +/- 1.63% [N-BS], and 1.61 +/- 1.91% [Masimo Radical]; p<0.0001). The optimal SpO2 value to detect hypoxemia (SaO2≦90%) was 89% for OLV-3100, 90% for N-BS, and 92% for Masimo Radical.ConclusionWe found that the biases and precision with which to detect hypoxemia differed among the three pulse oximeters. To avoid hypoxemia, the optimal SpO2 should be determined for each pulse oximeter. |
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