| Clinical Evaluation of Pulse Oximetry in ICU Patients. |
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Kyeong Tae Min, Shin Ok Koh, Won Oak Kim, Hung Kun Oh |
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Department of Anesthesiology, Yonsei University College of Medicine, Seoul, Korea. |
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| Abstract |
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Continuous assessment of arterial oxygenation is important in the clinical management of critically ill patients.
Analysis of arterial blood gas is reliable but is invasive and only provides intermittent informations. In order to determine the accuracy of pulse oximeters in ICU patients, arterial oxygen saturation was measured in 58 patients in ICU using two kinds of pulse oximeters (Ohmeda, CSI), while simutaneously analyzing arterial blood gases. The relationship between the pulse oximeters saturation (SpO2) and arterial oxygen saturation (SaO2) was evaluated, Group l consisted of 102 samples of SpO2 using an Ohmeda pulse oximter in 45 of 72 patients. Group ll included 102 samples of SpO2 using a CSl pulse oximeter in 45 of 72 patients.
Both Ohmeda and CSI pulse oximeters were applied to 32 patients. Group lll had 204 samples, thE Sum of Groups l and ll. The results were as follow ; 1) The correlation coefficients of SpO2 to SaO2 in Groups l, ll and lll were 0.97, 0.90 and 0.96 (p < 0.775). 2) Mean difference between SaO2 and SpO2 in Groups l, ll and lll were almost within the limit of 1%. 3) The correlation coefficient of SpO2 between Ohmeda andcsr pulse oximeter was 0.79, and there was no mean difference between them in the 32 patients who were tested with both the Ohmeda and the CSI pulse oximeters. In conclusion, a pulse oximter is an accurate noninvasive device which assesses arterial oxygenation and provides information continuously. Wider clinical indication will follow. |
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