Optimal SpO<sub>2</sub> value and ability of 3 pulse oximeters to detect hypoxemia (SaO<sub>2</sub>≦90%).
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The sensitivity, specificity, positive predictive values, and negative predictive values of each pulse oximeter to detect hypoxemia are shown with the calculated optimal SpO2 value to detect hypoxemia. PPV positive predictive values, NPV negative predictive values Sensitivity = (patients with SaO2< = 90 and SpO2< = 90) / (patients with SaO2< = 90) Specificity = (patients with SaO2>90 and SpO2>90) / (patients with SaO2>90) PPV = (patients with SaO2< = 90 and SpO2< = 90) / (patients with SpO2< = 90) NPV = (patients with SaO2>90 and SpO2>90) / (patients with SpO2>90) #Optimal SpO2 represents the best compromise between sensitivity and specificity to detect hypoxemia (SaO2≦90%) Optimal SpO2 value and ability of 3 pulse oximeters to detect hypoxemia (SaO2≦90%).
