Optimal SpO₂ value and ability of 3 pulse oximeters to detect hypoxemia (PaO₂≦60 mmHg).

<p>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.</p><p><i>PPV</i> positive predictive values, <i>NPV</i> negative predictive values</p><p>Sensitivity = (patients with PaO₂< = 60 and SpO₂< = 90) / (patients with PaO₂< = 60)</p><p>Specificity = (patients with PaO₂>60 and SpO₂>90) / (patients with PaO₂>60)</p><p>PPV = (patients with PaO₂< = 60 and SpO₂< = 90) / (patients with SpO₂< = 90)</p><p>NPV = (patients with PaO₂>60 and SpO₂>90) / (patients with SpO₂>90)</p><p>^#Optimal SpO₂ represents the best compromise between sensitivity and specificity to detect hypoxemia (PaO₂≦60 mmHg)</p><p>Optimal SpO₂ value and ability of 3 pulse oximeters to detect hypoxemia (PaO₂≦60 mmHg).</p

Calculated biases between SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer [ABL 825]) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters).

<p>The calculated mean biases (SpO2—SaO2) measured by 3 pulse oximeters for the 85%–100% saturation range are shown. Data are presented as the mean ± SD and analyzed by one-way analysis of variance followed by Tukey’s test.</p><p>*p<0.0001 vs. Nihonkohden OLV-3100 and Nellcor N-BS</p><p>Calculated biases between SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer [ABL 825]) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters).</p

Demographics and laboratory data of the patients.

<p>The demographics and results of blood gas sampling obtained immediately after arterial catheter placement are shown. Data are presented as the means ± SD.</p><p><i>SaO</i>_<i>2</i> oxyhemoglobin saturation measured by blood gas analyzer (ABL 825), <i>PaO</i>_<i>2</i> partial pressure of oxygen in arterial blood, <i>PaCO</i>_<i>2</i> partial pressure of arterial carbon dioxide, <i>Hb</i> hemoglobin</p><p>Demographics and laboratory data of the patients.</p

Calculated biases between SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer [ABL 825]) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters) among 5 healthy volunteers.

<p>The calculated mean biases (SpO2—SaO2) measured by 3 pulse oximeters are shown. Data are presented as the mean ± SD.</p><p>Calculated biases between SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer [ABL 825]) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters) among 5 healthy volunteers.</p

Optimal SpO₂ value and ability of 3 pulse oximeters to detect hypoxemia (SaO₂≦90%).

<p>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.</p><p><i>PPV</i> positive predictive values, <i>NPV</i> negative predictive values</p><p>Sensitivity = (patients with SaO₂< = 90 and SpO₂< = 90) / (patients with SaO₂< = 90)</p><p>Specificity = (patients with SaO₂>90 and SpO₂>90) / (patients with SaO₂>90)</p><p>PPV = (patients with SaO₂< = 90 and SpO₂< = 90) / (patients with SpO₂< = 90)</p><p>NPV = (patients with SaO₂>90 and SpO₂>90) / (patients with SpO₂>90)</p><p>^#Optimal SpO₂ represents the best compromise between sensitivity and specificity to detect hypoxemia (SaO2≦90%)</p><p>Optimal SpO₂ value and ability of 3 pulse oximeters to detect hypoxemia (SaO₂≦90%).</p

Calculated biases between SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer [ABL 825]) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters) among patients under room air condition.

<p>The calculated mean biases (SpO2—SaO2) measured by 3 pulse oximeters for the 85%–100% saturation range are shown. Data are presented as the mean ± SD and analyzed by one-way analysis of variance followed by Tukey’s test.</p><p>*p<0.0001 vs. Nihonkohden OLV-3100 and Nellcor N-BS</p><p>Calculated biases between SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer [ABL 825]) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters) among patients under room air condition.</p

Bland Altman plot comparing SaO₂ (oxyhemoglobin saturation measured by blood gas analyzer (ABL 825)) and SpO₂ (oxyhemoglobin saturation measured by 3 pulse oximeters).

<p>For each data point, the mean value ([SpO_<b>2</b> +SaO_<b>2</b>]/ 2) is presented on the x-axis, and the difference value (SpO_<b>2</b>—SaO_<b>2</b>) on the y-axis. <i>Black lines</i> represent the 95% confidence interval for SpO_<b>2</b> [bias ± 2 standard deviation (SD)]. The mean difference value (SpO_<b>2</b>—SaO_<b>2</b>) represents the bias, and SD represents the precision. Oximeters are: A. Nihonkohden OLV-3100, B. Nellcor N-BS, and C. Masimo Radical. Bias was 0.19% +/- 1.79% (mean +/- SD) by Nihonkohden oximeter, 0.18% +/- 1.64% by Nellcor oximeter, and 1.61% +/- 1.93% by Masimo oximeter.</p