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Comparison of the OI and PaO2 /FiO2 score in evaluating PARDS requiring mechanical ventilation
Huili Shen1, Dong Qu1, Weilan Na1
1Department of Critical Medicine, Children's Hospital Affiliated to the Capital Institute of Pediatrics, Beijing, China.
Insights
The oxygenation index (OI) and arterial partial pressure of oxygen to fraction of inspired oxygen (PaO2/FiO2) ratio showed differences in grading pediatric acute respiratory distress syndrome (PARDS) severity. OI demonstrated higher accuracy when correlated with clinical outcomes and prognosis.
Area of Science:
- Pediatric Critical Care Medicine
- Respiratory Physiology
- Clinical Diagnostics
Background:
- Pediatric Acute Respiratory Distress Syndrome (PARDS) severity assessment is crucial for patient management.
- Existing metrics like the oxygenation index (OI) and PaO2/FiO2 (P/F) ratio have limitations in accurately reflecting disease severity.
- Comparative analysis of these oxygenation parameters is needed to optimize PARDS evaluation.
Purpose of the Study:
- To compare the efficacy of the oxygenation index (OI) and the PaO2/FiO2 (P/F) ratio in evaluating the severity of pediatric acute respiratory distress syndrome (PARDS).
- To determine which index better correlates with clinical outcomes and prognostic indicators in pediatric patients with ARDS.
Main Methods:
- Retrospective analysis of clinical data from PARDS patients over a 3-year period.
- Grading of PARDS severity using both the OI score and the P/F ratio.
- Correlation analysis of OI and P/F scores with the pediatric critical illness score, multiple organ dysfunction syndromes (MODS), ventilator pressure indexes, and patient prognosis.
- Receiver operating characteristic (ROC) curve analysis to assess diagnostic performance.
Main Results:
- Significant differences were observed between OI and P/F scores in grading PARDS severity (p < .05).
- Both OI and P/F scores showed consistency in identifying severe PARDS cases (24.6% vs. 25.6%).
- OI scores demonstrated a stronger correlation with the pediatric critical illness score, MODS, ventilator pressures, and patient prognosis compared to P/F ratio.
- ROC analysis indicated comparable areas under the curve (0.839 for OI, 0.853 for P/F) and sensitivity (0.854 for both), but OI had lower specificity (0.584 vs. 0.602 for P/F).
Conclusions:
- The oxygenation index (OI) and PaO2/FiO2 (P/F) ratio are consistent in classifying severe PARDS.
- The P/F ratio is suitable for rapid assessment in mild to moderate PARDS due to its simplicity.
- The OI score offers superior accuracy when integrated with prognostic factors for a comprehensive evaluation of PARDS severity.
Aim:
To examine the differences between oxygenation index (OI) and arterial partial pressure of oxygen to the fraction of inspired oxygen (PaO2 /FiO2 , [P/F]) in evaluating the severity of pediatric acute respiratory distress syndrome (PARDS).
Methods:
The severity of PARDS was graded by using the OI score and P/F ratio, respectively. The data including clinical indexes and prognosis indicators were recorded and analyzed.
Results:
During the 3-year study period, there were significant differences between OI and P/F scores in the severity grading of PARDS patients (p < .05). However, in severe diseases, both the scorings of OI and P/F were consistent (24.6% vs. 25.6%). The OI scores appeared more accurate when compared with P/F in the correlation between them and the pediatric critical illness score, multiple organ dysfunction syndromes (MODS), pressure indexes of ventilators and patients' prognosis. In the receiver operating characteristic curve, the critical values of OI and P/F were 8.42 and 144.71. Area under the curve of them were 0.839 and 0.853. The sensitivity values were both 0.854. The specificity values were 0.584 and 0.602.
Conclusions:
The OI and P/F were consistent in designating patients with severe PARDS. Among patients with mild to moderate diseases, the P/F could still be used for rapid determination given its simple calculation. Combined with the prognostic factors, the OI score was more accurate.
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