Key result
Integrated Pulmonary Index predicts PACU hypoxemia in elderly patients with an AUC of ~0.84.
Why the study?
Elderly patients face an increased risk of PACU hypoxemia after general anesthesia, and the predictive value of the Integrated Pulmonary Index in identifying them needed investigation.
Does the Integrated Pulmonary Index (IPI) predict PACU hypoxemia in elderly patients after general anesthesia?
Does the Integrated Pulmonary Index (IPI) predict PACU hypoxemia in elderly patients after general anesthesia?
The Integrated Pulmonary Index (IPI) is an independent predictor of post-anesthesia care unit hypoxemia in elderly patients after general anesthesia, with an optimal cut-off value of 7.5.
May support IPI monitoring in elderly PACU patients; hypothesis-generating and requires prospective validation.
Aims/Background Elderly patients are at increased risk of hypoxemia in the post-anesthesia care unit (PACU) after general anesthesia. The Integrated Pulmonary Index (IPI) may have predictive value in identifying these patients. This study aimed to investigate the predictive value of the IPI for PACU hypoxemia in elderly patients after general anesthesia. Methods A retrospective analysis was conducted on 276 patients who underwent general anesthesia surgeries at Zhongshan Hospital, Fudan University, between December 2021 and December 2024. Patients were divided into a PACU hypoxemia group (n = 96) and a non-PACU hypoxemia group (n = 180). Univariate and binary logistic regression analyses were used to determine influencing factors, and a receiver operating characteristic (ROC) curve analysis was conducted to evaluate the predictive value of IPI for PACU hypoxemia in elderly patients after general anesthesia. Results Binary logistic regression analysis revealed that IPI was an independent influencing factor of PACU hypoxemia in elderly patients (p < 0.05). ROC analysis showed that IPI had an area under the curve of 0.843 (95% confidence interval [CI]: 0.799–0.887, p = 0.002), with a standard error of 0.023, a Youden index of 0.58, sensitivity of 85.42%, specificity of 72.22%, and an optimal cut-off value of 7.5. The discharge rate of patients with IPI >7.5 was significantly higher than that of patients with IPI ≤7.5 (p < 0.05). Conclusion IPI demonstrates a certain predictive value of PACU hypoxemia in elderly patients after general anesthesia.
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Zhao et al. (2025) studied this question. The Integrated Pulmonary Index (IPI) predicted PACU hypoxemia in elderly patients with an AUC of 0.843, sensitivity of 85.42%, and specificity of 72.22%.
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