Nomogram for intraoperatively acquired pressure injuries in children undergoing cardiac surgery with cardiopulmonary bypass: a retrospective study

Abstract

Background We aimed to develop and validate a nomogram for predicting the risk of intraoperatively acquired pressure injuries (IAPIs) in children undergoing cardiac surgery with cardiopulmonary bypass (CPB). Methods This study retrospectively included 208 children aged 21 days to 8 years who underwent cardiac surgery with CPB in a tertiary hospital in China between January 2020 and October 2023. All patients’ data were collected from the hospital’s medical record system and randomly divided into the training ( n = 146) and validation ( n = 62) cohorts by a ratio of 7:3. Logistic regression analysis was conducted in the training cohort to identify independent risk factors and establish the nomogram. Finally, calibration curves, receiver operating characteristic (ROC) curves, and decision curve analysis (DCA) were performed in both cohorts to validate the predictive ability of the nomogram. Results 43 (14.7%) children developed IAPIs. Multivariate analysis showed that low Braden Q scores, use of steroids, skin abnormalities, and low intraoperative SpO 2 were independent risk factors for IAPIs. A nomogram integrating the 4 factors was established. The areas under the curve (AUCs) of the nomogram were 0.836 and 0.903 in the training and validation cohorts, respectively. Furthermore, calibration curves and DCA demonstrated good calibration and clinical applicability of the nomogram. Conclusion We constructed a reliable nomogram based on specific risk factors for children undergoing cardiac surgery with CPB, which could be used as an effective and convenient tool for prevention of IAPIs. Supplementary Information The online version contains supplementary material available at 10.1186/s12887-024-04989-4.