Assessment of OHIR Score to Predict a Prolonged Intensive Care Unit Stay for Adult Patients Undergoing Cardiac Surgery With Cardiopulmonary Bypass

A prolonged stay in intensive care unit (ICU) after cardiac surgery with cardiopulmonary bypass increases not only cost of patient care but also morbidity and mortality of patients. The ability to predict which patient has the tendency to have a prolonged ICU stay would help in patient and resource management of the hospital. There are many predictive models aiming at identifying patient at risk of prolonged ICU stay after cardiac surgery with cardiopulmonary bypass but almost all involve the preoperative assessment for proper resource management with one model, Open-Heart Intraoperative Risk (OHIR) Scoring concerning intraoperative manipulatable risk factors to improve anesthetic care and patient outcome. The OHIR model comprises 6 risk factors, 5 of which can be managed intraoperatively, with total score of 7 and a score of ≥ 3 indicating a likely prolonged ICU stay. The objective of this study was to re-validate the performance of OHIR score in the recent context.