Objective: Near-infrared spectroscopy (NIRS) is frequently used to predict the return of spontaneous circulation (ROSC) and evaluate the oxygenation of organs. The aim of this study was to predict ROSC by assessing extremity oxygenation during cardiopulmonary resuscitation (CPR).
Methods: This prospective observational study was conducted between March 2019 and March 2020 at the emergency department (ED). The extremity and brain oxygen saturation data of patients with out-of-hospital cardiac arrest (OHCA) were collected from 66 patients aged >18 years who were transported to the ED by ambulance or by relatives due to non-traumatic OHCA. After excluding 40 patients, analysis was performed for the data of 26 patients who met the study inclusion criteria.
Results: The 26 patients included in the study comprised 11 males and 15 females with an average age of 65.27±12.44 years. ROSC was achieved in 15 patients. No statistically significant difference was found between the initial and final NIRS scores of patients without ROSC (p>0.05). A statistically significant difference was found between the initial and final NIRS scores at all measurement points in patients with ROSC (p<0.05). The initial and final NIRS values at all measurement points were significantly higher in patients with ROSC than in those without ROSC (p<0.05).
Conclusion: The return rate of spontaneous circulation was higher in patients with better extremity oxygenation and increased extremity oxygenation during CPR. Evaluating extremity oxygenation with NIRS during resuscitation can help predict ROSC in patients with OHCA.