Abstract 14160: Correlation Between Regional Cerebral Oxygen Saturation (rSO2) and Arterial Blood Gas (ABG) During Cardiopulmonary Resuscitation
Introduction: It is not fully understood yet how we assess regional cerebral oxygen saturation (rSO2) in the patients under cardiopulmonary resuscitation (CPR). We aimed to clarify the correlation between rSO2 and arterial blood gas (ABG) in CPA patients.
Methods: This is a retrospective study of out-of-hospital cardiac arrest patients transferred to two tertiary emergency medical centers from 2012 to 2015. On arrival, rSO2 sensor was attached to the forehead of patients, and monitored continuously during CPR and after return of spontaneous circulation (ROSC). We compared correlation between rSO2 and ABG in ROSC patients and non-ROSC patients.
Results: There were 115 CPA patients transferred to the tertiary emergency medical centers, and 51 patients got ROSC and 64 patients did not. We could measure ABG in 41 patients in ROSC group and 40 patients in non-ROSC group. In ROSC patients, there was a moderate correlation between rSO2 and SaO2 (R2=0.462, p<0.001). However, there was no significant correlation between rSO2 and SaO2 in non-ROSC patients. Comparing in the population of normal SaO2 (> 95%), 71% of patients showed normal rSO2 (>60%) in ROSC patients, but only 14% in non-ROSC patients (p<0.05).
Conclusions: In ROSC patients, there is a correlation between rSO2 and SaO2, but not in non-ROSC patients. These results suggest that chest compression would not be enough for cerebral circulation in certain patients even if systemic oxygenation would be achieved.
- Cardiopulmonary resuscitation
- Return of spontaneous circulation (ROSC)
- Regional circulation
- Monitoring, physiologic
Author Disclosures: G. Tajima: None. T. Shiozaki: None. Y. Ogawa: None. T. Hirose: None. N. Mori: None. T. Ueki: None. H. Izumino: None. S. Yamano: None. T. Hirao: None. T. Inokuma: None. K. Yamashita: None. O. Tasaki: None.
- © 2016 by American Heart Association, Inc.