TY - GEN
T1 - Relationship between EtCO2 and quality-parameters during cardiopulmonary resuscitation
AU - Ruiz, Jesus M.
AU - De Gauna, Sofia Ruiz
AU - Gonzalez-Otero, Digna M.
AU - Daya, Mohamud
AU - Russell, James K.
AU - Gutierrez, J. J.
AU - Leturiondo, Mikel
N1 - Publisher Copyright:
© 2016 CCAL.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Monitoring end-tidal carbon dioxide (EtCO2) is suggested as an indicator of cardiopulmonary resuscitation (CPR) quality since it reflects blood flow to the lungs. However, the relationship between EtCO2 and CPR quality parameters is poorly understood. In this study, we analyzed the EtCO2 linear relation with chest compression depth, chest compression rate, and ventilation rate. Six resuscitation episodes with the capnogram and the compression depth signal were selected to identify intervals with a stable EtCO2 value. The corresponding ventilation rate, compression depth and compression rate were annotated. Multiple linear regression was used to correlate EtCO2 changes with variations of CPR parameters, intra and inter-patient. Median (P25, P75) coefficient of determination R2 per patient was 0.86 (0.78, 0.89), decreasing to 0.64 when values were considered jointly. An increase of 1 ventilation per minute caused a decrease of 1.1 mmHg in EtCO2. An increase of 1 mm in depth caused an increase of 0.26 mmHg. Compression rate did not significantly influence the results. EtCO2 reflected CPR quality during resuscitation attempts, although the relationship between EtCO2 and CPR quality parameters varied between patients. The main explanatory variable was ventilation rate.
AB - Monitoring end-tidal carbon dioxide (EtCO2) is suggested as an indicator of cardiopulmonary resuscitation (CPR) quality since it reflects blood flow to the lungs. However, the relationship between EtCO2 and CPR quality parameters is poorly understood. In this study, we analyzed the EtCO2 linear relation with chest compression depth, chest compression rate, and ventilation rate. Six resuscitation episodes with the capnogram and the compression depth signal were selected to identify intervals with a stable EtCO2 value. The corresponding ventilation rate, compression depth and compression rate were annotated. Multiple linear regression was used to correlate EtCO2 changes with variations of CPR parameters, intra and inter-patient. Median (P25, P75) coefficient of determination R2 per patient was 0.86 (0.78, 0.89), decreasing to 0.64 when values were considered jointly. An increase of 1 ventilation per minute caused a decrease of 1.1 mmHg in EtCO2. An increase of 1 mm in depth caused an increase of 0.26 mmHg. Compression rate did not significantly influence the results. EtCO2 reflected CPR quality during resuscitation attempts, although the relationship between EtCO2 and CPR quality parameters varied between patients. The main explanatory variable was ventilation rate.
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M3 - Conference contribution
AN - SCOPUS:85016104189
T3 - Computing in Cardiology
SP - 957
EP - 960
BT - Computing in Cardiology Conference, CinC 2016
A2 - Murray, Alan
PB - IEEE Computer Society
T2 - 43rd Computing in Cardiology Conference, CinC 2016
Y2 - 11 September 2016 through 14 September 2016
ER -