Relationship between EtCO2 and quality-parameters during cardiopulmonary resuscitation

Jesus M. Ruiz, Sofia Ruiz De Gauna, Digna M. Gonzalez-Otero, Mohamud Ramzan Daya, James K. Russell, J. J. Gutierrez, Mikel Leturiondo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationComputing in Cardiology Conference, CinC 2016
PublisherIEEE Computer Society
Pages957-960
Number of pages4
Volume43
ISBN (Electronic)9781509008964
StatePublished - Mar 1 2017
Event43rd Computing in Cardiology Conference, CinC 2016 - Vancouver, Canada
Duration: Sep 11 2016Sep 14 2016

Other

Other43rd Computing in Cardiology Conference, CinC 2016
CountryCanada
CityVancouver
Period9/11/169/14/16

ASJC Scopus subject areas

  • Computer Science(all)
  • Cardiology and Cardiovascular Medicine

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    Ruiz, J. M., De Gauna, S. R., Gonzalez-Otero, D. M., Daya, M. R., Russell, J. K., Gutierrez, J. J., & Leturiondo, M. (2017). Relationship between EtCO2 and quality-parameters during cardiopulmonary resuscitation. In Computing in Cardiology Conference, CinC 2016 (Vol. 43, pp. 957-960). [7868903] IEEE Computer Society.