Concordance between capnography and capnia in adults admitted for acute dyspnea in an ED

The American Journal of Emergency Medicine
Samuel DelermePatrick Ray

Abstract

End-tidal carbon dioxide pressure (etCO(2)) is widely used in anaesthesia and critical care in intubated patients. The aim of our preliminary study was to evaluate the feasibility of a simple device to predict capnia in spontaneously breathing patients in an emergency department (ED). This study was a prospective, nonblind study performed in our teaching hospital ED. We included nonintubated patients with dyspnea (> or =18 years) requiring measurement of arterial blood gases, as ordered by the emergency physician in charge. There were no exclusion criteria. End-tidal CO(2) was measured by an easy-to-use device connected to a microstream capnometer, which gave a continuous measurement and graphical display of the etCO(2) level of a patient's exhaled breath. A total of 43 patients (48 measurements) were included, and the majority had pneumonia (n = 12), acute cardiac failure (n = 8), asthma (n = 7), or chronic obstructive pulmonary disease exacerbation (n = 6). Using simple linear regression, the correlation between etCO(2) and Paco(2) was good (R = 0.82). However, 18 measurements (38%) had a difference between etCO(2) and Paco(2) of 10 mm Hg or more. The mean difference between the Paco(2) and etCO(2) levels was 8 mm Hg. Using t...Continue Reading

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Citations

Oct 9, 2015·Chest·Boulos S Nassar, Gregory A Schmidt
Jan 27, 2016·Annals of Emergency Medicine·Damien ViglinoMaxime Maignan
Jul 17, 2012·The American Journal of Emergency Medicine·Samuel DelermePatrick Ray
Jun 2, 2011·Anaesthesia·D K Whitaker
Jul 6, 2014·Emergency Medicine Journal : EMJ·Christopher L HunterLinda Papa
Jul 16, 2014·Expert Review of Respiratory Medicine·Ruben D RestrepoJonathan Waugh
May 18, 2017·Revista latino-americana de enfermagem·Francisco José Cereceda-Sánchez, Jesús Molina-Mula
Oct 6, 2020·Frontiers in Physiology·Rehan T JunejoJames P Fisher

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