Erratum: Concordance and limits between transcutaneous and arterial carbon dioxide pressure in emergency department patients with acute respiratory failure: a single-center, prospective, and observational study

ABSTRACT: After publication of this article (Scand J Trauma Resusc Emerg Med 23:40, 2015), it came to light that an earlier version had been published in error. This erratum contains the correct version of the article, which incorporates revisions made in response to reviewer comments. Additionally, one of the authors was inadvertently omitted from the author list. This author, Justin Yan, has been included in the corrected author list above. BACKGROUND: Transcutaneous CO(2) (PtCO(2)) is a continuous and non-invasive measure recommended by scientific societies in the management of respiratory distress. The objective of this study was to evaluate the correlation between PtCO(2) and arterial partial pressure of CO(2) (PaCO(2)) by arterial blood gas analysis in emergency patients with dyspnoea, and to determine the factors that interfere with this correlation. METHODS: From January to June 2014, all adult patients admitted to the RR with dyspnoea during business hours were included in the study if arterial blood gas measurements were indicated. A sensor measuring the PtCO(2) was attached to the ear lobe of the patient before the gas analysis. Anamnesis, clinical and laboratory parameters were identified. RESULTS: Ninety patients with dyspnoea were included (104 pairs of measurements). The median (IQR) age was 79 years (69 – 85). The correlation between PtCO(2) and PaCO(2) was R(2) =.83 (p<.001) but became lower for values of PaCO(2) above 60 mm Hg. The mean bias (± SD) between the two methods of measurement (Bland-Altman analysis) was −1.4 mm Hg (± 7.7) with limits of agreement from −16.4 to 13.7 mm Hg. In univariate analysis, PaO(2) interfered with this correlation. After multivariate analysis, temperature (OR = 3.01; 95 % CIs [1.16, 7.80]) and PaO(2) (OR = 1.22; 95 % CIs [1.02, 1.47]) significantly interfered with this correlation. CONCLUSIONS: There is a significant correlation between PaCO(2) and PtCO(2) values for patients admitted to the emergency department for acute respiratory failure. One limiting factor to routine use of PtCO(2) measurements in the emergency department is the presence of hyperthermia.