ArticleSultan Qaboos University medical journal2025
Utility of Carboxyhemoglobin Level for the Diagnosis of Invasive Bacterial Infection in a Febrile Neonate at Paediatric Emergency Department.
Article in Sultan Qaboos University medical journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: Carboxyhaemoglobin (COHb), which represents the fraction of carbon monoxide bound to haemoglobin, is available as a point-of-care test in the emergency department. This study aimed to assess the role of COHb in the diagnosis of invasive bacterial infections (IBI) in a paediatric emergency department. Methods: This retrospective study examined a single reading of venous COHb values in otherwise healthy neonates who presented with febrile illness at the paediatric emergency department at Royal Hospital, Muscat, Oman, between December 2019 and December 2022. The optimal COHb level for the diagnosis of IBI was determined using receiver operating characteristic curve analysis. Multivariate regression analysis was applied to assess the effect of age, birth weight and sex as cofounders for the diagnosis. Results: A total of 336 neonates presented to the paediatric emergency department with febrile illnesses and 201 neonates met the inclusion criteria; 43 neonates were culture-confirmed to have IBI. A COHb level ≥1.4% carries a sensitivity of 74% and a specificity of 69% for the diagnosis of IBI. Moreover, it was strongly independent of the diagnosis when adjusted for the confounding factors of birth weight, sex, pediatric early warning score, type of admission and gestational age (odds ratio = 6.080, 95% confidence interval: 2.810-13.155; Conclusion: This is the first study to examine COHb as a biomarker for IBI in a pediatric emergency setting. COHb may be a useful biochemical marker for risk stratification in febrile neonates. Further studies are required to better delineate its clinical utility.
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