ISSN: 2149-2247 | E-ISSN: 2149-2549
Impaired Renal Function in Outpatients with Acute Carbon Monoxide Poisoning [Erciyes Med J]
Erciyes Med J. 2021; 43(1): 13-19 | DOI: 10.14744/etd.2020.52993

Impaired Renal Function in Outpatients with Acute Carbon Monoxide Poisoning

Nahide Ekici Gunay1, Aykut Kale2, Nurullah Günay1
1Department of Clinical Biochemistry, Kayseri City Training and Research Hospital, Kayseri, Turkey
2Department of Emergency Medicine, Erciyes University, Faculty of Medicine, Kayseri, Turkey

Objective: The study aims to investigate the incidence of early stage kidney disease in outpatients with acute carbon monoxide poisoning (CMP) and to assess whether the Chronic Kidney Disease Epidemiology Collaboration formula (CKD-EPI) values of these patients had any impact on the time taken for their discharge.
Materials and Methods: This retrospective case–control study consisted of a total of 94 patients (47 patients with carbon monoxide poisoning induced by exposure to incompletely burned coal, and 47 age-and sex-matched controls). Patient details including age, CKD-EPI value, hemoglobin, carboxyhemoglobin (COHb), lactate, pH, SaO2, pO2 pCO2, BE, HCO3, glucose, AST, ALT, amylase, ALP, BUN, creatinine, Na, K, Cl, CK, CK-MB, troponin, uric acid levels and duration of follow-up were recorded. The post-hoc power analysis was calculated using G*Power based on the difference between the two means by Wilcoxon–Mann–Whitney test. A Kaplan–Meier survival curve was plotted and test of equality of survival distributions for the different levels of CKD-EPI was compared.
Results: The mean age and mean COHb values of the study group were 37.24±12.91 and 21.45±9.89, respectively. The CKD-EPI values were lower in patients belonging to the CMP group (101.39±19.53) compared to the control group (114.92±14.81) (p=0.017), 92% power level, d=0.781, 95% confidence intervals (CI) on the difference between means (-23.01/-4.04). The duration of follow-up of patients with CMP was 29.04±9.7 hours. There was a significant relationship between the follow-up duration of patients with CMP in the emergency department and their CKD-EPI levels (Log-rank/Mantel–Cox, p<0.001).
Conclusion: CKD-EPI-values are reduced as a result of impaired renal function in outpatients with CMP in the early stages. Thus, long-term nephrology follow-up should be performed in outpatients diagnosed with CMP. Further investigations may be required to rule out possible chronic kidney disease (CKD) associated with impaired renal function induced by acute CMP.

Keywords: Acute toxicity, carbon monoxide poisoning; renal function; CKD-EPI; creatinine; uric acid

Nahide Ekici Gunay, Aykut Kale, Nurullah Günay. Impaired Renal Function in Outpatients with Acute Carbon Monoxide Poisoning. Erciyes Med J. 2021; 43(1): 13-19

Corresponding Author: Nahide Ekici Gunay, Türkiye
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