J Korean Soc Emerg Med.  2018 Oct;29(5):493-499. 10.0000/jksem.2018.29.5.493.

Analysis of the association of serum potassium and lactic acid with neurologic outcome in out-of hospital post-cardiac arrest adult patients

• Lee YH
• Kim W
• Kang GH
• Jang YS
• Choi HY
• Kim JG

• KMID: 2435474
• DOI: http://doi.org/10.0000/jksem.2018.29.5.493

Abstract

OBJECTIVE
This study aimed to identify the effects of serum potassium and lactate on neurologic outcomes in out-of-hospital post-cardiac arrest adult patients.
METHODS
This study was a single center, retrospective observational study. We recruited out-of-hospital post-cardiac arrest adult patients admitted to an intensive care unit from 2011 to 2017. Primary outcome was good neurologic outcome at discharge. To evaluate the prognostic impact of serum potassium and lactate, univariate and multivariate logistic regression analyses were performed.
RESULTS
A total of 57 patients were included in this study. The number of patients with good neurologic outcome was 19 (33.3%). In the univariate analysis, good neurologic outcome patients showed a higher smoking rate, shorter pre-hospital transportation time, higher rate of percutaneous coronary intervention, and lower severity score (all p < 0.05). The good neurologic outcome patients also presented higher pH, lower partial pressure of carbon dioxide, and lower potassium regarding laboratory findings on the first hospital day (all p < 0.05). In the multivariate analysis, the independent factors favoring good neurologic outcome were pre-hospital transportation time (adjusted odds ratio [aOR], 0.82; 95% confidence interval [CI], 0.69-0.97; P=0.019) and lower partial pressure of carbon dioxide on the first hospital day (aOR, 0.95; 95% CI, 0.91-0.99; P=0.034).
CONCLUSION
Serum potassium and lactate were not significantly associated with good neurologic outcome in out-of-hospital post-cardiac arrest adult patients. The prognostic factors for good neurologic outcome were pre-hospital transportation time and initial partial pressure of carbon dioxide.

Keyword

Cardiopulmonary resuscitation; Heart arrest; Prognosis

MeSH Terms

Adult*
Carbon Dioxide
Cardiopulmonary Resuscitation
Heart Arrest
Humans
Hydrogen-Ion Concentration
Intensive Care Units
Lactic Acid*
Logistic Models
Multivariate Analysis
Observational Study
Odds Ratio
Partial Pressure
Percutaneous Coronary Intervention
Potassium*
Prognosis
Retrospective Studies
Smoke
Smoking
Transportation
Carbon Dioxide
Lactic Acid
Potassium
Smoke