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Korean J Crit Care Med > Volume 27(4); 2012 > Article
Korean Journal of Critical Care Medicine 2012;27(4): 224-229. doi: https://doi.org/10.4266/kjccm.2012.27.4.224
고젖산혈증 또는 중증 장기부전이 없는 패혈성 쇼크 환자의 예후 분석
성균관대학교 의과대학 삼성서울병원 응급의학과, *호흡기내과
Favorable Outcomes in Septic Shock Patients without Hyperlactatemia or Severe Organ Failure
Sung Jong Roh, Tae Gun Shin, Kyeongman Jeon, Gee Young Suh, Min Seob Sim, So Yeon Lim, Mun Ju Kang, Keun Jeong Song, Yeon Kwon Jeong, Ik Joon Jo
1Department of Emergency Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. drjij@skku.edu
2Division of Pulmonary and Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
BACKGROUND: Septic shock is a pathophysiologic state of circulatory failure with tissue hypoperfusion. However, it is usually defined as sepsis-induced hypotension not responding to fluid resuscitation, regardless of the objective findings of tissue hypoperfusion such as lactic acidosis or organ failures. Numerous patients with sepsis-induced hypotension present to the emergency department without hyperlactemia or severe organ failure. Hence, we investigated the clinical characteristics and outcomes of patients with septic shock according to the presence of hyperlactatemia or significant organ failure. METHODS: We conducted a retrospective observational study of adult patients presenting with septic shock in the emergency department of a tertiary care hospital between August 2008 and July 2010. Initial serum lactate was categorized low (<2.5 mmol/L) and high (> or =2.5 mmol/L). Organ failure was assessed by the Sequential Organ Failure Assessment (SOFA) score. Primary outcome measurement was in-hospital mortality. RESULTS: A total of 227 patients were enrolled. There were 88 (38.8%) patients in the low lactate group, and 139 (61.2%) patients in the high lactate group. Patients with low lactate levels showed a lower mortality rate (6.8% compared with 25.1% of those with high lactate level). The low lactate group showed less rapid heart rate, less severe organ failures and shorter length of stay in the intensive care unit. During the early goal-directed therapy, they required a smaller amount of fluid administration and a lower dose of norepinephrine although other hemodynamic variables were similarly maintained. In particular, if patients showed less severe organ dysfunction (SOFA score < 8) in the low lactate group (n = 45), in-hospital mortality was 0% (adjusted mortality was 1.3% [95% confidence interval = 0.3-5.0]). CONCLUSION: Patients with septic shock, who were enrolled according to the traditional definition, showed a very favorable outcome if they did not have hyperlactatemia or significant organ failure.
Key Words: lactate; mortality; sepsis; septic shock
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