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Persistent sepsis-induced hypotension without hyperlactatemia: is it really septic shock?
Glenn Hernandez1, Ricardo Castro, Carlos Romero
1Departamento de Medicina Intensiva, Pontificia Universidad Católica de Chile, Santiago, Chile. glennguru@gmail.com
Journal of Critical Care
|December 4, 2010
Summary
Septic shock patients without elevated lactate levels have significantly lower mortality and less organ dysfunction. This suggests hyperlactatemia may be a crucial criterion for diagnosing septic shock.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Biochemistry
Background:
- Hyperlactatemia is a known prognostic indicator in septic shock.
- Current septic shock definitions lack mandatory hyperlactatemia criteria, potentially misclassifying normolactatemic hypotensive patients.
- The clinical significance of sepsis-induced hypotension without hyperlactatemia remains unclear.
Purpose of the Study:
- To compare outcomes between septic shock patients with normal versus elevated lactate levels.
- To evaluate the implications of including hyperlactatemia as a mandatory diagnostic criterion for septic shock.
Main Methods:
- Retrospective analysis of 302 septic shock patients.
- Stratification of patients based on the presence or absence of hyperlactatemia.
Main Results:
- 34% of patients had septic shock without hyperlactatemia, exhibiting significantly lower mortality (7.7% vs. 42.9%).
- These normolactatemic patients had less severe organ dysfunction and higher central venous O2 saturation.
- Including hyperlactatemia as a criterion would decrease incidence by 34% but increase absolute mortality risk by 11%.
Conclusions:
- Sepsis-induced hypotension without hyperlactatemia may not represent true septic shock.
- The current definition of septic shock warrants review.
- Hyperlactatemia could serve as a valuable objective diagnostic criterion for septic shock.
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