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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: BACKGROUND, RESULTS. Meshes: Acidosis, Lactic, Analysis of Variance, Animals, Blood Gas Analysis, Disease Models, Animal, Heat Stress Disorders, Heat-Shock Proteins, Interleukin-1, Lactates, Male, Rats, Rats, Sprague-Dawley, Reference Values, Shock, Septic, Survival Rate, Tumor Necrosis Factor-alpha.
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Is heat stress associated with decreased lactic acidemia in rat sepsis? Context: Elevated plasma lactate has been shown to correlate with mortality in patients with septic shock. Heat stress prior to sepsis has resulted in reduction in acute lung injury and mortality. We investigated whether heat stress resulted in decreased plasma lactate concentration and protected the lung by decreasing the inflammatory response to sepsis. Plasma lactate concentration was elevated in septic rats without prior heat stress. Lactic acid levels were significantly lower in heat-treated septic rats (P < 0.05) and were not significantly different when compared with control rats. Septic rats with or without heat pretreatment had significantly higher myeloperoxidase activity in the lung than did control groups. Heat pretreatment did not prevent neutrophil infiltration or inflammatory mediator production in the lung.
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Prior heat stress ameliorates lactic acidemia in rat sepsis. Heat stress did not attenuate the pulmonary inflammatory process. The mechanism of heat-induced protection from lactic acidemia in sepsis needs to be further explored. Final Decision: yes