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Open Access Comparison of Lactate, Base Excess, Bicarbonate, and pH as Predictors of Mortality after Severe Trauma in Rhesus Macaques (Macaca mulatta)

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Social group housing of rhesus macaques at biomedical facilities is advocated to improve the psychologic wellbeing of these intelligent and social animals. An unintended outcome of social housing in this species is increased intraspecific aggression resulting in cases of severe multiple trauma and posttraumatic shock. The metabolic correlates of oxygen debt are likely important quantifiers of the severity of posttraumatic shock and may serve as useful guides in the treatment of these cases. The purpose of this retrospective study was to evaluate venous blood lactate, base excess, bicarbonate, and pH as predictors of mortality. These 4 variables were assessed in 84 monkeys with severe traumatic injury and shock. Data were available from blood samples collected prior to resuscitation therapy and the day after resuscitation therapy. The pre- and postresuscitation therapy levels of the variables then were tested for association with 6-d survival. When measured prior to resuscitation therapy, all variables were strongly correlated with each other and had a statistically significant association with survival. No single variable had both strong specificity and high sensitivity when measured prior to resuscitation therapy. Survival analysis showed that as the number of categorical indicators of acidosis increased, 6-d survival decreased. Analysis of the 4 variables after resuscitation therapy indicated that lactate was the only variable significantly associated with survival in our study.

Document Type: Research Article

Affiliations: 1: Oregon National Primate Research Center, Oregon Health and Sciences University, Beaverton, Oregon. 2: Oregon National Primate Research Center, Oregon Health and Sciences University, Beaverton, Oregon

Publication date: 2010-06-01

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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