STUDY OBJECTIVE: Crotalidae Polyvalent Immune Fab (CroFab; FabAV) antivenom prevents a decrease in perfusion pressures in intramuscular crotaline @entity5900 compared with normal saline solution. METHODS: We used a randomized, blinded, controlled acute animal preparation. Twenty anesthetized and instrumented @entity1707 were injected intramuscularly with 6 mg/kg Crotalus atrox venom into the anterior tibialis muscle of each hind limb (time 0). One hour after @entity5900 (time 1 hour), animals were randomized to receive 8 vials of reconstituted FabAV or an equal volume of normal saline solution (control) through a central venous line. The main outcome variable was the area under the perfusion-time curve (AUC) of the anterior compartment of the hind limb measured from time 1 hour to time 8 hours. Perfusion pressure was defined as mean arterial pressure-compartment pressure. Additionally, physiologic variables, including pulse rate, prothrombin time, fibrinogen level, platelet count, @entity7825 level, and hematocrit level, were monitored. RESULTS: Venom injection resulted in a decrease in average perfusion pressures from 54.1 mm Hg (time 0) to 31.7 mm Hg (time 1 hour). Comparison of AUC between groups from time 1 hour (time of treatment) to the completion of the study at time 8 hours revealed a 57% greater AUC in animals that received FabAV (mean+/-SD: 211.1+/-67.9 versus 134.5+/-55.8 mm Hg/h; P =.036; 95% confidence interval for difference 5.9 to 147.3). Comparison of the time curves for the mean prothrombin time from time 1 hour to the completion of the study by means of repeated-measures analysis of variance revealed a significant increase in the control group (P =.02). No significant difference was detected in the time curves for the means of mean arterial pressure, compartment pressure, pulse rate, @entity7825 level, hematocrit level, fibrinogen level, or platelet count over the course of the study. FabAV was found to significantly increase survival time when compared with the effect of the normal saline solution control from time 1 hour to time 8 hours, as determined by means of Kaplan-Meier estimation and the log-rank test (P =.029). CONCLUSION: FabAV limits the decrease in perfusion pressures in the anterior leg compartment after intramuscular crotaline venom injection in @entity1707 compared with saline solution. In addition, FabAV might prevent the development of @entity1003 and increase survival time in this model.

Crotalidae polyvalent immune Fab antivenom limits the decrease in perfusion pressure of the anterior leg compartment in a porcine crotaline XXXX model.

@entity1707 :: ('9823', 'Species') :: ['swine'] @entity7825 :: ('100323610(Tax:9823)', 'Gene') :: ['hemoglobin'] @entity1003 :: ('MESH:D001778', 'Disease') :: ['coagulopathy'] @entity5900 :: ('MESH:D012909', 'Disease') :: ['envenomation']
@entity5900 :: (MESH:D012909,Disease) :: ['envenomation']
