title: Hypoxanthine in lethal canine endotoxin shock.
abstract: Endotoxin shock was induced in Labrador retriever dogs by intravenous infusion of a lethal dose of Escherichia coli endotoxin (2 mg/kg body weight) over a three-hour period in order to study plasma hypoxanthine concentrations. The animals succumbed within 14 hours after start of the infusion. Terminally when aortic blood pressure dropped below 30 mm Hg and bradycardia had developed, the animals were resuscitated by external cardiac massage, artificial ventilation, and volume therapy. During shock no significant alteration of plasma hypoxanthine concentrations occurred. During the 12-minute period of resuscitation, however, hypoxanthine concentrations of both arterial and venous plasma increased rapidly compared to the initial values. The changes of the hypoxanthine concentration revealed an exponential pattern. The likely explanation for this phenomenon is is that during shock bypoxanthine was accumlated in the tissues due to tissue hypoxia and that the metabolite was washed out into the circulation during resuscitation.
mesh_terms: D000136:Acid-Base Equilibrium; D000818:Animals; D001794:Blood Pressure; D004285:Dogs; D007042:Hypoxanthines / Q000097:blood*; D012151:Resuscitation; D012772:Shock, Septic / Q000097:blood*
chemical_list: D007042:Hypoxanthines