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• W2087740996 abstract "Excessive release of nitric oxide has been implicated as being an important factor contributing to systemic arterial hypotension in septic shock. Hemoglobin is an effective nitric oxide scavenger. The purpose of this study was to test the hypothesis that treatment with cross-linked human hemoglobin can ameliorate systemic arterial hypotension and improve organ perfusion in a porcine model of normodynamic endotoxemic shock.Prospective, randomized, controlled trial.Laboratory at a university medical center.Fourteen, male, random-bred swine.All animals were challenged with Escherichia coli lipopolysaccharide (400 microg/kg) infused from t = 0 to 90 mins. Pigs in group 1 (n = 7) were infused with cross-linked human hemoglobin (150 mg/kg) at t = 30 mins. Pigs in group 2 (n = 7) were infused at t = 30 mins with 150 mg/kg of dextran (average molecular weight 70,000 daltons) as a 5% (weight per volume) solution.After infusion of endotoxin, mean arterial pressure decreased significantly (p < .05) but baseline cardiac index was maintained in both groups. In hemoglobin-treated pigs (group 1), mean arterial pressure was higher than in controls (group 2) from t = 60 to 120 mins (p < .05). There were no significant differences between the two groups in systemic vascular resistance index, renal blood flow, mesenteric blood flow, systemic oxygen delivery, or systemic oxygen extraction. Ileal mucosal blood flow was lower (p < .07) in group 1 than in group 2. Mean pulmonary arterial pressure increased relative to baseline in both groups, but was significantly greater in group 1 as compared with group 2. Compared with controls, infusion of hemoglobin significantly exacerbated endotoxin-induced arterial hypoxemia (p < .05).Treatment with hemoglobin improved mean arterial pressure in endotoxemic swine without significantly impairing blood flow to the renal or mesenteric vascular beds. Infusion of hemoglobin, however, significantly exacerbated endotoxin-induced pulmonary hypertension and arterial hypoxemia. Additional pharmacologic strategies may be necessary to ameliorate the potential adverse pulmonary effects of administering hemoglobin solutions to patients with sepsis." @default.
• W2087740996 created "2016-06-24" @default.
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• W2087740996 date "1996-05-01" @default.
• W2087740996 modified "2023-10-18" @default.
• W2087740996 title "Effect of human hemoglobin on systemic and regional hemodynamics in a porcine model of endotoxemic shock" @default.
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• W2087740996 doi "https://doi.org/10.1097/00003246-199605000-00014" @default.
• W2087740996 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/8706458" @default.
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