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• W2324654493 abstract "Studies exploring the influence of obesity on septic shock remain limited and controversial. Pigs were chosen as a clinically relevant species, resembling to humans in various functions. We hypothesize obesity may impair porcine acute endotoxic shock. Four groups of five “Yucatan” minipigs were studied: lean and obese control groups, lean lipopolysaccharide (LPS) group receiving Escherichia coli endotoxin (LPS) and obese LPS group receiving the same endotoxin dose. We measured hemodynamic and oxygenation parameters, skin microvascular blood flow at rest and during reactive hyperemia, von Willebrand factor, tumor necrosis factor α, and interleukin 6. All measurements were performed at baseline and at 30, 60, 90, 150, and 300 min. Results were given as median with 25th to 75th interquartile range. Control groups remained stable during the study period. In LPS groups, administration of endotoxin resulted in a typical hypokinetic shock. In obese LPS group at 300 min, we observed a significant impairment of cardiac index (1.2 [1.06–1.45] vs. 1.7 [1.57–1.97] L/min per m2, P = 0.008) compared with the lean LPS group; moreover, pulmonary hypertension (mean arterial pressure: 42 [39–47] vs. 32 [28–34] mmHg, P = 0.008), hypoxemia (partial pressure of oxygen: 216 [178–262] vs. 325 [285–414] mmHg, P = 0.02), and lactate levels (5.8 [4.2–6.8] vs. 3.9 [2.2–5.5] mmol/L, P = 0.04) were significantly higher compared with the lean LPS group. Throughout the study, rest flow and peak flow during reactive hyperemia were more decreased in the obese LPS group. Compared with the lean LPS group, tumor necrosis factor α levels at 60 min (269 [178–428] vs. 126 [105–166] ng/mL, P = 0.03) and interleukin 6 levels at 300 min (101 [61–142] vs. 52 [36–64] ng/mL, P = 0.03) were significantly higher in the obese LPS group. In our model of endotoxic shock, obese pigs developed a more severe hemodynamic failure with pronounced microcirculatory dysfunction and proinflammatory response." @default.
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• W2324654493 date "2014-06-01" @default.
• W2324654493 modified "2023-10-14" @default.
• W2324654493 title "Impact of Endotoxin Challenge in Obese Pigs" @default.
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• W2324654493 doi "https://doi.org/10.1097/shk.0000000000000158" @default.
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