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SMA blood flow during enteral arginine infusion for 3 h in TPN (A) and PEN (B) pigs i.g. infused with saline or arginine. Values are means ± SEM, n = 3–5 (TPN) or 5–7 (PEN). Baseline SMA blood flow in PEN pigs was 90% higher than in TPN pigs (P < 0.01). The mean baseline SMA flow in TPN and PEN groups is shown as dashed lines for comparison.
