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Before EN initiation, Hemodynamic should be stabilized with MAP>65 mmHg and lactate<4 mmol/l, or vasopressor dose was decreasing. GI function was then evaluated with the AGI staging system. For pateints with AGI of I, EN could be started at 25 ml/h. For patients with AGI II-III, predigested EN could be started at 10–15 ml/h. EN was withheld for those with AGI IV. If patients were at high risk of malnutrition, parenteral nutrition (PN) should started.
