The aim of this Triple blind randomized clinical trial is comparing the effect of Metoclopramide , Neostigmine and combination of Metoclopramide and Neostigmine on gastric residual volume in mechanically ventilated ICU patients.
90 patients, who qualified for study entry, randomly allocate in three equal 30patients intervention groups. The first group receives 2.5mg Neostigmine, the second group receives 10 mg Metoclopramide and the third group receives both of them in 100 cc Normal Saline infused at 30 minutes. Then gastric residual volume will be checked 0, 3, 6, 9 and 12 hours after intervention. Also heart rate, blood pressure, Na, K, Mg, Hb, WBC, albumin and SOFA are measured before intervention.