The aim of this double blind randomized clinical trial is to compare the effect of Metoclopramide and Neostigmine on gastric residual volume in mechanically ventilated ICU patients.
60 patients, who are qualified for study entry, randomly allocate in two equal 30patients intervention groups. The first group receives 2.5mg Neostigmine and the second group receives 10 mg Metoclopramide in 100 cc Normal Saline which 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. After collecting and classifying of information, data will be analyzed with SPSS19.