End-Tidal CO2 (etCO2) and pH in the Correct Naso-gastric Tube Placement

"At the end of the procedure, therefore, for each patient two values of etCO2 are acquired which will allow to obtain two populations of values of the etCO2: the values at the endotracheal level and the esophageal level values. The authors will find the threshold value of etCO2 collected when the NGT is well positioned in trachea. The study manager is not directly involved in the measurement and recording of etCO2 values."

"At the end of the procedure, for each patient two values of pH are acquired which will allow to obtain two pH value populations: a value at esophageal level and a value at the gastric level. The authors will find the threshold value of pH collected when the NGT is positioned in the esophagus and in the stomach. The study manager is not directly involved in the measurement and recording of pH values."