The investigators primary objective of this prospective monocentric study is to evaluate the efficacy (patient comfort) of lidocaine 5 % spray versus placebo (physiologic serum) before NGT insertion in patient needing enteral nutrition, using visual analogue scale. Secondary objectives are to evaluate nurse and patient satisfaction using questionnaires, facility of NGT insertion using Likert scale, numbers of try, time of procedure, complications like tracheal insertion and success of the insertion using thorax x-ray.