The study will be held in CHU Nice at nutrition unit support. After signed consentment, patients will be separate in two groups : group A (lidocaïne spray 5 %) and group B (physiologic serum). There will be 2 spray in nostril and 2 in orophagyngeal cavity 2 minutes before NGT insertion, which will be done by a competent nurse. Vital signs will be noted at the beginning of the procedure and 10 minutes after. At the end, the nurse and the patient will have to answer a questionnaire. Pain will be grade using visual analogue scale immediately after the procedure. Demographic data and complications will be note by the investigator. Finally, thorax X-ray will be done at the end of the procedure. There will be 34 patients by group. If the investigators find a benefit, this can change their practice and guidelines.