In order to avoid an order effect, the patient acting as his own control, will randomly undergo a laryngoscopy with each laryngoscopes, the intubation being performed during the second laryngoscopy, here with the Laryngobloc ®.

In order to avoid an order effect, the patient acting as his own control, will randomly undergo a laryngoscopy with each laryngoscopes, the intubation being performed during the second laryngoscopy, here with the Disposable Metal Blade.

Group SU (Single Use or Laryngobloc ®): the first laryngoscopy is performed with the R and the second laryngoscopy and the intubation is performed with the Laryngobloc ®.

Group R (Reusable handle+ disposable metal blade): the first laryngoscopy is performed with the Laryngobloc ® and the second laryngoscopy and the intubation is performed with the R.

The quality of laryngoscopy. The quality of the visibility of the glottis, is assessed by the Cormack and Lehane grade. A rank of 1 or 2 will be considered a success for the analysis of results.

Evaluation microbiological (bacteria, fungi) and identification of bacteria with smears of the handle of laryngoscopes, the Laryngobloc ® and the reusable battery.

Evaluation of intubation: IDS score, satisfaction of the anesthesiologist, intubation time, quality of light offered by the device.