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The idea of this study is to demonstrate that the position of the head at a comfort height spontaneously expressed by the patient, between Jackson's amended position or Ramp position, significantly improves the quality of the intubation gesture. This patient position can be easily achieved by placing a compressed air mattress under the patient's trunk - AirPal RAMP ™ mattress.

Thus the investigators can assume that the appropriate positioning and use of a video laryngoscope (McGrathR Mac) places the patient in the best anatomical configuration to breathe and, indirectly to facilitate control of the airways, especially for those with a risk of difficult airway management.

1. Position for orotracheal intubation The period preceding the administration of anesthetic agents is essential to ensure a satisfactory oxygen supply (pre-oxygenation). Then, once loss of consciousness is achieved, an interface (oral intubation probe) is put in place to allow mechanical ventilation during the procedure. This phase can be marked by a more or less expected difficulty depending on the risk factors presented by the patient. Thus an Arne score> 11 is predictive of a potential difficulty which may lead to an alternative technique being proposed. Simple techniques also exist in the patient setup to reduce the incidence of difficulties. Among them, the placement of a cushion under the head with a slight extension of the head of 20 ° (Jackson's amended position) is recommended because it allows to obtain the alignment of the posterior pharyngeal and glottic spaces. This patient position can be easily achieved by placing a compressed air mattress under the patient's trunk - AirPal RAMP ™ mattress.

   This optimization of the position according to the patient, between Jackson's amended position or Ramp position, opens up the prospect of defining an optimal position personalized to each patient. Thus, it can be assumed that the appropriate positioning places the patient in the best anatomical configuration for breathing and, indirectly, to facilitate control of the airways.

2. Video laryngoscope The use of a video laryngoscope (McGrathR Mac) is becoming widespread in anesthesia, especially for the management of patients at risk of difficult airway management. This device by the video support at the end of the blade provides a better visualization of the glottic orifice.

3. The hypothesis of this research The idea of this study is to demonstrate that the position of the head at a height of comfort spontaneously expressed by the patient significantly improves the quality of the intubation procedure.

Inclusion Criteria:

• Men or women over 18 and under 80;
• Must undergo general anesthesia with oral intubation using a standard intubation probe;
• Can be contacted directly by telephone if they are patients treated in outpatient surgery;
• Having signed a consent form;
• Being affiliated to a Health Insurance scheme.

Exclusion Criteria:

• pregnant or breastfeeding patients;
• patients with a predicted difficulty in mask ventilation or intubation according to the assessment of the doctor who performs the clinical examination prior to inclusion (Arne score ≥ 11) or the one who takes care of the patient in the block operative;
• patients for whom the surgery requires the placement of a double-lumen tube;
• patients requiring rapid sequence induction;
• patients for whom induction cannot be carried out by the sufentanil, propofol, atracurium or rocuronium sequence.