Evaluation of the Superficial Cervical Plexus Block in Oncological Throat and Neck Surgery

Inclusion Criteria: * Adult patient undergoing ENT cancer surgery with cervicotomy * Adult patient having received oral information from a doctor and signed written consent * Affiliation to a social security scheme, Universal Medical Coverage (CMU) Exclusion Criteria: * Patient refusal * Altered mental faculties or patient unable to give consent * Allergy to local anesthetics * Severe respiratory pathology (altered respiratory function tests with 50% \< FEV1 \< 80%, FEV1/FVC \< 70%, COPD stage 2 or more) * Preoperative SpO2 less than 92% in ambient air * Left heart failure NYHA 3 or more, impaired LVEF \< 30% or less * Lower respiratory infection in the month preceding surgery * History of ENT cancer surgery with cervical lymph node dissection * Pregnant or breastfeeding woman * Patient under AME * Patient under guardianship or reinforced curatorship * Participation in other interventional research