Efficacy of Nasal Oxygen Therapy to Reduce Postoperative Complications in Ankle Trauma Surgery in At-risk Patients: a Randomized Pilot Study.

Inclusion Criteria: * Patient over 18 years of age * Patient with an ankle joint injury with surgical indication * Patient with at least one risk factor for scar complication such as comorbidity(ies) (diabetes, smoking, peripheral neuropathy, obstructive arterial disease of the lower limbs, microangiopathy, treatment influencing healing (chemotherapy, corticosteroids...)) and/or complex fracture * Patient affiliated to a social security system * Patient having signed an informed consent Exclusion Criteria: * Patient with chronic respiratory insufficiency * Patient with sleep apnea with equipment * Patient under long term oxygen therapy * Patient with a bilateral ankle fracture * Polytrauma patients * Pregnant or breastfeeding women or those refusing effective contraception * Patient deprived of liberty or under legal protection (guardianship or curatorship) * Patient unable to follow the protocol, as judged by the investigator * Patient refusing to participate in the study