Adaptive Servo-Ventilation in "Real Life" Conditions : the OTRLASV Study

Inclusion Criteria: * Written informed consent * Age more than 18 years (inclusive) * Patient treated with ASV for at least one year,and eligible for care and for the reimbursement by the French Social Security rules. * Patient presenting at the annual control consultation for the continuation of the ASV treatment according to the French Social Security rules. Exclusion Criteria: * Pregnancy, intention of being pregnant, breastfeeding. * Inability to understand the nature and aims of the study or to communicate with the investigator * Simultaneous participation in another trial with an exclusion clause to participate to an other trial. * No affiliation to the French social security * Loss of personal capacity resulting in state protection * Deprivation of liberty by judicial or administrative decision