Customized Masks in Non-Invasive Mechanical Ventilation

Inclusion Criteria: * Patient enrolled in the Home Mechanical Ventilation (HMV) program. * Adherence of \>4 hours per day. * In the case of COPD, inspiratory pressures \>18 cmH2O. * Users of a Resmed HMV device to standardize and facilitate the analysis of the respirator log. * Commercial masks (MC) in optimal condition, as assessed by the mechanical ventilation unit responsible during outpatient ventilation consultations. * Presence of residual leaks (\>5 LPM on average according to the respirator log - ResScan, unintentional leaks, with intentional leaks excluded by software). Exclusion Criteria: * Patients with tracheostomy or scheduled for tracheostomy. * Patients on a waiting list for lung transplantation. * Patients using HMV devices from manufacturers other than ResMed. * Users who alternate between various MC models, where homogeneity in interface use cannot be assured. * Refusal to provide consent. * Patients with documented allergies to components of medical-grade silicone used in the production of M3D. * Exacerbations requiring hospitalization or changes in medication or the respirator in the last 3 months.