Daily Socket Comfort in Transtibial Amputee With an Active Vacuum Suspension System

Inclusion Criteria: * Male or female over 18 years of age. * Unilateral transtibial amputation for more than 6 months. * Equipped for more than 3 months with a Seal-in™ liner without the vacuum suspension system. * Equipped with an ESAR(Energy Storing and Return) foot with the vacuum suspension system * Patient meeting the criteria of ICF(International Classification of Functioning, Disability and Health) classification d4602 and/or d4608 * Presenting some discomfort in the socket evaluated by a SCS ≤ 7/10 * Absence of severe comorbidity * Patient with a smartphone and a functional 4G connection Exclusion Criteria: * Cognitive impairment that does not allow instructions to be followed * Have already been equipped with the evaluated vacuum suspension system * Pregnant women * Patient subject to a legal protection measure * Patient not affiliated with social security