Comparison of 3 Ultrasonic Techniques for Measuring the Systolic Pressure Index

Inclusion Criteria: Patient referred to the Vascular Medicine Department of Caen University Hospital for a vascular examination with ABI measurement having been informed and not objecting to participation in the study and benefiting from a social protection system. Exclusion Criteria: * Patient with arrhythmia * Patient with trans-tibial or more proximal amputation * Patient with extensive trophic disorder not allowing measurement * Patient with subgonal bypass * Known bilateral sub-clavian stenoses * Patient deprived of liberty or under a measure of legal protection * Interned patient for the treatment of a psychiatric or physical illness * Patients who are legally incompetent, under the protection of justice, under guardianship or trusteeship.