Peripheral Bypass Trial for Completion Control
The goal of the study is to identify and validate flow measurement and ultrasound images in patients undergoing vein bypass surgery below-knee and above ankle
- EligibilityCriteria: Inclusion Criteria:  CLTI as defined by presence of PAD in combination with rest pain, gangrene, or a lower limb ulceration>2 weeks duration (ref Global Guidelines) Atherosclerotic infra-popliteal PAD Adequate distal anastomotic target (crural, tibial or popliteal BTK with one single run-off) between knee and ankle distal to the stenotic/occluded segment. Available autogenous vein conduit based on preoperative vein mapping. Understand the nature of the procedure and willingness to comply with protocol. Attend follow-up appointments and provide written informed consent.  Exclusion Criteria:  Bypass with artificial conduit or cryopreserved allografts Bypass for non-atherosclerotic lesions Life-expectancy less than 2 years Any psychological, developmental, physical or emotional disorder that the investigator believes would interfere with surgery or follow-up. Any condition that the investigator believes should exclude participation. Excessive risk for adverse events during open surgery as judged by the investigator. - HealthyVolunteers: No - Gender: All - MinimumAge: 18 Years - StdAgeList: Adult, Older Adult