Automated 3D Ultrasound-based Surveillance of Arteriovenous Fistula Maturation for Post-operative Hemodialysis Patients

This is Stage 1 of a 2 stage protocol, targeting to enroll 60 patients in prospective, single arm, non-randomized, multi-center observational study to record objective data in patients undergoing upper extremity arteriovenous fistula construction with autologous tissue for the purpose of eventual hemodialysis access, in whom the EchoMark is placed at the site of vascular anastomosis. Follow-up visits include EchoSure and duplex imaging.