Feasibility Study of Dialysis Clinic Semi-Autonomous Ultrasound Scanning Using the Vexev Ultrasound Imaging System for Arteriovenous Fistula Mapping Examinations. The CANSCAN Trial.

Inclusion criteria

• Referred to a study site for chronic renal replacement therapy OR referred to a study site for management of CKD.
• Able to understand the procedures and requirements of the study and provide written informed consent and authorization for protected health information disclosure.
• Greater than or equal to 21 years of age at the time of written informed consent.

Exclusion criteria

• Patients' unable to load arm into scanning bed (due to upper limb medical co-morbidities/injury).
• Patient has evidence of open or incompletely healed wounds on both arms. Patients with open or incompletely healed wounds on a single arm are not excluded - if the ipsilateral arm is not able to be scanned - contralateral arm may be scanned.
• Any acute or chronic condition that would limit the ability of the patient to participate in the study - in the opinion of the principal investigator.
• Previous vascular/vascular access surgery on both upper limbs. Patients with previous vascular/vascular access surgery on a single arm are not excluded- contralateral arm may be scanned.

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