A Multi Center, Study to Evaluate the Safety and Efficacy of the VasQ External Support Device for Arteriovenous Fistulas

Inclusion Criteria: * Patients referred for creation of a new brachiocephalic fistula who consent to take part in the study. * Aged \> 18 * Male and female participants * Patients willing and able to attend follow up visits over a period of 6 months Exclusion Criteria: * Patients who require revision surgery. * Having had previous arteriovenous fistula surgery is not a contraindication to recruitment provided the new procedure is not revision surgery * Target arteries smaller than 3 mm in diameter * Target vein smaller than 3 mm in diameter * Stenotic veins on the side of surgery as diagnosed on pre-op ultrasound * Patients with prior central venous stenosis or obstruction on the side of surgery * Depth of vein greater than 8 mm (on US) on side of surgery * Known coagulation disorder * Prior steal * Known allergy to nitinol * Life expectancy less than 6 months * Inability to give consent and/or comply with the study follow up schedule * Women of child bearing age