The number of direct arteriovenous anastomoses in the kidney.
D001163:Arteriovenous Anastomosis; D001164:Arteriovenous Fistula; D001166:Arteriovenous Shunt, Surgical; D005402:Fistula; D007668:Kidney / Q000098:blood supply*
FISTULA, ARTERIOVENOUS; KIDNEYS/blood supply