An occult cause of hemodialysis vascular access dysfunction.

Although hemodialysis vascular access dysfunction is often caused by venous stenosis, stenosis can occur anywhere in the circuit. Herein, we report a 75-year-old woman who received repeated percutaneous angioplasty due to insufficient flow. Finally, a culprit stenosis at the subclavian artery was found and treated. Subclavian artery stenosis is often atherosclerotic in origin and is usually delayed to be diagnosed because of caveats in the care of vascular access. This case highlights important clues that can assist in the early discovery of inflow problems and reminds the physician that inflow stenosis may be hidden at a site far from the anastomosis.