In May of 2012, CryoLife acquired Hemosphere, Inc. Hemosphere manufactures the HeRO® (Hemodialysis Reliable Outflow) Graft, which is a vascular access device for use in hemodialysis for patients with end-stage renal disease. The HeRO Graft is the ONLY fully subcutaneous AV access solution clinically proven to maintain long term access for hemodialysis patients with central venous stenosis.