TERUMO CORPORATION operates in four business segment. The Hospital Products segment offers hospital medical equipment, pharmaceuticals, peritoneal dialysis and diabetes related products, and the rental of hospital medical equipment and home medical products. The Cardiac and Vascular Area segment is involved in the manufacture, purchase and sale of catheter systems, artificial heart and lungs, and artificial blood vessels, the manufacture and sale of therapeutic coils for cerebral aneurysm, sampling equipment and kits for platelet-rich plasma and concentrated bone-marrow cell, and large-bore sheaths. The Blood System segment is engaged in the manufacture, purchase and sale of blood transfusion-related products. The Healthcare segment offers healthcare related products. As of March 31, 2012, it had 79 subsidiaries and 2 associated companies. On February 28, 2013, it sold domiciliary oxygen and infusion pump business, including its two subsidiaries, to AIR WATER INC.