LAKE FOREST, Calif.--(BUSINESS WIRE)--I-Flow Corporation (NASDAQ:IFLO) announced today that the company has been awarded a three-year national purchasing contract by HealthTrust Purchasing Group (HealthTrust), a healthcare group purchasing organization (GPO), to make the ON-Q Pain Relief System available to all its members. This includes ON-Q® PainBuster®, ON-Q SilverSoaker™ Antimicrobial Catheter with SilvaGard® and ON-Q C-bloc®. The agreement will be in effect from October 1, 2008 through September 30, 2011.