LAKE FOREST, Calif.--(BUSINESS WIRE)--I-FLOW CORPORATION (NASDAQ:IFLO) today announced financial results for the first quarter of 2007, highlighted by a 34% increase in revenue in its Regional Anesthesia business to a first-quarter record of $19.1 million compared to $14.3 million for the first quarter of 2006, and a 22% increase in total revenue from continuing operations to $24.3 million compared to $19.9 million in the prior year quarter.