ORANGE COUNTY

Medical Laser Makers Offer Stock: Advanced Interventional Systems Inc., a maker of medical lasers, said its first public stock offering Wednesday sold at $13 a share. The 2.3 million shares sold Wednesday brought the company $27 million, minus its costs and commissions. The stock went on to close at $17.50 on its first day of trading on the over-the-counter market, up $2.25 after opening on the market at $14.75. The new stock’s symbol is “LAIS.” The 5-year-old company makes a type of laser that scours fatty deposits from arteries as an alternative to open-heart surgery. The fat turns into gases and is eliminated from the body. The stocks of medical technology companies have been hot with investors lately, stockbrokers said in explaining Advanced Interventional’s strong first-day performance.