ORANGE COUNTY

Dutch Buy More of Catheter Firm: Luther Medical Products Inc., a manufacturer of catheter systems, said a Dutch investment group has agreed to purchase stock and warrants for $500,000 in cash, boosting its stake in the Tustin company to 8.5%. Gandalf Partners, based in the Netherlands, intends to file documents with the Securities and Exchange Commission that are required when a shareholder acquires 5% or more of a public company. W. Tate Scott, Luther Medical president, said the company is considering offering Gandalf a seat on its six-member board of directors. Gandalf Partners, made up of 11 Dutch investors, invests in environmental and medical-technology companies.