The group's principal activity is to design, manufacture and distribute advanced medical devices. the group sells two major lines of enteral feeding pumps and a variety of related disposable delivery sets and feeding tubes. the market includes feeding pumps, disposable sets and feeding tubes used by patients who require direct gastrointestinal nutrition therapy. the products include ophthalmic surgical devices, ultrasonic sensors, optoelectronic sensors and custom integrated circuits. medical devices accounted for 96% of 2001 revenues and engineering services, 4%.