Abstract: A process for measuring parameters of organs and tissues, especially blood flow through an organ, particularly the liver, is based on a medical technology apparatus that can be constructed in modular fashion. The preferred process uses the hydrogen clearance method to determine blood flow. The preferred apparatus includes at least one measuring instrument and at least one measuring or therapy sensor that is detachable from that instrument. Additional connecting elements make it possible to construct an individually adapted measurement array. For a monitoring and checking operation, both the sensors or therapy heads, and the various connecting elements are equipped with electronic code elements which can be systematically read and evaluated by at least one of the measuring instruments used.

Abstract: For the temporary fixation of teeth, teeth rows or jaw parts, the device has a wire (9), on which annular composite carriers (7) are movably arranged. The composite carriers (7) can, for example, be flexible synthetic material rings of cross-section in the form of a truncated cone, through which the wire (9) is guided by means of two holes (8) arranged in the walls, which lie opposite one another, of the composite carriers (7).The new splint makes possible the exact positioning of the composite carriers (7) which are arranged movably on the wire (9) and can be deformed at will by hand.