Abstract: Method and apparatus for non-invasive measuring of the temperature change of a target inside a body by transmitting an ultrasonic pulse to the target, subjecting a pulse reflected from the large( to frequency analysis, and calculating the temperature change of the large therefrom. A frequency spectrum of the reflected pulse is produced and the calculation of the temperature change is effected on the basis of harmonics appearing in said spectrum.

Abstract: The invention relates to the use of a natural tissue matrix which has undergone recipient-specific transformation for producing an individual vein valve prosthesis without the natural tissue matrix having been acellularized.

Abstract: A shut-off valve for a fluid flow or an infusion instrument is described. A sleeve-form casing (2) with a lateral opening (4) between its ends is provided. An elastic tube piece (7) lies within casing (2) to allow fluid flow therethrough. A pressure body (14) is movable radially within the lateral opening (4) to selectively compress or not compress the tube piece (7) so as to occlude or open fluid flow through the tube piece (7). For simplification of manufacture and for quick operation of such a shut-off valve, especially without painful or injurious activities in operation, a tubular guide sleeve (8) is provided and surrounds the lateral opening (4) of the casing. Sleeve (8) is arranged to laterally project from the casing (2) and includes at least one pair of blocking stops (10, 10', 11 11'). The pressure body (14) has a plug shape. On the end of the pressure body (14), facing away from the tube piece (7), there is fastened a cap (16) with an elastic mantle (12) and snap ring (18) depending from the cap.