[New methods for assessing gastrointestinal blood flow].
Non-invasive tests for evaluation of intestinal blood flow include duplex scanning and laser Doppler flowmetry. Duplex scanning combines ultrasonic imaging with a pulsed doppler unit. By analysing flow curves and changes in Doppler frequency spectra blood flow in the mesenteric arteries and the coeliac trunc can be analysed. Laser Doppler flowmetry is another promising new technique. The fiber optic guides, which conduct laser light to the tissue and carry back-scattered light to a photodetector, can be placed endoscopically on the mucosal surface of the bowel, thus allowing examination of the intestinal mucosal microcirculation.
Hoffmann
U
U
Department für Innere Medizin, Medizinische Poliklinik, Universitätsspital Zürich.
Münch
R
R
D001783:Blood Flow Velocity / Q000502:physiology; D002445:Celiac Artery / Q000000981:diagnostic imaging*; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging; D004064:Digestive System / Q000098:blood supply*; D006801:Humans; D007511:Ischemia / Q000000981:diagnostic imaging; D008638:Mesenteric Arteries / Q000000981:diagnostic imaging*; D008641:Mesenteric Vascular Occlusion / Q000000981:diagnostic imaging; D014463:Ultrasonography / Q000295:instrumentation*
Neue Methoden zur Erfassung des gastrointestinalen Blutflusses.