title: In vivo validation of image-directed Doppler measurement of superior mesenteric artery blood flow.
abstract: Image-directed Doppler measurement of superior mesenteric artery blood flow in volunteers was validated in two artificial models with either a venous or an arterial flow profile. In the "venous" model, the Doppler device overestimated the real flow velocity by 86 +/- 7%, and in the "arterial" model by 24 +/- 9%. The areas under the time-frequency curves (AUCs) from the arterial model were measured by planimetry. A correction factor of 1.47 between flow velocities calculated after planimetry and real flow was established. Correction for this factor resulted in a flow velocity of 19.5 +/- 4.7 cm/s and a blood flow rate of 377 +/- 166 ml/min in the volunteers.
authors.affiliation: Department of Gastroenterology, Medizinische Universitätsklinik, Tübingen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Scheurlen
authors.forename: C
authors.initials: C
authors.lastname: Waller
authors.forename: F
authors.initials: F
authors.lastname: Hartmann
mesh_terms: D000328:Adult; D001783:Blood Flow Velocity; D005260:Female; D006801:Humans; D008297:Male; D008638:Mesenteric Arteries / Q000000981:diagnostic imaging / Q000502:physiology*; D008642:Mesenteric Veins / Q000000981:diagnostic imaging / Q000502:physiology*; D008955:Models, Cardiovascular; D012212:Rheology; D014463:Ultrasonography