title: [New non-invasive possibilities for assessing the function of the utero- and fetoplacental unit: Doppler sonography flow characteristics of selected arteries in normal pregnancy].
abstract: The introduction of the Doppler ultrasound measurements opened a new functional dimension in ultrasound diagnosis. For the first time, there is a possibility of estimating both the physiology and the pathophysiology of the uteroplacentofoetal haemodynamics with a noninvasive method during pregnancy. On the basis of more than 400 Doppler ultrasound vascular tests in uteroplacental arteries and in the umbilical artery of 110 pregnant women the blood flow velocity wave-forms were analyzed qualitatively with the pulsatility index, the resistance index and the S/D ratio. The gestational age-related decrease of these values in normal pregnancies reflects a reduction of the flow resistance in placental villous circulation. The values in retroplacentary arteries depend on the location of the tested vessel. The reference values are presented and the problems of the Doppler ultrasound numerical value inquiry and interpretation are discussed.
authors.forename: R
authors.initials: R
authors.lastname: Mager
authors.forename: P
authors.initials: P
authors.lastname: Mager
authors.forename: W
authors.initials: W
authors.lastname: Ullrich
authors.forename: B
authors.initials: B
authors.lastname: Enzenross
authors.forename: D
authors.initials: D
authors.lastname: Mücke
mesh_terms: D001158:Arteries; D001783:Blood Flow Velocity; D005260:Female; D005312:Fetal Blood / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000098:blood supply; D011247:Pregnancy / Q000502:physiology*; D011296:Prenatal Diagnosis; D012016:Reference Values; D014463:Ultrasonography; D014469:Umbilical Arteries; D014599:Uterus / Q000098:blood supply
vernacular_title: Neue nichtinvasive Möglichkeit zur Beurteilung der Funktion der utero- und fetoplazentaren Einheit: Doppler-sonographische Flusscharakteristika ausgewählter arterieller Gefässe während der normalen Schwangerschaft.