title: [Doppler sonography].
abstract: The different applications of the ultrasonic Doppler method in connection with arterial and venous disturbance are discussed. The measurement of the systolic pressure of the extremities facilitates the determination of arterial flow impediments and the assessment of their compensation (degree of intesity). The effect of thrombotic complications and of lumen dilating measures can be defined rapidly with the help of this method. The Doppler sonography of the carotid flow (indirect method) permits through irradiation of the orbita arteries a diagnosis of high-grade internal carotid obliteration. The direct irradiation of the neck differentiates between occlusions and stenoses of the common, interned and external carotid arteries. The direct Doppler sonography of extremity arteries in the inguinal range is important for the assessment of flow impediments of the pelvis. It provides an aid for decision making whenever catheter angiography is envisaged. In the system of pelvis and leg veins thromboses of the V. femoralis and of the V. iliaca as well as ineffective valves can be discovered.
mesh_terms: D001158:Arteries; D001795:Blood Pressure Determination / Q000295:instrumentation; D004301:Doppler Effect; D005121:Extremities; D006801:Humans; D014463:Ultrasonography; D014652:Vascular Diseases / Q000175:diagnosis*; D014680:Veins
vernacular_title: Doppler-Sonographie.