title: [Assessment of blood flow by Doppler method].
abstract: There are two categories including Doppler sound and color-duplex sonography to assess blood flow using Doppler principle. Ankle pressure measurement has been a useful method to assess the severity of lower limb by Doppler sound. Color-duplex sonography could recognize total occlusion with no signal and significant stenosis with jet and turbulence, which could also differentiate embolism from thrombosis. Internal carotid lesion could be delineated to provoke minor stroke, and transient ischemic attack by this method. Ruptured aneurysm couldn't be diagnosed precisely by the color-duplex sonography. Doppler sound has been used to evaluate deep vein patency; however, recent available color-duplex sonography as well as gray scale ultrasonography could recognize thrombus formation precisely around the femoral, popliteal, and infrapopliteal deep vein.
authors.affiliation: Tokyo Medical and Dental University, School of Medicine, Department of Surgery.
authors.forename: Y
authors.initials: Y
authors.lastname: Inoue
authors.forename: T
authors.initials: T
authors.lastname: Iwai
mesh_terms: D001775:Blood Circulation / Q000502:physiology*; D006801:Humans; D013927:Thrombosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D018608:Ultrasonography, Doppler / Q000379:methods*; D018615:Ultrasonography, Doppler, Color / Q000379:methods