Influence of Doppler Angle in Carotid Artery Duplex Ultrasound Evaluation

DOI 8 References
  • Sugawara Masayo
    Vascular Board, Department of Clinical Laboratory, The University of Tokyo Hospital, Tokyo, Japan
  • Akai Atsushi
    Department of Vascular Surgery, The University of Tokyo Hospital, Tokyo, Japan
  • Chigira Mayumi
    Vascular Board, Department of Clinical Laboratory, The University of Tokyo Hospital, Tokyo, Japan
  • Okano Tomoko
    Vascular Board, Department of Clinical Laboratory, The University of Tokyo Hospital, Tokyo, Japan
  • Okamoto Hiroyuki
    Department of Vascular Surgery, The University of Tokyo Hospital, Tokyo, Japan
  • Shigematsu Kunihiro
    Department of Vascular Surgery, The University of Tokyo Hospital, Tokyo, Japan
  • Miyata Tetsuro
    Vascular Center, Sanno Hospital and Sanno Medical Center, Tokyo, Japan

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  • 超音波検査による内頸動脈狭窄診断におけるドプラ入射角の影響

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We investigated influence of Doppler angle on peak systolic velocity (PSV). In our hospital, 109 carotid arteries were examined using carotid duplex. The PSVs obtained with a 45˚ and a 60˚ insonation angles at the distal common carotid artery and proximal internal carotid artery were statistically analyzed. The PSV measurements obtained with the two fixed insonation angles were statistically significantly different (p < 0.0001). Doppler insonation angle has a significant influence on PSV. Carotid duplex examination should be performed with a fixed angle in order to obtain reproducible results.

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