谷口 信行¹, 伊東 紘一¹, 宮本 一夫², 井上 信康², 若松 立也², 高野 隆一³, 尾本 きよか¹

Nobuyuki TANIGUCHI¹, Kouichi ITOH¹, Kazuo MIYAMOTO², Nobuyasu INOUE², Tatsuya WAKAMATSU², Ryuichi TAKANO³, Kiyoka OMOTO¹

¹自治医科大学臨床病理学, ²アロカ, ³自治医科大学腎臓内科

¹Department of Clinical Pathology Jichi Medical School, ²Aloka Co., ³Department of Nephrology Jichi Medical School

キーワード :

We developed a method for presenting a velocity profile of a blood flow by modifying an ordinary ultrasonographic apparatus to enable it to measure flow velocity with color-Doppler signals. Conventional pulsed-Doppler methods, employing multi-gate laser Doppler, hot film, or nuclear magnetic resonance, require an apparatus designed specifically for the purpose; they are also time-consuming and require expertise. Temporal resolution was 40 to 100 msec, depending on the frame rate of the color-Doppler images. One profile can be produced several seconds after freezing the color-Doppler image. Velocity-mode profiles of the common carotids and abdominal aorta were of a central flat pattern, not of the parabolic pattern reported in previous studies. Flow velocity in the common hepatic artery was faster in the outer than in the inner stream, probably because of arterial curvature. The present method can also provide a power-mode profile of a blood flow, although the clinical significance of this profile remains to be elucidated. This method can be used to assess blood flow in diseased arteries as well as in the venous system.