森安 史典¹, 西田 修¹, 伴 信之¹, 中村 武史¹, 宋 泰成³, 越智 次郎¹, 酒井 正彦¹, 三宅 健夫², 内野 治人¹

Fuminori MORIYASU¹, Osamu NISHIDA¹, Nobuyuki BAN¹, Takefumi NAKAMURA¹, Yasunari SOH³, Jiro OCHI¹, Masahiko SAKAI¹, Takeo MIYAKE², Haruto UCHINO¹

¹京都大学医学部第一内科, ²京都大学医学部老年科, ³県立尼崎病院消化器内科

¹The First Department of Internal Medicine, Faculty of Medicine, Kyoto University, ²The Department of Geriatrics, Faculty of Medicine, Kyoto University, ³Amagasaki Prefectural Hospital

キーワード : Ultrasonic duplex system, Pulsed Doppler flowmeter, Portal hypertension, Portal vein, Congestion index

　We have entitled the ratio of the cross-sectional area and blood flow velocity the "Congestion Index" of the portal vein. Both the cross-sectional area and the blood flow velocity were measured by an ultrasonic duplex system. Congestion Index (C.I.) was calculated by the equation, C.I.=Cross-sectional area (cm²) / Blood flow velocity (cm/sec). The results were as follows; Normal subjects: 0.070±0.029 cm·sec (n=85, mean±S.D.), Acute hepatitis: 0.071±0.014 cm·sec (n=11), Chronic inactive hepatitis: 0.075±0.030 cm·sec (n=16), Chronic active hepatitis: 0.119±0.084 cm·sec (n=42), Cirrhosis: 0.171±0.075 cm·sec (n=72), Idiopathic portal hypertension: 0.180±0.107 cm·sec (n=11), Hepatocellular carcinoma: 0.178±0.065 cm·see (n=23). In the last four groups, there were statistically significant differences from the normal subject group. From the clinical diagnostic point of view, the C.I. has a high differencial sensitivity (90% in cirrhosis, idiopathic portal hypertension, and hepatocellular carcinoma). A positive correlation was obtained between the C.I. and the portal venous pressure, measured percutaneously and simultaneously. (n=66, r=0.45, p