title: Simultaneous Doppler measurement of portal venous peak velocity, hepatic arterial peak velocity, and splenic arterial pulsatility index for assessment of hepatic circulation.
abstract: OBJECTIVE
  Quantitative Doppler assessment of hepatic circulation is widely performed in patients with cirrhosis. Since few studies have attempted to evaluate the various parameters simultaneously, we sought to examine the applicability and possible advantages of such simultaneous measurement for assessment of hepatic function.
  
  
  METHODS
  In 64 patients (21 with cirrhosis, 17 with chronic hepatitis, and 26 with no liver disorder) we prospectively performed Doppler measurement of right portal venous peak velocity (PVPV), right hepatic arterial peak systolic velocity (HAPSV) and splenic arterial pulsatility index (SAPI) and calculated a novel parameter, the hepatic circulatory index (HCI). The HCI was calculated using the formula: HCI (cm2/s2) = PVPV (cm/s) x HAPSV (cm/s)/SAPI.
  
  
  RESULTS
  Not every Doppler parameter was useful in itself for quantitative assessment of liver function. On the other hand, hepatic circulatory index was significantly higher in controls (1275.1 +/- 297.5) than in patients with hepatitis (931.7 +/- 270.5, P = 0.0003), or cirrhosis (586.4 +/- 264.9, P < 0.0001) and was highly correlated with the plasma clearance rate of indocyanine green (KICG; r = 0.848, P < 0.0001).
  
  
  CONCLUSIONS
  Hepatic circulatory index was correlated with KICG, which reflects hepatic circulation. The hepatic circulatory index is a novel parameter of hepatic circulation that can be measured easily at bedside, accurately reflecting hepatic circulatory status.
authors.affiliation: Second Department of Surgery, Nagoya University School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya 466-8550, Japan. sugi@med.nagoya-u.ac.jp
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Sugimoto
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Kaneko
authors.forename: Soichiro
authors.initials: S
authors.lastname: Inoue
authors.forename: Shin
authors.initials: S
authors.lastname: Takeda
authors.forename: Akimasa
authors.initials: A
authors.lastname: Nakao
mesh_terms: D000368:Aged; D001158:Arteries / Q000000981:diagnostic imaging; D001783:Blood Flow Velocity; D006521:Hepatitis, Chronic / Q000503:physiopathology; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging*; D008102:Liver Circulation / Q000502:physiology*; D008103:Liver Cirrhosis / Q000503:physiopathology; D008875:Middle Aged; D011168:Portal System / Q000000981:diagnostic imaging* / Q000502:physiology; D011446:Prospective Studies; D011673:Pulsatile Flow; D013154:Spleen / Q000098:blood supply*; D018608:Ultrasonography, Doppler