title: Indications for posthepatectomy hepatic vein reconstruction from functional and morphological studies: clamping test and hepatic vein branch distribution determined by three-dimensional computed tomography.
abstract: OBJECTIVE
  Indications for hepatic vein reconstruction for preserving remnant liver function after hepatectomy were assessed using the clamping test and the findings of preoperative 3D-CT (3-dimensional computed tomography).
  
  
  METHODS
  Fifteen patients who underwent hepatectomy for malignant tumors in segment VII or VIII, or both, were examined with preoperative 3D-CT and an intraoperative clamping test.
  
  
  RESULTS
  On the basis of changes in right hepatic venous pressure during clamping, we classified all patients into 3 types: the persistent elevation type (P-type, 8 patients), the no elevation type (N-type, 3 patients) and the transitory elevation type (T-type, 4 patients). Hepatic venous hemoglobin oxygen saturation (ShvO2) decreased significantly in the P type but hardly changed in the T and N types during the clamping test. Both the inferior right hepatic vein (IRV6) and the tributary of the middle hepatic vein draining segment V (MV5) were detected by preoperative 3D-CT in the T and N types.
  
  
  CONCLUSIONS
  Assessments of hepatic vein branch distribution using preoperative 3D-CT served to predict the results of the hepatic vein clamping test. The results of preoperative 3D-CT were useful as indications for hepatic vein reconstruction.
authors.affiliation: Department of Surgery II, Yokohama City University School of Medicine, Yokohama, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Togo
authors.forename: R
authors.initials: R
authors.lastname: Shizawa
authors.forename: E
authors.initials: E
authors.lastname: Kanemura
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Nagano
authors.forename: I
authors.initials: I
authors.lastname: Endo
authors.forename: H
authors.initials: H
authors.lastname: Sekido
authors.forename: H
authors.initials: H
authors.lastname: Shimada
mesh_terms: D000328:Adult; D000368:Aged; D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging / Q000601:surgery; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D006498:Hepatectomy / Q000379:methods*; D006503:Hepatic Veins / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D021621:Imaging, Three-Dimensional; D008113:Liver Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging* / Q000601:surgery; D011237:Predictive Value of Tests; D012086:Reoperation; D014057:Tomography, X-Ray Computed; D014690:Venous Pressure / Q000502:physiology*