title: Preoperative hepatic venous embolization for partial hepatectomy combined with segmental resection of major hepatic vein.
abstract: BACKGROUND
  Liver resection of segments VII and/or VIII sometimes requires segmental resection of the right hepatic vein in patients with liver tumours invading or located close to the hepatic vein. In this situation, hepatic vein reconstruction is thought to have an important role in the postoperative function of segment VI. This study investigated whether preoperative embolization of the major hepatic vein could obviate the need for hepatic vein reconstruction after cranial partial resection of the liver including the major hepatic vein trunk in a preclinical model.
  
  
  METHODS
  Sixteen beagles were divided into two groups of eight: control group (hepatectomy alone) and hepatic venous embolization (HVE) group (hepatectomy after HVE). HVE was performed 2 weeks before hepatectomy. All dogs underwent resection of the cranial third of the left lateral liver lobe together with the major trunk of the left hepatic vein. Following hepatectomy, survival, histological features, portal venous pressure and serum aspartate aminotransferase (AST) levels were determined.
  
  
  RESULTS
  Six control animals and seven in the HVE group were alive 1 week after hepatectomy. Immediately after hepatectomy, portal venous pressure was significantly higher in the control group compared with the HVE group (mean(s.d.) 14.0(1.1) versus 8.1(1.0) mmHg; P < 0.01). Histological examination of the remnant left lateral lobe demonstrated patchy parenchymal haemorrhage in the control group and normal parenchymal architecture in the HVE group. Peak AST levels were observed on day 1 in both groups and were significantly higher in the control group (mean(s.d.) 182(42) versus 67(40) units/l; P < 0.01).
  
  
  CONCLUSIONS
  In this model, preoperative HVE facilitated interlobar venous collateral formation and minimized the untoward effects of segmental hepatic vein resection. This procedure may obviate the need for hepatic vein reconstruction after cranial partial liver resection including the major hepatic vein.
authors.affiliation: Department of Surgery I, Faculty of Medicine, Kobe University, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. yonson@med.kobe-u.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Ku
authors.forename: M
authors.initials: M
authors.lastname: Tominaga
authors.forename: T
authors.initials: T
authors.lastname: Sugimoto
authors.forename: T
authors.initials: T
authors.lastname: Iwasaki
authors.forename: T
authors.initials: T
authors.lastname: Fukumoto
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: Y
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Y
authors.initials: Y
authors.lastname: Kuroda
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D015415:Biomarkers / Q000097:blood; D001794:Blood Pressure / Q000502:physiology; D001807:Blood Vessel Prosthesis; D004285:Dogs; D004621:Embolization, Therapeutic / Q000379:methods*; D005260:Female; D006498:Hepatectomy / Q000379:methods*; D006503:Hepatic Veins / Q000601:surgery*; D008297:Male; D023421:Models, Animal; D011300:Preoperative Care / Q000379:methods
chemical_list: D015415:Biomarkers; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase