Piggyback allogeneic orthotopic liver transplantation was performed successfully in a patient with primary biliary cirrhosis on July 26,1996. Topographic study of hepatic veins and short hepatic veins were made in 17 adult cadavers. The majority of short hepatic veins were found in the middle and lower portion of inferior vena cava (IVC) behind liver, but two of 17 cases had a big accessory middle hepatic vein and the right hepatic vein (1 case) divided four branchs into IVC in the area. The lengths of the main trunk of left, middle and right hepatic vein were 22.8±8.80 mm, 50.98±23.94 mm and 22.80±9.50 mm and the diameters were 10.74±2.86 mm, 9.50±3.75 mm and 15.60±4.05 mm respectively. The right hepatic vein in all cases, except one drained into IVC as one vessel. The middle and left hepatic vein drained into IVC in different forms: ①joining as one vessel longer than 1cm before entering IVC (23.5%);②joining right before entering IVC (70.6%); ③draining into IVC separately (5.9%). The distance between right and middle hepatic vein was 7-23 mm. Topography of hepatic veinous flow related with the technique of piggyback operation and removing of diseased liver is discussed.
Objective To find out some parameters to judge the stability of the wrists after four-corner arthrodesis and to explore the strategyfor improving the range of motion (ROM) of the wrist after four-corner arthrodesis. Methods After the simulated four-corner arthrodesis was performed in both wrists of 8 men and 4 women cadaver, the wrists were fixed on the wrist motor simulator; and wrist movement including flexion, extension, radial deviation, ulnar deviation was simulated. The standard posteroanterior and lateral radiographs were taken for measuring the change of capitolunate angle（α）, radiolunate angle（β）, capitolunate posteroanterior angle（θ）, the height（H）and width（W）of the fused four carpal bone bloc. Results There were statistically significant differences in α,β,θ angles (P＜0.01) in the case of 50° flexion or 40° extension, and in H and W values (P＜0.05) in the case of 25° ulnar deviation or 15° radial deviation when compared with before movement. Conclusion Capitolunate angle, radiolunate angle, capitolunate posteroanterior angle, the height and the width of thefused four carpal bone bloc can be used to judge the stability of the wrists after four-corner arthrodesis.