Effect of Reduced Blood Pressure by Trimetaphan, PGE1, and Thoracic Epidural Block on Portal Venous Oxygenation - SASAKI, Toshio; HAYAKAWA, Jun; NOSE, Hirofumi; USUDA, Yutaka; ASADA, Mieko; SHIBATA, Toshinari (Nihon Rinshō Masui Gakkai shi, 1996)