Following Ueda-Yasuda's Procedure, the author observed changes on the portal blood circulation time, the body temperature, the blood pressue and the pulse rate of 16 patients (A group, five patients with caecum mobile or appendicitis chronica : B group, six patients with appendicitis acuta non-perforativa : C group, five patients with appendicitis acuta perforativa = appendicular peritonitis). Measurements were taken four or five times: before operation, immediately after operation, on the first, third, and fifth, postoperative day. Portal blood circulation time before operation was significantly prolonged in C and B group as compared with A group. Portal blood circulation time immediately after operation was prolonged in each group as compared with that taken before operation. Postoperative duration of prolonged portal blood circulation time was longer in C group more than in A and B group. Postoperative courses of all 16 patients were good and without postoperative complications.