한국인 태아간장의 혈관계에 관한 형태학적 연구 제1편 간외부

Abstract

The extrahepatic blood vessels of the livers one hundred and ninty nine Korean Fetuses aged .~ from five to ten fetal months were observed anatornicaly. 1) The hepatic arteries were classified to three types with ten subdivisions according to their origins. The type I ; the celiac type was most numerous (84. 9%). the type IT; the mixed type which had two hepatic branches. one originated from the celiac artery. the other originated from the superior mesenteric or left gastric artery. was the next order 02.6%), and the type III; the hepatic artery had no origin from the celiac artery. was few(2.5%). 2) Among the celiac type the text-book like type was in 80.9%, and two cases of them were behind the portal vein. The cases of division of the proper hepatic artery iito three branches. the left, right hepatic branches and the gastroduodenal artery, were in 1.0%. The cases that the left hepatic branch originated from the proper hepatic artery were in 2.5%. 3) Among the 12.6% abnormal hepatic arteries. the replaced left hepatic arteries from the left gastric artery were in 2.5%. the replaced right hepatic arteries f rom the superior mesenteric artery were in 4.0%, the accessory left hepatic arteries from the left gastric artery were in 1.5%, the accessory right hepatic arteries from the superior mesenteric artery were in 3.0%. Both left and right accessory hepatic arteries. the replaced left hepatic artery with the accessory right hepatic artery and the accessory left hepatic artery with the replaced right hepatic artery were in 0.5% of each. 4) Among the five cases of the abnormal hepatic arteries. the common trunk of the celiac with the superior mesentery artery was in 0.5%, the right hepatic artery originated from the abdominal aorta directly was one case, the replaced left gastric artery from the left gastric artery which originated from the abdominal aorta directly was three cases(1.5%) . 5) The right hepatic arteries which crossed in front of the hepatic duct were 11 cases (5.5%). 6) The single cystic artery was in 88.9%. the double cystic arteries were in 11.1%. 7) The cases of 93.8% of the single cystic artery and 86.4% of the double cystic arteries originated from the artery which distributed to the right hepatic lobe. Most of them originated from the typical right hepatic artery and a few from the superior mesenteric artery. proper hepatic artery and the gastroduodenal artery. 8) Majority of the cystic artery originated in the Calor's triangle and reached the gall bladder without crossing the hepatic duct. 9) The union of the three radices of the portal vein had three types. The type I. union of the inferior mesenteric vein with the lienal vein was most numerous(48.8%). The type IT. union of the inferior mesenteric vein with the superior mesenteric vein was next (42.7%). The type III. the inferior mesenteric vein join with the angle between the two mesenteric veins. 'was least (5.0%). 10) The development of the inferior mesenteric vein was slow compared with the development of the other two racidies. The left and right branches of the portal vein were larger than the trunk of the portal vein throughout the fetal life. 11) The diameter of the Ductus venosus was less than half of the diameter of the umbilical vein and the development of the Ductus venosus was very slow. Therefore a small amount of blood which comes through the umbilical vein circulates through the Ductus venosus.