한국인 태아의 완두동맥, 총경동맥 및 쇄골하동맥에 관한 해부학적 관찰

Abstract

1. The length and a half of the circumferences of the main branchs from the Aortic arch (namely Innominate. Carotid and Subclavian arteries) of 218 dead Korean normal fetuses in both sexes aged from 5 th to 10 th fetal months have been studied by means of measuring and observing the pattern of the growth in the latest half of the fetal life. 2. The gradual increment of the various values is observed adding the fetal age from the beginning until the end month in present observation. expectedly. 3. Of the growth of the Innominate arteries the average growth rates in both the length's before the 7 th month are higher than those of the rates after the 7 th month. The ratio's between the lengths and the half circumferences are increased in successive fetal months from the beginning to the end of present observation. 4. Of the growth in length of the Carotid arteries in general, a relatively constant growth rate is detectable throughout the period in present observation. The ratios. however. between both sides are greater during the period after the 7 th month than those before the 7 tho Of the growth of a half circumference the growth rates are lowered directly after the 6 th and 9th. whereas. the ratio's directly before 6 th and 9th are maintained in higher level. The ratios between the length and a half circumference are maintaine throughout the period in present observation. 5. The growth rates of the half circumferences in the Subclavian arteries are declaine with adding the fetal month. 6. Of the growth rates in the various diameters the greater growth rates are observed in a half circumferences. while. the lesser is for those of the lenths. 7. None of the conclusive sexual differences is drown under a statistical support.