肺結核空洞の血管構造に関する研究

第二編 家兎正常肺の血管構造 特に気管支動,静脈について

抄録

The author has prepared Spalteholz's specimens and studied the vascularization of the normal rabbit lungs by the same method described in Part One and has drawn the following conclusions:
1) Pulmonary arteries continuously branch out from the hilus until finally they become terminal arteries in the alveolar ducts and there they enter into several adjacent alveolar capillary networks; but excepting the capillaries, they are completely independent and do not anastomose directly even with adjacent pulmonary arteries.
2) Pulmonary alveolar veins originate from alveolar capillaries in the alveolar ducts, and on their way they receive venous blood from the intrapulmonal bronchial veins.
3) Of the 15 rabbits, in 10 cases (66.6%), bronchial arteries originate only from the right superior intercostal arteries; and in other cases, besides these, they also originate from other arteries such as from left superior intercostal artery in 3 cases (20%) and in one case (6.7%) from the internal mammary artery, while the remaining one, from the aortic arc.
4) Bronchial arteries, after branching out into the esophagus, lymph nodes, etc., reach the hilus, and spread out into the mediastinal pleura and ligamenta; and with furter branching they finally reach bronchial capillaries.
5) Bronchial arteries, after forming networks of vessels in the bronchial capsules, penetrate through the bronhial wall, and finally reach submucous capillary networks.
6) Bronchial veins are consisted of so-called extra and intra pulmonary veins: the former originating from the proximal part of the third bronchial vessel networks under the mucous membrane and running more or less parallel to the bronchial arteries, they return to the right superior vena cava; while the latter, originating from the distal part of the same region and passing through the venous capillary anastomoses, reach pulmonary veins.
7) No anastomosis between bronchial arteries and veins on the one hand and the pulmonary arteries and veins on the other hand can be recognized other than those at the capillaries.