鸡胚胎的血气列线图：绒毛尿囊膜与胚胎之间的血流分布
A blood-gas nomogram of the chick fetus: blood flow distribution between the chorioallantois and fetus.
作者信息
Olszowka A J, Tazawa H, Rahn H
机构信息
Department of Physiology, State University of New York, Buffalo 14214.
出版信息
Respir Physiol. 1988 Mar;71(3):315-30. doi: 10.1016/0034-5687(88)90025-4.
This paper presents equations for quantifying the relationships between the O2 and CO2 concentrations and tensions in the blood of the 18-day chick fetus. A blood-gas nomogram showing these relationships is presented. Starting with the reported chorioallantoic artery and vein gas tensions and using the blood-gas equations, the range of embryonic arterial and venous gas tensions as well as the distribution of the cardiac output and the degree of mixing between the chorioallantoic and embryonic circulations are explored. It is concluded that at least 65% of the blood in the chorioallantoic artery consists of blood of embryonic mixed venous composition. A model of the blood flow distribution is proposed in which chorioallantoic and embryonic flows are equal, with 70% of the blood returning from the tissues of the embryo going to the chorioallantois and vice versa.
本文给出了用于量化18日龄鸡胚血液中氧气和二氧化碳浓度及分压之间关系的方程式。文中呈现了一张显示这些关系的血气列线图。从已报道的尿囊动脉和静脉血气分压出发，利用血气方程式，探讨了胚胎动脉和静脉血气分压的范围、心输出量的分布以及尿囊循环和胚胎循环之间的混合程度。得出的结论是，尿囊动脉中至少65%的血液由胚胎混合静脉成分的血液组成。提出了一种血流分布模型，其中尿囊血流和胚胎血流相等，从胚胎组织回流的血液中有70%流向尿囊，反之亦然。
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