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目前一般都使用水囊法间接测定游离左心室腔的容量。如果水囊外壁与心内膜之间腔隙的容量也可以测得,则本法当可精确地间接测得心室腔的容量。以往对囊外壁与心内膜之间腔隙的容量并无报导。本工作旨在狗心测定这一容量,以使本法的精确性得以提高。实验于6只离体狗心进行。用10％福尔马林将心脏固定2～5天。固定时使心室内压分别维持于0～25厘米水柱,以获得不同心室腔容量的心脏标本。固定后将心房、动脉及右心室壁剪去,将左心室称重,并向左心室充水,借量筒直接测得其容量;将薄壁水囊(Qualatex No.9氦气囊)固定于连接器的末端,并将囊插入左心室,囊腔通过T
At present, the capacity of the free left ventricular cavity is indirectly measured by the water sac method. If the volume of the space between the outer wall of the balloon and the endocardium can also be measured, this method can accurately and indirectly measure the capacity of the ventricular chamber. In the past to the outer wall of the capsule and the capacity of the gap between the endocardium has not been reported. The purpose of this work is to determine the volume of the dog’s heart in order to improve the accuracy of the law. Experiments in six isolated dog heart. The heart is fixed with 10% formalin for 2 to 5 days. Fixed ventricular pressure was maintained at 0 to 25 cm water column, to obtain different ventricular cavity volume of the heart specimens. After fixation, the atrium, artery and right ventricular wall were cut off, the left ventricle was weighed and the left ventricle was filled with water. The capacity of the ventricle was measured directly by a measuring tube. The thin-walled water sac (Qualatex No.9 helium balloon) was fixed on the connector End, and the capsule into the left ventricle, cysts through T