Gardaire E, Avella M, Isaia J, Bornancin M
Laboratoire de Physiologie Cellulaire et Comparée, URA CNRS 651, Université de Nice, France.
J Comp Physiol B. 1991;161(3):265-9. doi: 10.1007/BF00262307.
Using the isolated-perfused head preparation at a constant flow rate, hemodynamic effects of adrenaline were studied in trout gills. The calculation of the vascular spaces was performed with the isotopic pulse technique allowing measurement of the distribution space of the tracer. The results show that the branchial arterial circuit was cleared more quickly than the branchial venous and cephalic circuits. Adrenaline addition significantly increased the volume of the branchial arterial circuit at the expense of the venous circuit, illustrating the closing of arterio-venous sphincters under catecholamine control. The increase of the arterial volume could be explained by a vasodilation of the arterial circuit, rather than resulting from lamellar recruitment. Furthermore, the flow rate of the cephalic circuit represented 5% of the total branchial flow rate.
在以恒定流速进行的离体灌注头部制备实验中，研究了肾上腺素对虹鳟鱼鳃的血流动力学影响。采用同位素脉冲技术进行血管空间的计算，该技术可测量示踪剂的分布空间。结果表明，鳃动脉循环比鳃静脉和头部循环清除得更快。添加肾上腺素显著增加了鳃动脉循环的体积，同时牺牲了静脉循环的体积，这表明在儿茶酚胺的控制下动静脉括约肌关闭。动脉体积的增加可以用动脉循环的血管舒张来解释，而不是由片状结构的募集导致。此外，头部循环的流速占总鳃流速的5%。
