Stehbens, W.E.
October 1974
Angiology;Oct1974, Vol. 25 Issue 9, p561
Academic Journal
The lower abdominal aorta and renal arteries of rabbits and several miscellaneous arteries were cannulated and perfused with barium-gelatin mixture. After cooling and fixation, step-serial histological sections at 0.5 mm intervals were cut from the distal stem and bifurcations. Cross-sectional areas were calculated at each level and for the common iliac arteries whenever they were uncomplicated by early branching. Considerable distortion of the lumen occurred before, during and immediately after branching. The lumen of the stern of each artery exhibited eccentric and often asymmetrical expansion at the approach of branches and bifurcations associated with increments in cross-sectional areas exceeding 100% before actual division of the lumen. Such an expansion must be taken into account in any theoretical or mathematical analysis of flow at arterial forks and is likely to be of more importance than the area ratio which was found to he unreliable due to variation according to the site and method of mensuration.


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