Reactive hyperaemia in the hind limbs of rabbits
Myhre, H.O.
Acta Chirurgica Scandinavica 141(4): 259-265
1975
ISSN/ISBN: 0001-5482 PMID: 1154977 Document Number: 91473
Reactive hyperaemia was measured with electromagnetic flowmetry of the terminal aorta in rabbits. The aorta was occluded just above the bifurcation for periods from 10 seconds to 5 minutes. Maximal flow and recovery time of reactive hyperaemia increased significantly with increasing periods of circulatory arrest. Percentual repayment was higher after brief occlusions (10-30 seconds) than after long occlusions (1-5 minutes), when a percentual repayment of about 40% was found. A slight decrease of ascending aortic flow was observed when reactive hyperaemia was induced in the hind limbs. Several mechanisms may play a part in reactive hyperaemia, and the relative importance of the different mechanisms may vary with the length of occlusion.