Magora, Florella; Davis, Eli
August 1966
Angiology;Aug1966, Vol. 17 Issue 8, p593
Academic Journal
Biomicroscopy of the bulbar conjunctival, lip, and nailfold small vessels was done in patients who were given unilateral cervico-thoracic sympathetic block. The changes observed appeared simultaneously on the blocked and contralateral side. They consisted of marked dilatation of the venules, appearance of new capillaries, improved blood flow, a decrease of sludge and spasm, and decrease or disappearance of vasomotion. The changes were less marked on the contralateral side. The changes observed paralleled the clinical signs of block. Vaso-motion, however, was equally decreased on both sides and for a shorter duration than the other changes. Several explanations are discussed.


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