Abstract
Ten patients with internal carotid aneurysms were managed by internal carotid artery (ICA) ligation. Pre-, intra- and post-operative regional cerebral blood flow (rCBF) were measured by the heat clearance method and 133Xe inhalation method.
Abrupt ICA occlusion was carried out in one case, abrupt ICA occlusion combined with EC-IC bypass was carried out in three cases, and gradual ICA occlusion combined with EC-IC bypass was carried out in six cases.
During ICA occlusion, rCBF were reduced less than 20% in six cases and more than 50% in four cases. Permanent cerebral ischemia occurred in four cases, and transient cerebral ischemia occurred in one case. In four cases with ischemic complications, reduction of CBF was more than 50%.
Measurement of CBF might be useful for the prediction of cerebral ischemia in the therapeutic ligation of the cervical ICA.
