Stanford University
The purposes of this study are twofold: 1) to assess the effect of a cervical sympathetic block on cerebral blood flow in patients suffering from cerebral vasospasm, after aneurysmal subarachnoid hemorrhage; 2) to evaluate the effect of the sympathetic block on the recovery of the neurological function.
Patients hospitalized in the intensive care unit (ICU) and developing clinical manifestations of cerebral vasospasm will be transferred to the neuro-interventional radiology suite for vasospasm treatment. After the vasospasm is confirmed by the angiography followed by a flat panel-computed tomography perfusion (FP-CTP) scan, a cervical sympathetic nerve block under ultrasound guidance will be performed. The block consists of the deposition of local anesthetic at the cervical sympathetic ganglion that will be visualized with an ultrasound device. The local anesthetic solution with be mixed wit…
Inclusion Criteria: * ages 18 and over * patients hospitalized in the ICU and developing cerebral vasospasm after aneurysmal subarachnoid hemorrhage Exclusion Criteria: \- known advanced stage kidney disease
All participants will get the cervical sympathetic block and catheter under ultrasound guidance.
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