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TABLE 2: Patients with changes in results of neurophysiological monitoring or NPM or clinical examination during endovascular procedures
Patient No. General Anesthesia (Y/N)^* NPM Changes (Y/N) PE Changes (Y/N) Altered Management (Y/N) Type of Alteration/Reason for No Alteration
4 Y Y N N Coil loop protruding from aneurysm; coil not withdrawn
5 N Y N Y Delayed PVO to allow EC-IC graft maturation
7 Y Y N Y Increased mean arterial pressure to improve perfusion
9 Y Y N N Aneurysm perforation; proceeded with treatment
11 Y Y N Y PVO of right vertebral instead of basilar artery
26 Y Y N Y No coil detachment
27 Y Y N Y No coiling or PVO
29 Y Y N N Aneurysm perforation; proceeded with treatment
30 Y Y N N NPM changes at end of procedure
10 N N Y Y No PVO
33 N N Y Y No PVO
Note.—Y indicates yes; N, no; NPM, neurophysiological monitoring; PE, physical examination; PVO, permanent vessel occlusion; EC-IC, extracranial-intracranial.
* Balloon test occlusion was performed with the patient under conscious sedation when possible; permanent vessel occlusion or aneurysm coiling was then performed with the patient under general anesthesia.