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  • Reversal of Symptomatic Cerebral Vasospasm after Aneurysmal Subarachnoid Hemorrhage by Continuous Lumbar Drainage: Evidence on Study of Perfusion Computed Tomography

    Final Number:

    Kuo-Wei Chen (1); Kuo-Chuan Wang (2); Dar-Ming Lai (2); Jui-Chang Tsai (2)

    Study Design:

    Subject Category:

    Meeting: Congress of Neurological Surgeons 2015 Annual Meeting

    Introduction: Symptomatic cerebral vasospasm, also called delayed neurological deficit (DIND) is one of the devastating complications after aneurysmal subarachnoid hemorrhage (SAH). Studies have shown lumbar drainage (LD) is a safe and effective way to clear the subarachnoid hemorrhage and reduce the incidence of vasospasm1. However, whether lumbar drainage could be a therapeutic modality in DIND is unknown. Our aim is to compare the change of cerebral perfusion of the patients suffering from DIND before and after lumbar drainage by using perfusion computed tomography.

    Methods: During a 1.5-year period, between 2010 January and 2011 July 54 patients with aneurysmal SAH were treated at our center. All patients had perfusion computed tomography (CTP) and CT angiography (CTA) at diagnosis, on the day DIND developed and then three days after LD. Changes of cerebral blood flow (CBF) and mean transit time (MTT) was analyzed and correlated with outcome.

    Results: During a 1.5-year period, there were 54 patients with aSAH treated at our hospital. Forty one (76%) sustained Fisher grade III or IV SAH, and 18 (44%) of them developed delayed ischemic neurological deficit (DIND). Ten patients (55.5%) failed triple H therapy, and three of them were excluded. All patients suffered from perfusion impairment. There were six patients developed angiographic vasospasm. One patient did no have evidence of vascular constriction also suffered from perfusion deficit, which implied the large vascular constriction is not the culprit of perfusion impairment. After lumbar drainage, the degree of angiographic vasospasm was relieved partially in five patients. The degree of vasospasm remained unchanged in one patient. Nonetheless, all patients experienced perfusion improvement.

    Conclusions: The pathophysiology of DIND is complex and vascular constriction could only plays a partial role. Lumbar drainage could improve the perfusion of the patients suffer from DIND and may also reverse vasospasm. It could also benefit the patients without angiographic vasospasm.

    Patient Care: Lumbar drainage should be considered for those patient suffering from DIND.

    Learning Objectives: By the conclusion of this session, participants should be able to: 1) Be aware of that the pathophysiology of DIND is multifactorial and some patients may experienced DIND and perfusion deficit without evident vasospasm, 2) Lumbar drainage may reverse the perfusion deficit. "

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