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Journal of Korean Neurosurgical Society > Volume 26(2); 1997 > Article
Journal of Korean Neurosurgical Society 1997;26(2): 202-207.
Radioisotope Cisternographic Analysis of Post-operative Subdural Hygroma after Aneurysmal Surgery.
Byung Gil Woo, Byung Yon Choi, Seong Ho Kim, Jang Ho Bae, In Ho Cho, Oh Lyong Kim, Soo Ho Cho
1Department of Neurosurgery, College of Medicine, Yeungnam University, Taegu, Korea.
2Department of Neuclear Medicine, College of Medicine, Yeungnam University, Taegu, Korea.
ABSTRACT
Authors analyzed the post-operative subdural hygroma using radioisotope(RI) cisternography in 30 cases following aneurysmal surgery with pterional approach from October, 1995 to March, 1996. Age, CSF flow from basal cisterns, and etent of opening of Liliequist's membrane during operation were significantly related to the development of post-operative subdural hygroma. Computed tomography(CT) scan of brain and RI cisternography were performed in all patients at three weeks following operations. RI diffusion time from the interpeduncular cistern to the cerebral convexity of ipsilateral side with surgically opened Liliequist's membrane was compared with contralateral nonoperated normal side. Diffusion time of ipsilateral side(mean 5.2+/-8.4hr) was faster than that of contralateral one. Age, cerebrospinal fluid(CSF) from basal cistern, and extent of opening of Liliequist's membrane during operation were significantly related to development of post-operative subdural hygroma. Development of subdural hygroma after pterional approach for aneurysmal operations in our series is believed to be caused by stagnation of CSF in the convexity until its absorption into the arachnoid villi. Increased CSF flow from the infratentorial space to the supratentorial space through extensively opened Liliequist's membrane is considered to contribute development of its formation.
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