梗阻性脑积水行三脑室底造瘘术脑池显像分析

目的了解梗阻性脑积水行三脑室底造瘘术后脑池显像的表现。方法15例梗阻性脑积水患者行神经内窥镜下三脑室底造瘘术前后均行脑池显像，比较其前后的差异。结果梗阻性脑积水患者在三脑室底造瘘术后脑池显像有放射性药物返流入侧脑室内，并且延迟清除，类似于交通性脑积水的脑池显像表现。结论放射性药物返流入侧脑室的原因尚不清楚．三脑室底造瘘术治疗梗阻性脑积水后脑脊液的流动可能存在“返转”现象。

Third ventriculostomy for obstructive hydrocephalus: findings in radioisotope cisternography

objective: To study the findings in radionuclide cisternography in patients with obstructive hydrocephalus following third ventriculostomy. Methods Lumbar radionuclide cisternography was performed in 15 patients with obstructive hydro- cephalus before and after third ventriculostomy. Results The postoperative cisternography identified radiopharmaceutical reflux into the lateral cerebral ventricles with delayed clearance for 24 h, similar to the findings by cisternography of communicating hydrocephalus. Conclusion The cause of ventricular radiopharmaceutical reflux is not yet understood, possibly in association with the reversal of normal cerebrospinal fluid flow though the fenestration on the third ventrical floor.