Raftopoulos C, Balériaux D, Chaskis C, Delecluse F, Brotchi J
Department of Neurosurgery, University Hospital Erasme, Free University of Brussels, Belgium.
Neurosurg Rev. 1992;15(3):199-201. doi: 10.1007/BF00345932.
Magnetic resonance imaging demonstrates after ventricular catheterization a focal brain hypersignal corresponding to a parenchymal edema along the drain track. In the course of our daily clinical activity, this hypersignal extension seemed more pronounced when catheterizing the frontal area than the junctional parieto-temporo-occipital parenchyma (or trigonal area). In order to confirm this impression, we prospectively studied ten consecutive patients with normal pressure hydrocephalus in whom both of these brain regions were successively catheterized first by a frontal puncture for intracranial pressure monitoring and then by a trigonal one for a ventricular shunt. Each patient was evaluated by serial magnetic resonance imaging. The extension of the hypersignal induced by both catheterizations was estimated on a scale of five grades (0 to 4) of hypersignal extension. A statistically significant more important hypersignal extension was demonstrated at the level of frontal area when compared to the trigonal one. We discuss the likely underlying mechanisms of this phenomenon.
磁共振成像显示，脑室置管后出现局灶性脑高信号，对应引流道沿线的实质水肿。在我们日常的临床活动中，当在额叶区域置管时，这种高信号的延伸似乎比顶颞枕交界实质（或三角区）更明显。为了证实这一印象，我们前瞻性地研究了10例连续的正常压力脑积水患者，在这些患者中，这两个脑区先后通过额叶穿刺进行颅内压监测，然后通过三角区穿刺进行脑室分流。对每位患者进行了系列磁共振成像评估。根据高信号延伸的五个等级（0至4级）评估两次置管引起的高信号延伸情况。与三角区相比，额叶区域的高信号延伸在统计学上更显著。我们讨论了这种现象可能的潜在机制。
