Objective. To determine ICP changes in patients with Chiari type I malformation after posterior fossa reconstruction (PFR). Patients and Methods. We continuously monitored ICP before and after PFR in 12 patients with Chiari I malformation and with an Evans' Index below or equal to 0.33. Mean ICP (epidural sensor) and percentage of B waves were calculated 24 hours before surgery and during the first 7 days after surgery. Results. Mean ICP and percentage of B waves significantly increased after surgery despite a significant increase in the volume of the posterior fossa. The main finding revealed by control CT scans was compression of the quadrigeminal cistern with a reduction in size of the fourth ventricle. In six patients, a small transitory increase in supratentorial ventricular size was found. Conclusions. A transitory increase in ICP is common after PFR. This increase could be explained by an initial reperfusion phenomena in the cerebellum that provokes a transitory deterioration in CSF dynamics. The effacement of the quadrigeminal cistern and the reduction in size of the fourth ventricle suggests this hypothesis. © Springer-Verlag 2002.
CITATION STYLE
Poca, M. A., Sahuquillo, J., Ibañez, J., Amorós, S., Arikan, F., & Rubio, E. (2002). Intracranial hypertension after surgery in patients with Chiari I malformation and normal or moderate increase in ventricular size. Acta Neurochirurgica, Supplement, 81, 35–38. https://doi.org/10.1007/978-3-7091-6738-0_9
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