Clinical experience with a continuous monitor of intracranial compliance

• DOI: 10.3171/jns.1989.71.5.0673
• Publication Date: 2009-05-08T16:18:16Z
• Authors: Claudia S. Robertson; Raj K. Narayan; Charles F. Contant; Robert G. Grossman; Ziya L. Gokaslan; Rajesh Pahwa; Pedro Caram; Robert S. Bray; Arthur M. Sherwood
• Keywords: Intracranial pressure monitoring

Intracranial compliance, as estimated from a computerized frequency analysis of the intracranial pressure (ICP) waveform, was continuously monitored during acute postinjury phase in 55 head-injured patients. In previous studies, high-frequency centroid (HFC), which defined power-weighted average within 4- to 15-Hz band ICP power density spectrum, found inversely correlate with pressure-volume index (PVI). An HFC 6.5 7.0 Hz normal, while an increase 9.0 coincided reduction PVI 13 ml and indicated exhaustion volume-buffering capacity. The mean for individual patients present study ranged 6.8 Hz, length time that greater than 0 104.8 hours. mortality rate increased concomitantly HFC, 7% when less 7.5 46% 8.5 or greater. also associated rate, 16% if never above 60% more 12 who developed uncontrollable hypertension clinical signs tentorial herniation monitoring period, 75% were observed have had 1 36 hours prior decompensation. rapid likely deterioration be caused by hematoma. Continuous compliance waveform may provide earlier warning neurological decompensation per se and, unlike PVI, does not require volumetric manipulation volume.