Tisdall, M.; Russo, S.; Sen, J.; Belli, A.; Ratnaraj, N.; Patsalos, P.; Petzold, A.; ... Smith, M.; + view all Tisdall, M.; Russo, S.; Sen, J.; Belli, A.; Ratnaraj, N.; Patsalos, P.; Petzold, A.; Kitchen, N.; Smith, M.; - view fewer (2006) Free phenytoin concentration measurement in brain extracellular fluid: a pilot study. British Journal of Neurosurgery , 20 (5) pp. 285-289. 10.1080/02688690600999786.

Preview

PDF 2467.pdf Download (257kB)

Abstract

This article investigates the relationship between brain extracellular fluid free phenytoin concentration and plasma free phenytoin concentration in adults with acute brain injury. Daily cerebral microdialysate free phenytoin concentration was measured in eight adults with acute brain injury and compared with simultaneous measurement of plasma free phenytoin concentration. The group data revealed no significant correlation between microdialysate and plasma free phenytoin concentration (r¼0.34, p¼0.41). However, in two patients, with a sufficient number of samples for intra-individual analysis, there was a significant correlation between microdialysate and plasma free phenytoin concentration (r¼0.92, p50.001 and r¼0.88, p50.01). In vitro microdialysis relative recovery for phenytoin was 2.1%. In the context of acute brain injury, measurement of free plasma phenytoin concentration may not provide an accurate reflection of regional brain extracellular fluid free phenytoin concentration and may have limitations with respect to achieving reproducible brain extracellular fluid free phenytoin concentrations. This has implications for dosing regimens relying on plasma phenytoin levels.

Download activity - last month

Export as JSONCSVXML

Download activity - last 12 months

Export as JSONCSVXML

Downloads by country - last 12 months

Export as JSONCSVXML

Archive Staff Only

View Item