Premium
A pilot study to monitor Graves' ophthalmopathy with a combination of pattern‐reversal and motion‐onset visual evoked potentials
Author(s) -
Szanyi Jana,
Kremlacek Jan,
Kubova Zuzana,
Langrova Jana,
Kuba Miroslav
Publication year - 2012
Publication title -
journal of clinical apheresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.697
H-Index - 46
eISSN - 1098-1101
pISSN - 0733-2459
DOI - 10.1002/jca.21243
Subject(s) - medicine , apheresis , visual evoked potentials , visual acuity , methylprednisolone , pulse (music) , evoked potential , audiology , ophthalmology , anesthesia , platelet , detector , electrical engineering , engineering
Objective: The aim of this pilot study was to evaluate the efficacy of visual evoked potentials (VEPs) in the monitoring of visual function during a high‐dose intravenous steroid pulse therapy and apheresis treatment of severe Graves' ophthalmopathy (GO). Patients and Research Design: Nine patients with severe and active GO were treated with high‐dose methylprednisolone (1 g day −1 three times within 1 week, then 0.5 g day −1 seven times for 2 weeks) combined with plasma filtration (twice a week in weeks 1, 2, 4, 7, and 10). Pattern‐reversal and motion‐onset VEPs were examined three times, pretreatment, after steroid pulses, and after the last apheresis. Results: After 10 steroid pulses, the visual acuity was significantly better and the pattern‐reversal VEP amplitudes (element size of only 20') had a similar trend for improvement. However, this effect disappeared after 7 weeks when only apheresis treatment was performed. No significant changes in the latencies of any of the tested VEP variants were found in relationship to the treatment. Conclusion: Only the observed large intraindividual variability of the VEP parameters between repeated examinations of patients with the shortest duration of GO might be recognized as a marker for functional changes of the visual pathway due to GO. Although this pilot study cannot provide a definite view on the usefulness of the extended set of VEPs in objective monitoring of GO, it seems that the steroid pulse therapy effect is detectable in contrast to the lack of influence by apheresis on the electrophysiological parameters tested. J. Clin. Apheresis 2012. © 2012 Wiley Periodicals, Inc.