Please use this identifier to cite or link to this item:
|Title:||Variability of somatosensory evoked potential monitoring during scoliosis surgery|
Mean arterial pressure
Somatosensory evoked potential
|Citation:||Chen, Z.-Y., Wong, H.-K., Chan, Y.-H. (2004-12). Variability of somatosensory evoked potential monitoring during scoliosis surgery. Journal of Spinal Disorders and Techniques 17 (6) : 470-476. ScholarBank@NUS Repository. https://doi.org/10.1097/01.bsd.0000133465.89618.c8|
|Abstract:||Objective: Somatosensory evoked potentials (SEPs) of 65 patients undergoing scoliosis surgery were monitored by stimulation of posterior tibial nerve to observe variations in latencies and amplitudes. Methods: Monitoring was divided into five stages: pre incision, spine exposure, instrumentation loading, deformity correction, and wound closure (stages 1-5, respectively). Results: We found the latency showed significant increase and the amplitude significant reduction from stages 1 to 2. There was no significant variability from stages 2, 3, and 4, but both latency and amplitude recovered significantly from stage 4 to 5. This variability correlated with the changes in mean arterial pressure and end-tidal concentrations of isoflurane and was not dependent on the type of surgical procedure. If either 50% amplitude reduction or 10% latency prolongation of SEP compared with baseline recordings at stage 1 (pre incision) was used as warning criterion, the overall false-positive rate was 23.1%. It was significantly reduced to 7.7% if stage 2 (spine exposure) recordings were used as the baseline (P < 0.05). The false-positive rate decreased to 0% if a combined 50% amplitude reduction and 10% latency prolongation of SEP compared with the stage 2 baseline were used (P < 0.001). Conclusion: Based on these findings, we concluded that the time to obtain SEP baseline data should be adjusted to be post incision instead of pre incision. Copyright © 2004 by Lippincott Williams & Wilkins.|
|Source Title:||Journal of Spinal Disorders and Techniques|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on May 26, 2018
WEB OF SCIENCETM
checked on Mar 27, 2018
checked on Mar 11, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.