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KMID : 1035220180100020032
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Korean Journal of Neuromuscular Disorders
2018 Volume.10 No. 2 p.32 ~ p.36
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Posterior Tibial Somatosensory Evoked Potential as a Prognostic Factor in Spinal Cord Decompression Sickness
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Lee Seung-Hyun
Kim Jee-Eun
Kim Hee-Tae
Ahn Jin-Young
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Abstract
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Background: Somatosensory evoked potentials are the electrical potentials generated in sensory pathways at peripheral, spinal, subcortical and cortical levels of the nervous system. Such electrical potential is frequently used to evaluate myelopathy. This study aims to determine the utility of initial posterior tibial somatosensory evoked potential (PTSEP) as a prognostic factor associated with the development of severe diving-related spinal cord decompression sickness (DCS).
Methods: In order to conduct the study, 68 injured divers presenting the symptoms of spinal cord DCS from Seoul Medical Center were included in the study. The patients were divided into two groups normal PTSEP group (n=34) and abnormal PTSEP group (n=34). Diving information, time interval between symptom onset and hyperbaric treatment were studied and analyzed accordingly. The initial severity of spinal cord DCS were then rated using the Boussuges severity score and muscle power examination. The presence of sequelae was evaluated at 2 weeks. Initial recompression treatment at 2.8-4 ATA (atmospheres absolute) with 100% oxygen breathing or deeper recompression.
Results: Analysis of the results showed that there were no significant differences between each group in age, diving experience, depth of dive, bottom time of dive, onset to treatment, Boussuges’s score and the grade of motor power before the treatment. Marked motor power improvements were noticed in initial normal PTSEP group (70.6%) than abnormal group (29.4%). There were significant differences in degrees of motor power improvement between two groups (p=0.003).
Conclusions: Initial PTSEP can be a useful prognostic factor in spinal type DCS.
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KEYWORD
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Decompression sickness, Evoked potentials, somatosensory, Hyperbaric oxygenation
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