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KMID : 0361419850090020131
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Journal of Korean Academy of Rehabilitation Medicine
1985 Volume.9 No. 2 p.131 ~ p.137
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A Clinical Study for the Diagnosis of Carpal Tunnel Syndrome using Somatosensory Evoked Potential Test
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Abstract
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For the evaluation of severity of involvement in carpal tunnel syndrome patients, who could not be evaluated the severity by ordinary nerve conduction study due to absence of sensory nerve action potential, the somatosensory evoked potential test was done in 14 patients, 20 hands as well as ordinary sensory nerve conduction study.
The results were:
1) In somatosensory evoked potential test for diagnosis of carpal tunnel syndrome, it is suggested that the N 1 latency is the most important criterion.
2) The N 1 latency over 22. 5 msec at index finger stimulation seems to be significant in the diagnosis of carpal tunnel syndrome.
3) Difference over 4.5 msec between the N 1 latency at median nerve stimulation and one at index finger stimulation in the same hand seems to be significant in the diagnosis of carpal tunnel syndrome.
4) If the sensory nerve action potential has no response, differences between the N I latencies at median nerve and index finger stimulation seems to give the information for severity of carpal tunnel syndrome.
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