Abstract
A Neurometer device is an electrical nerve stimulator used to determine the current perception threshold (CPT) evoked by stimulating A-beta fibers at 2,000 Hz, A-delta fibers at 250 Hz and C fibers at 5 Hz. CPT evaluation is used for analyzing peripheral nerve dysfunction. In this study, the sensory disturbance of the lower-extremity was quantitatively analyzed using CPT testing before and after lumbar discectomy. In 33 patients (L4/5: 16 and L5/S: 17), as subjective evaluations, tactile sensation and leg pain were assessed before and 2 weeks after surgery. In the subjectively improved group (n = 22), significant decreases in CPT at 2,000 and 250 Hz were noted postoperatively, whereas in the unchanged group (n = 11), no significant changes in CPT at any frequencies was noted. The leg pain improved in all patients. Likewise, CPT at 5 Hz, which stimulated C fiber, decreased significantly for both improved and unchanged groups. CPT measured by a Neurometer is very useful in assessing lower-extremity sensory functions before and after surgery for lumbar disc herniation.
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References
Chado HN (1995) The current perception threshold evaluation of sensory nerve function in pain management. Pain Digest 5:127–134
Chu N-S (1996) Current perception threshold in toe-to-digit transplantation and digit-to-digit replantation. Muscle Nerve 19:183–186
Katims JJ, Long DM, Ng LK (1986) Transcutaneous nerve stimulation: frequency and waveform specificity in humans. Appl Neurophysiol 49:86–91
Katims JJ, Mitsuhata H, Miyazaki T (1998) Electrodiagnostic evaluation of sensory nerve function in the patient with pain: neuroselective current perception threshold (CPT) and pain tolerance threshold (PTT). Pain Clinic 19:535–549
Katims JJ, Naviasky EH, Rendell MS, Ng LK, Bleecker ML (1987) Constant current sine wave transcutaneous nerve stimulation for the evaluation of peripheral neuropathy. Arch Phys Med Rehabil 68:210–213
Katims JJ, Rouvelas P, Sadler BT, Weseley SA (1989) Reproducibility and comparison with nerve conduction in evaluation of carpal tunnel syndrome. Trans Am Soc Artif Intern Organs 35:280–283
Katims JJ, Patil AS, Rendell MS et al. (1991) Current perception threshold screening for carpal tunnel syndrome. Arch Environ Health 46:207–212
Masson EA, Boulton AJM (1991) The Neurometer: validation and comparison with conventional tests for diabetic neuropathy. Diab Med 8:563–566
Masson EA, Veves A, Fernando D, Boulton AJM (1989) Current perception threshold: A new, quick, and reproducible method for assessment of peripheral neuropathy in diabetes mellitus. Diabetology 32:724–728
Pelmear PL, Kusiak R (1994) Clinical assessment of hand-arm vibration syndrome. Nagoya J Med Sci 57(Suppl):27–41
Pitei DL, Watkins PJ, Stevens MJ, Edmonds ME (1994) The value of the Neurometer CPT in assessing diabetic neuropathy by measurement of the current perception threshold. Diab Med 11:872–876
Rendell MS, Dovgan DJ, Bergman TF, O’Donnel GP, Drobny EP, Katims JJ (1989) Mapping diabetic sensory neuropathy by current perception threshold testing. Diab Care 12:636–640
Yamashita T, Kanaya K, Sekine M, Takebayashi T, Kawaguchi S, Katahira G (2002) A quantitative analysis of sensory function in lumbar radiculopathy using current perception threshold testing. Spine 27:1567–1570
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This study was supported by the Yuasa Memorial Foundation (2003 Research Grant).
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Imoto, K., Takebayashi, T., Kanaya, K. et al. Quantitative analysis of sensory functions after lumbar discectomy using current perception threshold testing. Eur Spine J 16, 971–975 (2007). https://doi.org/10.1007/s00586-006-0285-7
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DOI: https://doi.org/10.1007/s00586-006-0285-7