[Carpal tunnel syndrome: clinical and epidemiological study in 668 cases].
Between January/1989 and June/1996, 1,059 carpal tunnel syndrome hands (CTS) from 668 patients were studied. None had been previously operated and all had bilateral conduction studies; peripheral neuropathy was excluded. The patients were selected with sensory median/radial difference (MRD) > or = 1.0 ms that strongly supports electrodiagnosis of CTS (standard deviation > 6) after stimulation on wrist and recording on thumb. Normal MRD were obtained in 125 hands with upper limit of normality = 0.43 ms (mean + 2 SD). The age ranged from 17 to 83 years (mean 47.5) and 91.3% were female; the complaints were bilateral in 72% and nocturnal/awakening in 85.3%. Pain, numbness and paraesthesia occurred in 64.4%; pain as the only symptom was rare but proximal extension was frequent (39.4%). All fingers were symptomatic in 42.5%, followed by middle, middle-ring, thumb-index-middle and then index-middle-ring ones. There was no correlation with traumatic past history on wrist. The duration CTS symptoms ranged from 1 to > 120 months. Diabetes mellitus was present in 4.4% even after peripheral neuropathy exclusion.
Departamento de Ciências Neurológicas, Faculdade de Medicina de São José do Rio Preto, Brasil. jaris@zaz.com.br.b
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JA
Kouyoumdjian
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D001938:Brazil / Q000453:epidemiology; D002349:Carpal Tunnel Syndrome / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology; D008875:Middle Aged; D009431:Neural Conduction / Q000502:physiology; D011446:Prospective Studies; D012189:Retrospective Studies; D017678:Sex Distribution
Síndrome do túnel do carpo. Aspectos clínico-epidemiológicos em 668 casos.