Archives of physical medicine and rehabilitation · 2005
Sensitivity, specificity, and variability of nerve conduction velocity measurements in carpal tunnel syndrome.
Клиническое исследованиеКонтролируемое клиническое исследованиеСтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Lew Henry L, Date Elaine S, Pan Steven S, Wu Peter, Ware Paul F, Kingery Wade S
Аннотация
OBJECTIVE: To explore the diagnostic values of 8 commonly used electrodiagnostic techniques for measuring median nerve conduction velocity (NCV) in carpal tunnel syndrome (CTS).
DESIGN: Sensitivity and specificity analyses.
SETTING: A hospital-based electrodiagnostic laboratory.
PARTICIPANTS: Forty-four normal hands and 136 symptomatic hands.
INTERVENTIONS: Not applicable.
MAIN OUTCOME MEASURES: (1) Long-segment studies: antidromic wrist-to-digit sensory NCV without subtraction, (2) short-segment studies: transcarpal palm-to-wrist mixed NCV without subtraction, and (3) 2 segment studies: antidromic transcarpal sensory NCV with subtraction (differential calculation from wrist-to-digit and palm-to-digit segments). Both onset and peak latency values were obtained for calculating the NCV. Sensitivity, specificity, and coefficient of variance were calculated for each NCV study.
RESULTS: The short-segment, onset latency-based transcarpal mixed NCV yielded the highest sensitivity (75%).
CONCLUSIONS: Results from measurement of a single, short-nerve segment tended to be superior to results obtained by either long-segment studies or differential subtraction between 2 segments of the same nerve in the electrodiagnosis of CTS. Explanations for our results are offered from both electrophysiologic and statistical perspectives.
DESIGN: Sensitivity and specificity analyses.
SETTING: A hospital-based electrodiagnostic laboratory.
PARTICIPANTS: Forty-four normal hands and 136 symptomatic hands.
INTERVENTIONS: Not applicable.
MAIN OUTCOME MEASURES: (1) Long-segment studies: antidromic wrist-to-digit sensory NCV without subtraction, (2) short-segment studies: transcarpal palm-to-wrist mixed NCV without subtraction, and (3) 2 segment studies: antidromic transcarpal sensory NCV with subtraction (differential calculation from wrist-to-digit and palm-to-digit segments). Both onset and peak latency values were obtained for calculating the NCV. Sensitivity, specificity, and coefficient of variance were calculated for each NCV study.
RESULTS: The short-segment, onset latency-based transcarpal mixed NCV yielded the highest sensitivity (75%).
CONCLUSIONS: Results from measurement of a single, short-nerve segment tended to be superior to results obtained by either long-segment studies or differential subtraction between 2 segments of the same nerve in the electrodiagnosis of CTS. Explanations for our results are offered from both electrophysiologic and statistical perspectives.