Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome

Murat Alemdar Sakarya University Education and Research Hospital, Sakarya, Turkey Background: F waves are late electrophysiological responses to antidromic activation of motor neurons and are used to evaluate the conduction along the whole length of peripheral nerves. We aimed to determine the dia...

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Autor principal:	Alemdar M
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/14e5baceba064d228d769363a469cf90
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spelling	oai:doaj.org-article:14e5baceba064d228d769363a469cf902021-12-02T08:47:15ZValue of F-wave studies on the electrodiagnosis of carpal tunnel syndrome1178-2021https://doaj.org/article/14e5baceba064d228d769363a469cf902015-08-01T00:00:00Zhttp://www.dovepress.com/value-of-f-wave-studies-on-the-electrodiagnosis-of-carpal-tunnel-syndr-peer-reviewed-article-NDThttps://doaj.org/toc/1178-2021Murat Alemdar Sakarya University Education and Research Hospital, Sakarya, Turkey Background: F waves are late electrophysiological responses to antidromic activation of motor neurons and are used to evaluate the conduction along the whole length of peripheral nerves. We aimed to determine the diagnostic efficacies of minimum median nerve F-wave latency (FWL) and median-to-ulnar nerve F-wave latency difference (FWLD) on carpal tunnel syndrome (CTS). Materials and methods: The electrophysiological studies consisted of sensory and motor nerve conduction and F-wave studies of the median and ulnar nerves. The best cut-off points of minimum median nerve FWL and FWLD for the diagnosis of CTS were detected for the whole study group and for different height subgroups (Group 1: 150–159 cm, Group 2: 160–169 cm, and Group 3: over 170 cm). The diagnostic efficacies of minimum median nerve FWL and FWLD were calculated for the whole CTS group and for the mild CTS group, separately. Results: The best cut-off point of minimum median nerve FWL on the diagnosis of CTS was determined as 24.60 ms for the whole group. It was 23.90 ms for Group 1, 24.80 ms for Group 2, and 28.40 ms for Group 3. The usage of these stratified cut-off points yielded a higher total diagnostic efficacy rate than single cut-off point usage (79.9% vs 69%, respectively; P=0.02). The best cut-off point of FWLD on the diagnosis of CTS was 0.80 ms for the whole group. It was 0.55 ms for Group 1, 0.30 ms for Group 2, and 0.85 ms for Group 3. Both the single cut-off point usage and the stratified chart usage for FWLD had equal diagnostic efficacy (85.1%). In the mild CTS group, diagnostic efficacy was 55.5% for minimum median nerve FWL and 78.8% for FWLD (P=0.0001). Conclusion: Median-to-ulnar nerve FWLD yields a higher diagnostic efficacy than minimum median nerve FWL on the diagnosis of CTS. However, the sensitivities of both parameters are not satisfactory for the extremities with mild CTS, which compose the main group having diagnostic challenge. Keywords: carpal tunnel syndrome, median nerve, F-waveAlemdar MDove Medical PressarticleNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol 2015, Iss default, Pp 2279-2286 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
spellingShingle	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 Alemdar M Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome
description	Murat Alemdar Sakarya University Education and Research Hospital, Sakarya, Turkey Background: F waves are late electrophysiological responses to antidromic activation of motor neurons and are used to evaluate the conduction along the whole length of peripheral nerves. We aimed to determine the diagnostic efficacies of minimum median nerve F-wave latency (FWL) and median-to-ulnar nerve F-wave latency difference (FWLD) on carpal tunnel syndrome (CTS). Materials and methods: The electrophysiological studies consisted of sensory and motor nerve conduction and F-wave studies of the median and ulnar nerves. The best cut-off points of minimum median nerve FWL and FWLD for the diagnosis of CTS were detected for the whole study group and for different height subgroups (Group 1: 150–159 cm, Group 2: 160–169 cm, and Group 3: over 170 cm). The diagnostic efficacies of minimum median nerve FWL and FWLD were calculated for the whole CTS group and for the mild CTS group, separately. Results: The best cut-off point of minimum median nerve FWL on the diagnosis of CTS was determined as 24.60 ms for the whole group. It was 23.90 ms for Group 1, 24.80 ms for Group 2, and 28.40 ms for Group 3. The usage of these stratified cut-off points yielded a higher total diagnostic efficacy rate than single cut-off point usage (79.9% vs 69%, respectively; P=0.02). The best cut-off point of FWLD on the diagnosis of CTS was 0.80 ms for the whole group. It was 0.55 ms for Group 1, 0.30 ms for Group 2, and 0.85 ms for Group 3. Both the single cut-off point usage and the stratified chart usage for FWLD had equal diagnostic efficacy (85.1%). In the mild CTS group, diagnostic efficacy was 55.5% for minimum median nerve FWL and 78.8% for FWLD (P=0.0001). Conclusion: Median-to-ulnar nerve FWLD yields a higher diagnostic efficacy than minimum median nerve FWL on the diagnosis of CTS. However, the sensitivities of both parameters are not satisfactory for the extremities with mild CTS, which compose the main group having diagnostic challenge. Keywords: carpal tunnel syndrome, median nerve, F-wave
format	article
author	Alemdar M
author_facet	Alemdar M
author_sort	Alemdar M
title	Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome
title_short	Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome
title_full	Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome
title_fullStr	Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome
title_full_unstemmed	Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome
title_sort	value of f-wave studies on the electrodiagnosis of carpal tunnel syndrome
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/14e5baceba064d228d769363a469cf90
work_keys_str_mv	AT alemdarm valueoffwavestudiesontheelectrodiagnosisofcarpaltunnelsyndrome
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Value of F-wave studies on the electrodiagnosis of carpal tunnel syndrome

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