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Comparison of Inching Electrodiagnosis Method and Ultrasonographic Findings in the Determination of Median Nerve Entrapment Site in Carpal Tunnel Syndrome.
Сравнительное исследованиеСтатьяНазвание и аннотация: Перевод в очереди
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Azadeh Asma, Vasaghi Attiyeh, Jalli Reza, Emad Mohammadreza
Аннотация
OBJECTIVE: The purpose of the study was to evaluate the diagnostic value of both inching method through the electrodiagnostic test and ultrasonographic assay in localizing the site of entrapment in patients with symptoms and signs of carpal tunnel syndrome.
DESIGN: Thirty-two hands with confirmed carpal tunnel syndrome through electrodiagnostic test and 30 hands as control group were enrolled. For both groups, sensory and motor latencies by inching technique and cross-sectional area by ultrasonography were measured at the inching points. The statistical analysis was performed by SPSS software, and mean difference with 95% confidence interval was calculated.
RESULTS: Mean of sensory peak latency with inching method and cross-sectional area by the ultrasonography was greater in case group compared with the control group (P < 0.05). We revealed a significant difference of antidromic sensory latency between two adjacent points belonging to the fifth and sixth segments. In orthodromic sensory and distal motor latency the sixth segment had statistically significant latency difference. Sixth and seventh points had the greatest cross-sectional area. Distal motor latency difference and cross-sectional area had the greatest sensitivity at the seventh point.
CONCLUSIONS: In this study, we revealed the most sites of entrapment of the median nerve through carpal tunnel are 2- and 3-cm distal to the distal wrist crease.
DESIGN: Thirty-two hands with confirmed carpal tunnel syndrome through electrodiagnostic test and 30 hands as control group were enrolled. For both groups, sensory and motor latencies by inching technique and cross-sectional area by ultrasonography were measured at the inching points. The statistical analysis was performed by SPSS software, and mean difference with 95% confidence interval was calculated.
RESULTS: Mean of sensory peak latency with inching method and cross-sectional area by the ultrasonography was greater in case group compared with the control group (P < 0.05). We revealed a significant difference of antidromic sensory latency between two adjacent points belonging to the fifth and sixth segments. In orthodromic sensory and distal motor latency the sixth segment had statistically significant latency difference. Sixth and seventh points had the greatest cross-sectional area. Distal motor latency difference and cross-sectional area had the greatest sensitivity at the seventh point.
CONCLUSIONS: In this study, we revealed the most sites of entrapment of the median nerve through carpal tunnel are 2- and 3-cm distal to the distal wrist crease.