Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study

Abstract Background In addition to nerve conduction studies (NCSs), ultrasonography has been widely used as an alternative tool for diagnosing carpal tunnel syndrome (CTS). Although the results of NCSs are influenced by local skin temperature, few studies have explored the effects of skin temperatur...

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Autores principales:	Yi-Wei Chang, Chii-Jen Chen, You-Wei Wang, Valeria Chiu, Shinn-Kuang Lin, Yi-Shiung Horng
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Carpal tunnel syndrome Ultrasonography Power Doppler Skin temperature Blood flow Medical technology R855-855.5
Acceso en línea:	https://doaj.org/article/825ac35b61bd4787939c881388f99814
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spelling	oai:doaj.org-article:825ac35b61bd4787939c881388f998142021-11-08T11:05:04ZInfluence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study10.1186/s12880-021-00700-61471-2342https://doaj.org/article/825ac35b61bd4787939c881388f998142021-11-01T00:00:00Zhttps://doi.org/10.1186/s12880-021-00700-6https://doaj.org/toc/1471-2342Abstract Background In addition to nerve conduction studies (NCSs), ultrasonography has been widely used as an alternative tool for diagnosing carpal tunnel syndrome (CTS). Although the results of NCSs are influenced by local skin temperature, few studies have explored the effects of skin temperature on ultrasonography of the median nerve. Since swelling and intraneural blood flow of the median nerve might be influenced by local temperature changes, the aim of this study was to evaluate the cross-sectional area (CSA) and intraneural blood flow of the median nerve under three skin temperatures (30 °C, 32 °C, 34 °C). Methods Fifty patients with CTS and 50 healthy volunteers were consecutively recruited from a community hospital. Each participant received physical examinations and NCSs and underwent ultrasonography, including power Doppler, to evaluate intraneural vascularity. Results The CSA of the median nerve in the CTS patients was significantly larger than that in the healthy controls at all three temperatures. However, significant differences in the power Doppler signals of the median nerve between the two studied groups were observed only at 30 and 32 °C, not at 34 °C. Conclusion The significant difference in the intraneural vascularity of the median nerve between the patients with CTS and the healthy subjects was lost at higher temperatures (34 °C). Therefore, the results of power Doppler ultrasonography in diagnosing CTS should be cautiously interpreted in patients with a high skin temperature or those who reside in warm environments.Yi-Wei ChangChii-Jen ChenYou-Wei WangValeria ChiuShinn-Kuang LinYi-Shiung HorngBMCarticleCarpal tunnel syndromeUltrasonographyPower DopplerSkin temperatureBlood flowMedical technologyR855-855.5ENBMC Medical Imaging, Vol 21, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Carpal tunnel syndrome Ultrasonography Power Doppler Skin temperature Blood flow Medical technology R855-855.5
spellingShingle	Carpal tunnel syndrome Ultrasonography Power Doppler Skin temperature Blood flow Medical technology R855-855.5 Yi-Wei Chang Chii-Jen Chen You-Wei Wang Valeria Chiu Shinn-Kuang Lin Yi-Shiung Horng Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
description	Abstract Background In addition to nerve conduction studies (NCSs), ultrasonography has been widely used as an alternative tool for diagnosing carpal tunnel syndrome (CTS). Although the results of NCSs are influenced by local skin temperature, few studies have explored the effects of skin temperature on ultrasonography of the median nerve. Since swelling and intraneural blood flow of the median nerve might be influenced by local temperature changes, the aim of this study was to evaluate the cross-sectional area (CSA) and intraneural blood flow of the median nerve under three skin temperatures (30 °C, 32 °C, 34 °C). Methods Fifty patients with CTS and 50 healthy volunteers were consecutively recruited from a community hospital. Each participant received physical examinations and NCSs and underwent ultrasonography, including power Doppler, to evaluate intraneural vascularity. Results The CSA of the median nerve in the CTS patients was significantly larger than that in the healthy controls at all three temperatures. However, significant differences in the power Doppler signals of the median nerve between the two studied groups were observed only at 30 and 32 °C, not at 34 °C. Conclusion The significant difference in the intraneural vascularity of the median nerve between the patients with CTS and the healthy subjects was lost at higher temperatures (34 °C). Therefore, the results of power Doppler ultrasonography in diagnosing CTS should be cautiously interpreted in patients with a high skin temperature or those who reside in warm environments.
format	article
author	Yi-Wei Chang Chii-Jen Chen You-Wei Wang Valeria Chiu Shinn-Kuang Lin Yi-Shiung Horng
author_facet	Yi-Wei Chang Chii-Jen Chen You-Wei Wang Valeria Chiu Shinn-Kuang Lin Yi-Shiung Horng
author_sort	Yi-Wei Chang
title	Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
title_short	Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
title_full	Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
title_fullStr	Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
title_full_unstemmed	Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
title_sort	influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study
publisher	BMC
publishDate	2021
url	https://doaj.org/article/825ac35b61bd4787939c881388f99814
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Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study

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