Gender differences in carpal tunnel relative cross-sectional area: a possible causative factor in idiopathic carpal tunnel syndrome

Sassi, Sami; Giddins, Grey

doi:10.1177/1753193415625404

Cited by 36 publications

(28 citation statements)

References 13 publications

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“…This sex difference was still valid with the normalization of carpal arch area with respect to wrist size to control the potential confounding factor that females tend to have a smaller wrist. Previous studies have shown that women have smaller carpal tunnel cross-sectional area compared to men at both distal and proximal ends of the tunnel [3, 4]. Our study extended the previous findings of smaller carpal tunnel area in women compared to men as reported to the sex-related differences in carpal arch.…”

Section: Discussionsupporting

confidence: 89%

“…One possible cause proposed for the higher incidence is that women have a smaller wrist size than men [2]. The smaller wrist size in women also correlates with a relatively smaller carpal tunnel cross-sectional area in women compared to men [3, 4]. However, there were no sex-related differences in the relative carpal tunnel contents area [5, 6].…”

Section: Introductionmentioning

confidence: 99%

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Sex-related differences in carpal arch morphology

Lakshminarayanan

Shah

2019

PLoS ONE

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The purpose of this study was to investigate the sex-based differences in the carpal arch morphology. Carpal arch morphology was quantified using palmar bowing and area of the arch formed by the transverse carpal ligament. The carpal arch was imaged at the distal and proximal tunnel levels using ultrasonography in 20 healthy young adults (10 women and 10 men). It was found that females had a smaller carpal arch height compared to men at both distal and proximal levels (p<0.05) and smaller carpal arch width only at the proximal level (p<0.05) but not distally. Palmar bowing index, the carpal arch height to width ratio, was significantly smaller in females at the distal level (p<0.05) but not at the proximal level. Carpal arch cross-sectional area normalized to the wrist cross-sectional area was found to be significantly smaller in females at both tunnel levels compared to men (p<0.05). This study demonstrates that females have a smaller carpal arch compared to men with a reduced palmar bowing distally and a smaller arch area at both tunnel levels. The findings help explain the higher incidence of carpal tunnel syndrome in women as a smaller carpal arch makes the median nerve more vulnerable to compression neuropathy.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Sex-related differences in carpal arch morphology

Lakshminarayanan

Shah

2019

PLoS ONE

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“…7 , 8) This study demonstrates the changes in the median nerve among only young male participants. In comparison, carpal tunnel volume of female individuals is smaller than that of male individuals, 44) which may affect the deformation of the median nerve after keyboard typing. Therefore, further investigations among female individuals are needed to understand the impact of keyboard typing across different age groups among female individuals.…”

Section: Discussionmentioning

confidence: 96%

Impact of keyboard typing on the morphological changes of the median nerve

Loh

Yeoh

Nakashima

et al. 2017

Journal of Occupational Health

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Objectives: The primary objective was to investigate the effects of continuous typing on median nerve changes at the carpal tunnel region at two different keyboard slopes (0° and 20°). The secondary objective was to investigate the differences in wrist kinematics and the changes in wrist anthropometric measurements when typing at the two different keyboard slopes. Methods: Fifteen healthy right-handed young men were recruited. A randomized sequence of the conditions (control, typing I, and typing II) was assigned to each participant. Wrist anthropometric measurements, wrist kinematics data collection and ultrasound examination to the median nerve was performed at designated time block. Results: Typing activity and time block do not cause significant changes to the wrist anthropometric measurements. The wrist measurements remained similar across all the time blocks in the three conditions. Subsequently, the wrist extensions and ulnar deviations were significantly higher in both the typing I and typing II conditions than in the control condition for both wrists (p<0.05). Additionally, the median nerve cross-sectional area (MNCSA) significantly increased in both the typing I and typing II conditions after the typing task than before the typing task. The MNCSA significantly decreased in the recovery phase after the typing task. Conclusions: This study demonstrated the immediate changes in the median nerve after continuous keyboard typing. Changes in the median nerve were greater during typing using a keyboard tilted at 20° than during typing using a keyboard tilted at 0°. The main findings suggest wrist posture near to neutral position caused lower changes of the median nerve.

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“…11 This can be explained by the fact that women have a lower size cuff 12 and lower carpal tunnel elasticity, which can contribute to lower compliance and accommodation of structures. 13,14 It is possible that women are predisposed to more rectified tunnels, which may also contribute to the development of CTS. 15 Based on these publications, our work is in agreement with the literature, with a high prevalence of CTS involvement in women.…”

Section: Discussionmentioning

confidence: 99%

Existe associação entre a eletroneuromiografia e a ultrassonografia no diagnóstico da Síndrome do Túnel do Carpo?

Filho

Elias

Salomão

et al. 2020

Rev Bras Ortop (Sao Paulo)

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Resumo Objetivo Verificar se existe associação entre os resultados da gravidade da eletroneuromiografia e a positividade da ultrassonografia no diagnóstico da síndrome do túnel do carpo. Métodos Sessenta e oito pacientes foram incluídos no estudo, sendo 61 mulheres e 7 homens, com média de idade de 54,4 anos. Os resultados da ultrassonografia (positivo ou negativo) foram cruzados com os resultados da eletroneuromiografia (leve, moderado ou grave) e verificada a existência de associação. Resultados Cento e trinta e seis mãos com suspeita ou sintomas de síndrome do túnel do carpo foram avaliadas. O diagnóstico ultrassonográfico positivo foi observado em 72 mãos e negativo em 64; 123 mãos apresentaram eletroneuromiografia positiva para síndrome do túnel do carpo e 13 apresentaram resultado negativo. O grau grave da eletroneuromiografia foi prevalente. Conclusão Houve associação estatisticamente significativa entre eletroneuromiografia e ultrassonografia (p < 0,05), sendo que a positividade da ultrassonografia foi maior para níveis mais graves de síndrome do túnel do carpo dados pela eletroneuromiografia.

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Gender differences in carpal tunnel relative cross-sectional area: a possible causative factor in idiopathic carpal tunnel syndrome

Abstract: V.

Cited by 36 publications

References 13 publications

Sex-related differences in carpal arch morphology

Sex-related differences in carpal arch morphology

Impact of keyboard typing on the morphological changes of the median nerve

Existe associação entre a eletroneuromiografia e a ultrassonografia no diagnóstico da Síndrome do Túnel do Carpo?

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