Effect of Carpal Tunnel Syndrome on the Ulnar Nerve at the Wrist

Kang, Seok; Yang, Seung Nam; Yoon, Joon Shik; Kang, Hyo Jeong; Won, Sun Jae

doi:10.7863/ultra.15.02064

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…We also found a correlation between the sensory recordings on the ulnar nerve on the ring finger and CTS aggravation, disability, and risk factors, which supports other studies evidencing common moderate involvement of the ulnar nerve in the clinical presentations of CTS ( 132 , 133 , 134 , 135 , 136 , 137 , 138 ) or that computer work is associated with the ulnar nerve entrapment at the elbow (cubital tunnel syndrome) and the wrist (Guyon's canal syndrome) due to repetitive compression from leaning on the elbows or wrists during work with a mouse or a keyboard ( 139 , 140 , 141 ).…”

Section: Discussionsupporting

confidence: 89%

Occupational and non-occupational risk factors correlating with the severity of clinical manifestations of carpal tunnel syndrome and related work disability among workers who work with a computer

Çupi,

Šarac,

Jovanović

et al. 2023

Archives of Industrial Hygiene and Toxicology

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The contribution of certain occupational and personal factors to the development of carpal tunnel syndrome (CTS) is still uncertain. We investigated which specific occupational and non-occupational factors correlate with the level of clinical manifestations and work disability related to CTS. The study included 190 workers who work with a computer and have diagnosed CTS (100 men, 90 women, aged 20–65 years). Subjective experience of CTS-related impairments was assessed with the Symptom Severity Scale (SSS) and the Functional Status Scale (FSS) of the Boston Carpal Tunnel Syndrome Questionnaire (BCTQ). The objective, neural impairments were tested with electrodiagnostics (EDX), whereas CTS-related work disability data were collected from medical records. We found a high inter-correlation between BCTQ, EDX, and work disability data. These also showed high correlations with certain occupational factors (duration of computer-working in months and hours spent daily in computer-working, certain ergonomic, microclimatic, and other occupational conditions) and non-occupational factors (demographic and lifestyle factors: nutritional status, diet, smoking, alcohol consumption, and physical activity). Despite its limitations, our study has identified occupational and non-occupational risk factors that can aggravate CTS and work disability, but which can also be improved with workplace and lifestyle preventive and corrective measures. More research is needed, though, to establish the possible causal relationships and the independent influence of each of those risk factors.

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Section: Discussionsupporting

confidence: 89%

Occupational and non-occupational risk factors correlating with the severity of clinical manifestations of carpal tunnel syndrome and related work disability among workers who work with a computer

Çupi,

Šarac,

Jovanović

et al. 2023

Archives of Industrial Hygiene and Toxicology

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Section: Discussionmentioning

confidence: 99%

“…Some studies have shown that patients with CTS may have UN damage [ 16 , 17 ]. A study by Kang et al found that when patients with CTS underwent carpal tunnel release, the pressure in Guyon’s canal was reduced and the sensory conduction of the UN improved [ 16 ]. However, in several studies with larger patient populations, UN conduction was found to be unaffected in patients with CTS [ 18 – 20 ].…”

Section: Discussionmentioning

confidence: 99%

Ring finger sensory latency difference in the diagnosis and treatment of carpal tunnel syndrome

et al. 2021

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Objective To explore the sensitivity of median and ulnar nerve sensory latency differences in diagnosing carpal tunnel syndrome (CTS) at different severities. Methods CTS patients were divided into three groups based on disease severity (mild, moderate, and severe). Distal latency of sensory nerve action potential (SNAP) for the median and ulnar nerves was recorded. The sensitivity of SNAP distal latency to CTS and its correlation with CTS severity were analyzed. Results Significant differences were found in the median nerve sensory action potential distal latency (MSDL) and in the median and ulnar sensory latency difference to ring finger (MUD) but not in the ulnar nerve sensory action potential distal latency (USDL) between CTS and control. The sensitivity and specificity were 92.2 and 99.4% with an MSDL cutoff value of 2.40 ms, respectively, and were both 100% with a MUD cutoff value of 0.33 ms. There was no significant difference in USDL among the CTS and control groups. Significant differences were found in MSDL and MUD among the CTS severities and between mild and moderate CTS, but not between mild and severe CTS or between moderate and severe CTS. Correlations with CTS severity were observed for MSDL and MUD but not for USDL. Conclusion The ulnar nerve of the CTS patients was not damaged. A smaller MSDL reflected median nerve damage, which can be used for the early diagnosis of CTS. MUD correlated with CTS severity with a higher sensitivity than MSDL, which can provide therapeutic insight without pain to patients.

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“…For antenna arrays, the effect of mutual coupling can be evaluated straightforwardly thanks to the fact that each element can be fed separately. Techniques like mutual admittance matrix or incremental impedance are usually used to compensate the mutual coupling effects [9][10].…”

Section: Emperical Modelization Of Short Crlh Lwamentioning

confidence: 99%

Non-uniform description of short CRLH Leaky Wave Antenna with the Generalized Array Factor Approach

Rance

Lemaître-Auger

Siragusa

et al. 2014

2014 44th European Microwave Conference

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Radiation-patterns of short uniform CRLH LWA of various lengths have been computed. They show differences from the "array factor approach" predictions which cannot be explained by this model. Better results are achieved if we consider non uniform distributions of the leakage and propagation constants along the line. Non uniform distributions are determined by an empirical method based on the generalized array factor. The origin of this phenomenon is discussed and compared to the case of small array antennas.

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Effect of Carpal Tunnel Syndrome on the Ulnar Nerve at the Wrist

Abstract: The cross-sectional areas of the ulnar and median nerves at the wrist are increased in patients with carpal tunnel syndrome. Also, the cross-sectional area of the ulnar nerve is decreased after carpal tunnel release.

Cited by 10 publications

References 23 publications

Occupational and non-occupational risk factors correlating with the severity of clinical manifestations of carpal tunnel syndrome and related work disability among workers who work with a computer

Occupational and non-occupational risk factors correlating with the severity of clinical manifestations of carpal tunnel syndrome and related work disability among workers who work with a computer

Ring finger sensory latency difference in the diagnosis and treatment of carpal tunnel syndrome

Non-uniform description of short CRLH Leaky Wave Antenna with the Generalized Array Factor Approach

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