Quantitative evaluation of median nerve motor function in carpal tunnel syndrome using load cell: Correlation with clinical, electrodiagnostic, and ultrasonographic findings

Dong Hwan Kim, Sung Bae Park, Sang Hyung Lee, Young Je Son, Gih Sung Chung, Hee Jin Yang

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1 Citation (Scopus)

Abstract

Objective: Major complaints of carpal tunnel syndrome (CTS) are sensory components. However, motor deficit also impedes functional status of hand. Contrary to evaluation of sensory function, the objective, quantitative evaluation of median nerve motor function is not easy. The motor function of median was evaluated quantitatively using load cell and its correlation with findings of electrodiagnostic study (EDS) was evaluated. Methods: Objective motor function of median nerve was evaluated by load cell and personal computer-based measurement system. All of the measurement was done in patients diagnosed as having idiopathic CTS by clinical features and EDS findings. The strength of thumb abduction and index finger flexion was measured in each hand three times, and the average value was used to calculate thumb index ratio (TIR). The correlation of TIR with clinical, EDS, and ultrasonographic findings were evaluated. Results: The TIR was evaluated in 67 patients (119 hands). There were 14 males and 53 females, mean age were 57.6 years (range 28 to 81). The higher preoperative nerve conductive studies grade of the patients, the lower TIR was observed [p<0.001, analysis of variance (ANOVA)]. TIR of cases with thenar atrophy were significantly lower than those without (p<0.001, t-test). TIR were significantly lower in patients with severe median nerve swelling in ultrasonography (p=0.042, ANOVA). Conclusion: Measurements of median nerve motor function using load cell is a valuable evaluation tool in CTS. It might be helpful in detecting subclinical motor dysfunction before muscle atrophy develops.

Original languageEnglish
Pages (from-to)232-235
Number of pages4
JournalJournal of Korean Neurosurgical Society
Volume54
Issue number3
DOIs
StatePublished - 1 Sep 2013

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Carpal Tunnel Syndrome
Median Nerve
Thumb
Hand
Analysis of Variance
Muscular Atrophy
Microcomputers
Fingers
Atrophy
Ultrasonography

Keywords

  • Carpal tunnel syndrome
  • Electrodiagnostic study
  • Load cell
  • Thumb abduction strength
  • Ultrasonography

Cite this

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title = "Quantitative evaluation of median nerve motor function in carpal tunnel syndrome using load cell: Correlation with clinical, electrodiagnostic, and ultrasonographic findings",
abstract = "Objective: Major complaints of carpal tunnel syndrome (CTS) are sensory components. However, motor deficit also impedes functional status of hand. Contrary to evaluation of sensory function, the objective, quantitative evaluation of median nerve motor function is not easy. The motor function of median was evaluated quantitatively using load cell and its correlation with findings of electrodiagnostic study (EDS) was evaluated. Methods: Objective motor function of median nerve was evaluated by load cell and personal computer-based measurement system. All of the measurement was done in patients diagnosed as having idiopathic CTS by clinical features and EDS findings. The strength of thumb abduction and index finger flexion was measured in each hand three times, and the average value was used to calculate thumb index ratio (TIR). The correlation of TIR with clinical, EDS, and ultrasonographic findings were evaluated. Results: The TIR was evaluated in 67 patients (119 hands). There were 14 males and 53 females, mean age were 57.6 years (range 28 to 81). The higher preoperative nerve conductive studies grade of the patients, the lower TIR was observed [p<0.001, analysis of variance (ANOVA)]. TIR of cases with thenar atrophy were significantly lower than those without (p<0.001, t-test). TIR were significantly lower in patients with severe median nerve swelling in ultrasonography (p=0.042, ANOVA). Conclusion: Measurements of median nerve motor function using load cell is a valuable evaluation tool in CTS. It might be helpful in detecting subclinical motor dysfunction before muscle atrophy develops.",
keywords = "Carpal tunnel syndrome, Electrodiagnostic study, Load cell, Thumb abduction strength, Ultrasonography",
author = "Kim, {Dong Hwan} and Park, {Sung Bae} and Lee, {Sang Hyung} and Son, {Young Je} and Chung, {Gih Sung} and Yang, {Hee Jin}",
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AU - Son, Young Je

AU - Chung, Gih Sung

AU - Yang, Hee Jin

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