Modified Camitz opponensplasty for treatment of severe carpal tunnel syndrome

Poy-Gual, Corona; Puente-Alonso, C.; Cano-Rodriguez, Gisele

doi:10.1177/1753193418787666

Cited by 4 publications

(1 citation statement)

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“…We believe that measuring thumb pronation angle using a gyroscope has many advantages. Kapandji scores [ 44 ] are widely used to evaluate thumb opposition in clinical practice [ 20 , 45 – 52 ]. However, it is not an accurate quantitative evaluation method but only a numerical categorized method; moreover, there were reports that almost all healthy subject and even CTS patients with thenar atrophy were able to obtain 9 or 10 points of this score [ 22 , 53 ].…”

Section: Discussionmentioning

confidence: 99%

A new method of measuring the thumb pronation and palmar abduction angles during opposition movement using a three-axis gyroscope

et al. 2018

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BackgroundThumb opposition is vital for hand function and involves pronation and palmar abduction. The improvement of pronation is often used as one of the evaluation items of the opponensplasty method for severe carpal tunnel syndrome. However, most of the studies used substitution evaluation methods for measurement of the pronation angle. Thus, there is still no appropriate method for measuring thumb pronation angle accurately in carpal tunnel syndrome patients.In recent reports, a wearable gyroscope was used to evaluate upper extremity motions and it can be possibly used for accurate measurement of the thumb pronation angle along the three-dimensionally moving bone axis.Thus, we investigated the reliability of measuring thumb pronation using a gyroscope and evaluated whether this method can be used to detect opposition impairment.MethodsThe participants were volunteers with unaffected upper limbs (32 hands) and patients with carpal tunnel syndrome (27 hands). The pronation and palmar abduction angles during opposition movements were measured using a three-axis gyroscope that included a three-axis accelerometer. The gyroscope was fixed onto the first metacarpal bone and the thumb phalanx.ResultsThe pronation and palmar abduction angles of the metacarpal bone and the palmar abduction angles of the phalanx significantly decreased in the carpal tunnel syndrome group. The pronation angle of the metacarpal bone during opposition movement peaked later than the palmar abduction angle in all hands.ConclusionsWe were able to measure the thumb pronation and palmar abduction angles using the three-axis gyroscope, and this tool was able to detect impairments of thumb opposition due to carpal tunnel syndrome. This could be a tool for measuring thumb and finger angles and for detecting impairments caused by various diseases.

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