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KMID : 0361420080320020189
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Journal of Korean Academy of Rehabilitation Medicine
2008 Volume.32 No. 2 p.189 ~ p.193
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Ultrasonographic Findings of Carpal Tunnel after Local Steroid Injection in Carpal Tunnel Syndrome
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Kim Ji-Yeon
Seo Jeong-Hwan
Sim Young-Joo
Kim Seong-Kyun
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Abstract
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Objective: To evaluate ultrasonographic change of median nerve and flexor tendon in carpal tunnel after local steroid injection in carpal tunnel syndrome (CTS).
Methods: Thirteen patients (24 hands) with CTS diagnosed clinically and electrophysiologically were included. All subjects were examined by ultrasonography with high-resolution linear array transducer and injected with 40 mg of triamcinolone acetonide. The ultrasonography was evaluated with regard to cross-sectional area and the flattening ratio of the median nerve and cross-sectional area of the flexor pollicis longus tenon at pisiform and hamate bone. After 4 weeks, the patients were re-evaluated with electrophysiologic study and ultrasonography.
Results: Most patients (11/13) showed improvement of clinical symptoms and electrophysiologic parameters after the local steroid injection. The cross-sectional area of median nerve at pisiform using ultrasonography significantly decreased after the local steroid injection. However, flexor pollicis longus tendon did not show significant change after the injection.
Conclusion: Local steroid injection in the patients with CTS caused improvement in ultrasonographic findings of median nerve.
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KEYWORD
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Ultrasonography, Carpal tunnel syndrome, Steroid injection
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