Abstract
AbstractObjectivesCarpal tunnel syndrome (CTS) is currently investigated with nerve conduction studies (NCS) for diagnosis, but these are expensive and invasive. We propose that ultrasound (US) will be comparable to NCS in diagnosing CTS.MethodThere were two groups in this study – a control (60 wrists) and symptomatic group (56 wrists), who all underwent a clinical examination. US measurements of the median nerve were the cross-sectional area of the carpal tunnel at the level of pisiform (CSAc), pronator quadratus (CSAp), 12 cm proximally in the mid-forearm (CSAmf) and palmar bowing of the flexor retinaculum. The main calculation was the CSA difference (CSAd = CSAc − CSAp).ResultsIn the symptomatic group, NCS diagnosed 32/56 cases (sensitivity 57%). In the control group, the mean CSAc was 8.36 mm2, CSAd of 0.57 mm2, and palmar bowing 1.18 mm. The symptomatic group mean CSAc was 13.73 mm2, CSAd of 5.02 mm2, and palmar bowing 4.02 mm. With a threshold value of 10 mm2 for the CSAc, 48/56 cases were diagnosed...
Published Version
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