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  • Title: Median-radial sensory latencies comparison as a new test in carpal tunnel syndrome.
    Author: Ghavanini MR, Kazemi B, Jazayeri M, Khosrawi S.
    Journal: Electromyogr Clin Neurophysiol; 1996; 36(3):171-3. PubMed ID: 8737938.
    Abstract:
    Median and radial distal sensory latencies (DSL) were compared in 50 patients with carpal tunnel syndrome (CTS) and 50 healthy subjects by stimulating each nerve separately and recording sensory nerve action potential (SNAP) from standard anatomical locations for stimulation and recording sites. The range of difference between median DSL and radial DSL was 0.18 -1.18 msec in control group and 1.12-4.46 msec in CTS patients with a mean of 0.69 msec and 1.99 msec respectively (P < or = 0.0001). We found the value of 1 msec as a good cut-off point for diagnosis of CTS. The test described here seems to be an effective and simple criteria for increasing the sensitivity of nerve conduction studies in CTS.
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