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Sural-to-radial amplitude ratio in the diagnosis of diabetic sensorimotor polyneuropathy

Authors

  • Carolina Barnett MD,

    1. Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada
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  • Bruce A. Perkins MD, MPH,

    1. Division of Endocrinology and Metabolism, Department of Medicine, University Health Network, Toronto General Hospital, Toronto, Ontario, Canada
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  • Mylan Ngo RT,

    1. Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada
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  • Slavko Todorov RT,

    1. Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada
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  • Rita Leung RT,

    1. Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada
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  • Vera Bril MD, FRCP

    Corresponding author
    1. Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada
    • Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada
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Abstract

In this investigation we measured sural and radial sensory potentials and the sural/radial amplitude ratio (SRAR) in 49 patients with diabetes and diabetic sensorimotor polyneuropathy (DSP) according to consensus criteria. Forty-five (92%) of the patients had a Toronto Clinical Neuropathy Score (TCNS) ≤5, which is consistent with a diagnosis of DSP. Using a threshold for SRAR of <0.21, we found no advantage of using the SRAR over the sural nerve potential amplitude alone in sensitivity for identification of DSP. Muscle Nerve 45: 126–, 2012

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