Related Experiment Video
Updated: May 26, 2026

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
Published on: October 7, 2021
Sural-to-radial amplitude ratio in the diagnosis of diabetic sensorimotor polyneuropathy
Carolina Barnett1, Bruce A Perkins, Mylan Ngo
1Division of Neurology, Department of Medicine, University Health Network, 5EC-309, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario M5G 2C4, Canada.
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.
Related Concept Videos
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
Pulse Assessment Sites
Diabetic Foot Ulcer
