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  • Title: Double-Shock Stimulation of the Superficial Radial Nerve Compared With Standard Medial Plantar Nerve Conduction in the Early Detection of Asymptomatic Diabetic Neuropathy: A Pilot Study.
    Author: Thabit MN, Sedky A, Sayed MA, Baddary HM, Mohamed M.
    Journal: J Clin Neurophysiol; 2018 Nov; 35(6):474-480. PubMed ID: 30247382.
    Abstract:
    PURPOSE: Diabetes mellitus is a major public health problem. Diabetic polyneuropathy (DP) is one of the most common complications of diabetes mellitus. The early detection of DP is very important for timely treatment of symptoms and preventative foot care. METHODS: Participants were sorted into 3 age- and sex-matched groups: 20 "healthy" individuals; 21 diabetic patients without DP symptoms, "asymptomatic"; and 24 diabetic patients suffering from symptoms consistent with DP, "symptomatic." All study participants had normal results on conventional nerve conduction studies. All groups underwent both medial plantar mixed nerve conduction (as a single-shock stimulation technique) and superficial radial nerve conduction (double-shock stimulation) measurements. Interstimulus intervals of 2 to 8 ms were used to record sensory nerve action potentials (SNAP) 1 and SNAP 2 for both stimuli. RESULTS: We found statistically significant decreases in medial plantar NAPs' amplitude and conduction velocity, and SNAP1/SNAP2 ratios between the three groups, especially at smaller interstimulus intervals. CONCLUSIONS: Both medial plantar mixed nerve conduction and double-shock superficial radial nerve stimulation are reliable methods for the early detection of asymptomatic DP. However, the medial plantar mixed nerve technique is easier and less time-consuming.
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