Semi-quantitative electromyography as a predictor of nerve transfer outcome |
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| Affiliation: | 1. Institute of Nerve and Brachial Plexus Surgery, 92 Boulevard de Courcelles, 75017 Paris, France;2. Service d''orthopédie, de traumatologie, de chirurgie plastique, reconstructrice et assistance main, CHU de Besançon, Boulevard Fleming, 25030 Besançon, France |
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| Abstract: | ObjectivesEvaluate correlation between donor nerve semi-quantitative electromyography (sqEMG) and strength outcome in nerve transfer surgery.MethodsRetrospective review of pre-operative donor nerve semi-quantitative neurophysiology and post-operative recipient muscle force after at least one-year follow-up. The semi-quantitative technique is the average motor unit number estimate associated with needle recorded interference patterns in the donor muscle (IP-AMUNE), which was correlated with hand-held manometry, standardized as a percent of the contralateral arm, using multivariable linear regression with backward selection.ResultsTwenty-eight nerve transfer cases were included. The correlation between the donor nerve IP-AMUNE and the recipient muscle strength was moderate to strong and highly significant (r = 0.67, p < 0.001). Medical Research Council (MRC) grading did not predict strength (p > 0.54).ConclusionsIP-AMUNE is a good predictor of strength after nerve transfer surgery and should be considered in the evaluation and planning of patients undergoing nerve transfer to aid in donor nerve selection.SignificanceIP-AMUNE may significantly benefit those undergoing nerve transfer surgery for the restoration of movement. |
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| Keywords: | Neurophysiology Nerve transfer Electromyography Spinal cord injury Reconstructive neurosurgery Quantitative neurophysiology BPI" },{" #name" :" keyword" ," $" :{" id" :" k0040" }," $$" :[{" #name" :" text" ," _" :" Brachial Plexus Injury CNE" },{" #name" :" keyword" ," $" :{" id" :" k0050" }," $$" :[{" #name" :" text" ," _" :" Concentric Needle Electrode EIM" },{" #name" :" keyword" ," $" :{" id" :" k0060" }," $$" :[{" #name" :" text" ," _" :" Electrical Impedance Myography EMG" },{" #name" :" keyword" ," $" :{" id" :" k0070" }," $$" :[{" #name" :" text" ," _" :" Electromyography IP" },{" #name" :" keyword" ," $" :{" id" :" k0080" }," $$" :[{" #name" :" text" ," _" :" Interference Pattern IP-AMUNE" },{" #name" :" keyword" ," $" :{" id" :" k0090" }," $$" :[{" #name" :" text" ," _" :" Interference pattern – average motor unit number estimate LMN" },{" #name" :" keyword" ," $" :{" id" :" k0100" }," $$" :[{" #name" :" text" ," _" :" Lower Motor Neuron MRC" },{" #name" :" keyword" ," $" :{" id" :" k0110" }," $$" :[{" #name" :" text" ," _" :" Medical Research Council MU" },{" #name" :" keyword" ," $" :{" id" :" k0120" }," $$" :[{" #name" :" text" ," _" :" Motor Unit MUNE" },{" #name" :" keyword" ," $" :{" id" :" k0130" }," $$" :[{" #name" :" text" ," _" :" Motor Unit Number Estimate PNI" },{" #name" :" keyword" ," $" :{" id" :" k0140" }," $$" :[{" #name" :" text" ," _" :" Peripheral Nerve Injury qEMG" },{" #name" :" keyword" ," $" :{" id" :" k0150" }," $$" :[{" #name" :" text" ," _" :" Quantitative Electromyography QOL" },{" #name" :" keyword" ," $" :{" id" :" k0160" }," $$" :[{" #name" :" text" ," _" :" Quality of Life SCI" },{" #name" :" keyword" ," $" :{" id" :" k0170" }," $$" :[{" #name" :" text" ," _" :" Spinal Cord Injury SD" },{" #name" :" keyword" ," $" :{" id" :" k0180" }," $$" :[{" #name" :" text" ," _" :" Standard Deviation UMN" },{" #name" :" keyword" ," $" :{" id" :" k0190" }," $$" :[{" #name" :" text" ," _" :" Upper Motor Neuron |
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