Muscle & nerve · 2017
New strategy for improving the diagnostic sensitivity of repetitive nerve stimulation in myasthenia gravis.
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Bou Ali Hanna, Salort-Campana Emmanuelle, Grapperon Aude Marie, Gallard Julien, Franques Jerome, Sevy Amandine, Delmont Emilien, Verschueren Annie, Pouget Jean, Attarian Shahram
Аннотация
INTRODUCTION: The diagnostic sensitivity of repetitive nerve stimulation (RNS) in patients with myasthenia gravis (MG) varies as a function of the number of muscles or the choice of muscles studied.
METHODS: By exploring 12 muscles bilaterally, we evaluated the global sensitivity of RNS at rest, the sensitivity in different clinical forms, and the sensitivity of different combinations of muscles studied.
RESULTS: The global sensitivity of RNS was 82%, and specificity was 100%. The sensitivity in the MG subgroups was as follows: ocular (O) = 67%; oculobulbar (OB) = 86%; and generalized (G) = 89%. The most sensitive muscles were the anconeus in group O, orbicularis oculi (OO) or nasalis in group OB, and the trapezius in group G. Maximum sensitivity was obtained by exploring OO, trapezius, and anconeus bilaterally.
CONCLUSIONS: We recommend bilateral exploration of at least 3 muscles, a facial muscle, trapezius, and anconeus. Muscle Nerve 55: 532-538, 2017.
METHODS: By exploring 12 muscles bilaterally, we evaluated the global sensitivity of RNS at rest, the sensitivity in different clinical forms, and the sensitivity of different combinations of muscles studied.
RESULTS: The global sensitivity of RNS was 82%, and specificity was 100%. The sensitivity in the MG subgroups was as follows: ocular (O) = 67%; oculobulbar (OB) = 86%; and generalized (G) = 89%. The most sensitive muscles were the anconeus in group O, orbicularis oculi (OO) or nasalis in group OB, and the trapezius in group G. Maximum sensitivity was obtained by exploring OO, trapezius, and anconeus bilaterally.
CONCLUSIONS: We recommend bilateral exploration of at least 3 muscles, a facial muscle, trapezius, and anconeus. Muscle Nerve 55: 532-538, 2017.
Предметные рубрики MeSH
AdolescentAdultAgedAged, 80 and overAutoantibodiesElectric StimulationElectromyographyFatty Acids, MonounsaturatedFemaleHumansMaleMiddle AgedMuscle, SkeletalMyasthenia GravisNeurologic ExaminationReceptors, CholinergicRetrospective StudiesSensitivity and SpecificitySeverity of Illness IndexYoung Adult