IN-RATIO: a new test to increase diagnostic sensitivity in ulnar nerve entrapment at elbow

Pietro Caliandro, Mariangela Foschini, Costanza Pazzaglia, Giuseppe La Torre, Irene Giovanna Aprile, Giuseppe Granata, Pietro Attilio Tonali, Luca Padua

Risultato della ricerca: Contributo in rivistaArticolo in rivista

17 Citazioni (SciVal)

Abstract

OBJECTIVE: Motor conduction velocity may yield false-negative results in mild ulnar nerve entrapment at elbow (UNE). There is evidence that the clinical heterogeneity of UNE may be due to the different involvement of fascicles. We hypothesized that, if fibres to FDI are more damaged than fibres to ADM, a relative slowing of motor conduction velocity (CV) at the segment across the elbow recording from FDI (FDI-CV) versus CV at the same segment recording from ADM (ADM-CV) would occur. METHODS: We calculated the ratio between FDI-CV and ADM-CV (IN-RATIO) in 60 consecutive UNE patients, 40 norms, and 16 patients with lower cervical radiculopathy. The UNE sample consisted of (1) patients with neurophysiological evidence (UNE NF+), (2) patients without neurophysiological evidence (UNE NF-). We evaluated the possible usefulness of the IN-RATIO to increase sensitivity in diagnosing UNE. RESULTS: The IN-RATIO was lower in the UNE NF- than in norms (p<0.001) and cervicobrachialgia sample (p=0.02). We found that if the IN-RATIO is
Lingua originaleEnglish
pagine (da-a)1600-1606
Numero di pagine7
RivistaClinical Neurophysiology
Volume119
Stato di pubblicazionePubblicato - 2016

Keywords

  • Diagnosis
  • Entrapment of ulnar nerve
  • Neurography

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