Diagnostic accuracy of three sensory tests for diagnosis of sensory disturbances.

Abstract:

BACKGROUND:Clinical diagnosis of sensory disturbances is extremely challenging, partly because the utility of sensory tests is questionable. Transection of C7 nerve root provides an objective assessment model to determine the diagnostic accuracy of sensory tests. The purpose of this study was to investigate the diagnostic accuracy of Semmes-Weinstein Monofilaments (SWM; Sammons Preston, Bolingbrook, IL), static two-point discrimination (s2PD), and current perception threshold (CPT) tests in patients with contralateral C7 nerve root transfer. METHODS:The contralateral index finger of patients was tested preoperatively and 6 weeks postoperatively, including the Revised Short-Form McGill Pain Questionnaire (SF-MPQ-2), SWM, s2PD, and CPT tests. The SF-MPQ-2 was used as a gold standard for sensory disturbances. RESULTS:A total of 38 patients were included in the study. The likelihood probability ratio of SWM and CPT tests generated small shifts in probability, whereas the s2PD test did not show any capacity to detect sensory disturbances. The areas under the curves (AUC) for SWM and CPT tests were 0.724 and 0.697, respectively. Based on different positive test standards, the AUCs for s2PD (≥ 6 mm) and s2PD (≥ 7 mm) tests were 0.632 and 0.658, respectively. When CPT and SWM tests were combined as a measure, the AUC increased to 0.763. CONCLUSION:The SWM and CPT tests show a small capacity to detect sensory disturbances, whereas the s2PD test does not show any diagnostic capacity. To better understand sensory disturbances, a comprehensive testing protocol including valid measures of physical impairment and symptom-specific measurement tools should be adopted.

journal_name

J Reconstr Microsurg

authors

Li XM,Yang Y,Hou Y,Yang JT,Qin BG,Fu G,Gu LQ

doi

10.1055/s-0034-1384819

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

67-73

issue

1

eissn

0743-684X

issn

1098-8947

journal_volume

31

pub_type

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