Özet:

Background: The diagnostic value of B-mode and Doppler ultrasonography of the wrist in the diagnosis of carpal tunnel syndrome (CTS) in patients with diabetic polyneuropathy (DPN) was aimed to investigate. Materials and Methods: 21 patients, who were diagnosed DPN with clinical examination and electrophysiological study, were divided into two groups: CTS group (20 hands) and control group (22 hands). The median nerve crosssectional area (MSA) and flattening ratio of the median nerve were measured at the level of carpal tunnel entrance [proximal (p)] and the wrist crease [distal (d)]. In color Doppler ultrasound examination, radial and ulnar arteries were evaluated with high resolution 12 MHz transducer (Logic 7) while both hands were in neutral position.  Results: In comparison between groups, in the CTS group MSE values, measured at the proximal and distal levels, were significantly higher than control group (respectively, p=0.006, p=0.002). In comparison between groups, both radial and ulnar artery flow characteristics did not differ (p>0.05). With the ROC curve analysis, the threshold value in the diagnosis of CTS was found as MSA-p ≥ 12.5 mm2 (area under the ROC curve (AUC) 0.73; sensitivity 60% and specificity 78%) and MSA-d ≥ 13.5 mm2 (AUC 0.75; sensitivity 65% and specificity 87%). Conclusions: Wrist ultrasonography may be a diagnostic modality in patients with diabetic polyneuropathy when it is suspected concurrent CTS. 

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