Optimal Ultrasonographic Measurements for Diagnosing Carpal Tunnel Syndrome in Patients With Diabetic Sensorimotor Polyneuropathy: A Case-Control Study

Overview

Journal Ann Rehabil Med

Specialty Rehabilitation Medicine

Date 2019 Mar 12

PMID 30852870

Citations 1

Authors

Ji Woong Park

Seokmin Lee

Rhee Wook Jang

Sungche Lee

Sanghoon Lee

Hyunchul Cho

Yoon-Hee Choi

Jinmyoung Kwak

Affiliations

Soon will be listed here.

Abstract

Objective: To investigate the optimal sonographic method for diagnosing carpal tunnel syndrome (CTS) in patients with diabetic sensorimotor polyneuropathy (DSP).

Methods: A total of 190 participants were divided into four groups based on DSP history and electrodiagnostic results of CTS. The absolute parameters were measured at baseline and the relative values were calculated: maximal cross-sectional area (CSA) of the median nerve throughout the carpal tunnel (Mmax), median nerve CSA at the forearm level (Mf), ulnar nerve CSA at the pisiform level (Upi), difference between Mmax and Mf (∆MM), and difference between Mmax and Upi (∆MU). Then, the optimal ultrasonographic parameters for diagnosing CTS, according to the presence of DSP, using absolute and relative cutoff values were analyzed.

Results: Median and ulnar nerve CSAs were significantly larger in the DSP group than in the control group. In the DSP participants, the mean Mmax, ∆MM, and ∆MU values were significantly larger in patients with both DSP and CTS than in patients with DSP only. The Mmax thresholds of 9.5 mm2 in the control group and 11.5 mm2 in the DSP group showed the greatest sensitivity and specificity for diagnosing CTS. The ∆MM thresholds of 2.5 mm2 and ∆MU thresholds of 4.5 mm2 had the greatest sensitivity and specificity in both the DSP and control groups.

Conclusion: Measurement of Mmax, ∆MM and ∆MU is an optimal ultrasonographic evaluation method for diagnosing CTS in patients with DSP.

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