AB1120 DIAGNOSTIC ROLE OF NEUROMUSCULAR ULTRASOUND IN CUBITAL TUNNEL SYNDROME

Abstract

Background Cubital tunnel syndrome (CuTS) is the second most common compressive neuropathy of the upper limb following carpal tunnel syndrome and is the most common site for entrapment for the ulnar nerve Objectives Our aim is to evaluate the role of ultrasonography (US) as a diagnostic tool for Cubital tunnel syndrome (CuTS) in comparison with nerve conduction study (NCS). Methods: twenty elbows with CuTS and twenty asymptomatic controls were assessed by NCS and underwent ultrasonography of elbows. Data from patients and controls were compared to determine the diagnostic relations in patients with CuTS and the grade of severity Results There was a high degree of correlation between NCS of the ulnar nerve, clinical parameters and variable US measurements. The CSA of the ulnar nerve was the most sensitive parameter and a cut-off point of 9.5 mm2 behind medial epicondyle was found to be 100% sensitive and 80% specific. The ulnar nerve ratios (UNR) had a diagnostic accuracy of 95% with 85% specificity. Conclusion Ultrasonographic measurements of the ulnar nerve CSA and UNR have a comparable diagnostic value as a non-invasive and an alternative modality for the evaluation of CuTS References [1] Simon N, Ralph J, Poncelet A, Engstrom J, Chin C, Kliot M. A comparison of ultrasonographic and electrophysiologic inchingin ulnar neuropathy at the elbow. Clin Neurophysiol. 2015;126(2):391-398. [2] Omejec G, Podnar S. Normative values for short-segment nerve conduction studies and ultrasonography of the ulnar nerve at the elbow. Muscle nerve. 2015;51(3):370-377. [3] Yoon J, Walker F, Cartwright M. Ultrasonographic swelling ratio in the diagnosis of ulnar neuropathy at the elbow. Muscle nerve. 2008;38(4):1231-1235. [4] Bayrak A, Bayrak I, Turker H, Elmali M, Nural M. Ultrasonography in patients with ulnar neuropathy at the elbow: Comparison of cross-sectional area and swelling ratio with electrophysiological severity. Muscle nerve. 2010;41(5):661-666. Disclosure of Interests None declared