S136. High resolution ultrasound of fascicles in the ulnar nerve: A pilot study

Abstract

Introduction In the last few years, the use of ultrasound to diagnose small parts, different musculoskeletal structures and peripheral nerves is rapidly increasing, aiming to be used as a future diagnostic imaging tool for help in diagnosing different types of peripheral neuropathies, together with focal and diffuse nerve pathologies. The cross sectional area of the peripheral nerves have been extensively studied by different nerve sonography labs, however, only few studies considered sonographic imaging of the nerve fascicles. The objective of this work is to study the nerve fascicles of the ulnar nerve by high resolution ultrasound. Methods 27 healthy adult volunteers were recruited after signing an informed consent. The ulnar nerve fascicles were studied by an 18 MHZ probe, at the Guyon’s canal and at the mid forearm bilaterally. The number of ulnar nerve fascicles was counted together with the CSA. Results The mean fascicular number of the ulnar nerve was estimated at two sites (Guyon’s canal and the mid forearm). Significant positive statistical correlation was found between ulnar nerve fascicular number and the following parameters: weight, BMI, and age. No significant statistical correlation was noted in relation to height. Conclusion The results obtained in study this could be used in the diagnosis of inherited peripheral nerve disorders, especially those involving enlargement of single nerve fascicles, like Charcot Marie tooth.