USG-guided Hydrodissection for Recurrent Ulnar Neuropathy in a Patient with Anteriorly Transposed Nerve

Imaging of peripheral nerves by ultrasound has come into vogue with availability of higher frequency linear transducers and variable sizes of footprints allowing better spatial resolution. Hydrodissection is a novel technique which was elaborated in the literature, not long ago, in 2008. This case report elaborates hydrodissection done for a patient with recurrent symptoms of ulnar neuropathy 4 years after anterior transposition of the nerve. Ultrasound-guided perineural injections of saline and steroid were given 2 months apart and the patient was followed up for 6 months thereafter. Ultrasound-guided hydrodissection technique has gained significant attention in the recent times but it still lacks large studies or trials to validate its safety, establish guidelines on techniques and solutions, thus necessitating exploration in this field.