Purpose: Compression of the sensory branch of the radial nerve (SBRN) in the proximal forearm is an uncommon condition, leading to both motor and sensory deficits. The aim of this study is to assess the surgical outcomes of SBRN release at the level of the brachioradialis arcade.
Methods: A retrospective study of prospectively collected data was conducted on patients undergoing brachioradialis release (BRR) from March 2014 to March 2021. The measured outcomes included quick-DASH (Disability of the Arm Shoulder Hand questionnaire), work-DASH, visual analog scale (VAS) scores for pain, and patient satisfaction with surgery, at a minimum six month follow-up.
Results: A total of twenty patients (mean age of 44.1 (range 25-62) were included in this study, of which nine (45%) were males. Eleven patients (55%) underwent isolated BRR, while the other nine patients (45%) underwent concomitant BRR and lacertus release. The three most common presenting symptoms in patients with isolated BRS were radiovolar forearm pain (100%), disturbed sensation in the SBRN territory (85%), and hand/thumb fatigue (75%). Forearm pain and fatigue were found in all patients with combined BRS and lacertus syndrome. The response rate for the functional outcome scores was 65% (13/20). Quick-DASH significantly improved (preoperative 29.6 (range 13.6-57.5) to postoperative 6.9 (range 0-27.27), p < 0.0001) as did the work DASH (p < 0.0001). Follow-up VAS Pain was 1 and satisfaction with surgery 9.6.
Conclusion: BRS is an uncommon radial nerve compression syndrome in the proximal forearm that differs from the more commonly recognized radial tunnel syndrome. It presents with radio-volar forearm pain, disturbed sensation in the SBRN distribution, and loss of hand/thumb endurance. Minimally invasive BRR immediately restores wrist extension strength, significantly improves DASH scores, and yields positive outcomes at a minimum six-month follow-up.
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