Outcomes of Mini-Open Carpal Tunnel Release in Patients With Unrecordable Preoperative Nerve Conduction Potentials at a Minimum of 5 Years

Background: The aim of this study is to assess the outcomes of carpal tunnel release (CTR) in a cohort of patients with preoperatively unrecordable median nerve sensory and motor potentials in comparison with historical controls at minimum 5-year follow-up. Methods: We retrospectively identified 1297 patients who underwent CTR at a tertiary care referral center from July 2008 to June 2013. After exclusion criteria and review of available preoperative nerve conduction studies, 24 patients who underwent CTR with preoperative unrecordable sensory and motor nerve potentials were identified. Fifteen living, mentally capable patients were contacted by telephone for follow-up. Our primary outcome measure was the Boston Carpal Tunnel Syndrome Questionnaire (BCTQ). Secondary outcome measures included Disabilities of the Arm, Shoulder, and Hand (DASH) score, pain on a 0 to 10 Likert scale, and satisfaction on a 0 to 10 Likert scale. Results: Our response rate was 80% (12 out of 15) of eligible patients. Mean follow-up was 6.9 years in our study (range, 5.4-9.5 years). The mean BCTQ symptom score was 1.4, and the mean BCTQ functional score was 1.8. Mean DASH score was 15.2. On average, patient-reported pain was 0.3 and satisfaction was 8.3. No difference was found in outcomes of CTR in patients with end-stage carpal tunnel syndrome compared with historical means. Conclusions: Patients with end-stage carpal tunnel syndrome do not have worse long-term patient-reported outcomes after CTR compared with the general population. Unrecordable nerve potentials are not a contraindication for CTR.