Rates of Complications and Secondary Surgeries of Mini-Open Carpal Tunnel Release.

The purpose of this study was to determine the rates and types of complications and secondary surgeries after mini-open carpal tunnel release. A retrospective cohort study was performed for 1,328 patients who underwent mini-open carpal tunnel release from August 2008 to July 2013. Patients were excluded for acute trauma, the index procedure being revision surgery, neoplasm, age less than 18 years, incomplete records, and postoperative follow-up less than 1 month, which yielded 904 patients who underwent 1,144 surgeries. Of 1,144 carpal tunnel releases performed, 14 (1.2%) were noted to have a complication at final follow-up, with no cases of major nerve or vessel injury. Fourteen patients (1.2%) underwent secondary surgery, including 11 cases for persistent or recurrent carpal tunnel syndrome and 3 cases for infection or hematoma. Chronic kidney disease was associated with an increased risk of complication. Diabetes mellitus, chronic kidney disease, and cervical radiculopathy were associated with an increased risk of secondary surgery. The short-term complication and secondary surgery rates of mini-open carpal tunnel release are low. Patients with diabetes mellitus, chronic kidney disease, and cervical radiculopathy should be counseled regarding risks of complication and secondary surgery.