Prospective Evaluation of Surgical and Anesthetic Technique of Carpal Tunnel Release in an Orthopedic Practice

Abstract

Purpose: The goal of this study was to determine whether the type of anesthesia (monitored anesthesia care [MAC] vs wide-awake local anesthesia no tourniquet technique [WALANT]) or the surgical technique (mini-open vs endoscopic) would affect patient satisfaction with postoperative pain control, postoperative pain, or opioid use after carpal tunnel release (CTR). The hypothesis was that endoscopic and open CTR surgery would have the same patient satisfaction with postoperative pain control, postoperative pain, and opioid use, but WALANT surgery would have higher patient satisfaction with postoperative pain control, postoperative pain, and opioid use than MAC.

Methods: This prospective study examined all patients undergoing carpal tunnel surgery by 4 hand surgeons at our institution. Two surgeons perform primarily 1-incision endoscopic CTR and the other 2 perform mini-open CTR. Two surgeons perform all procedures under WALANT; the other 2 employ MAC with a local anesthetic. Postsurgical questionnaires were completed at the 2-week postoperative visit. Patients reported remaining pills, average pain, highest pain, lowest pain, and overall satisfaction with postoperative pain control.

Results: A total of 93 patients underwent CTR by the 4 participating hand surgeons. Of these, 43 underwent open CTR and 50 underwent endoscopic CTR. Sixty-two were performed under MAC and 31 with WALANT. With regard to anesthesia type, overall there was 5.5 mean morphine equivalents (MME) less prescribed and an average of 3.6 MME more remaining on the first postoperative visit with WALANT compared with MAC. Patient satisfaction with postoperative pain control was an average score of 7.9 for MAC and 7.4 for WALANT. With regard to surgical technique, overall, there was 15.2 MME less prescribed and an average of 1.03 MME more remaining on the first postoperative visit with endoscopic CTR compared with open CTR. Patient satisfaction with postoperative pain control between endoscopic and open release demonstrated an average score of 7.1 and 8.0, respectively.

Conclusions: This study demonstrates minimal differences in opioid pain medication use, patient satisfaction with postoperative pain control, and pain scores in a comparison of surgical technique as well as anesthesia type.

Type of study/level of evidence: Therapeutic IV.

Keywords: Analgesics; carpal tunnel; carpal tunnel release; opioid; opioid consumption.