Comparison of Local-Only Anesthesia Versus Sedation in Patients Undergoing Staged Bilateral Carpal Tunnel Release: A Randomized Trial.

PURPOSE: Carpal tunnel syndrome is a common disease treated operatively. During the operation, the patient may be wide-awake or sedated. The current literature has only compared separate cohorts. We sought to compare patient experience with both local-only anesthesia and sedation.

METHODS: Staged bilateral carpal tunnel release utilizing open or endoscopic technique was scheduled and followed through to completion of per-protocol analysis in 31 patients. Patients chose initial hand laterality and were randomized regarding initial anesthesia method: local-only or sedation. Data collection via questionnaires began at consent and continued to 6 weeks postoperatively from second procedure. Primary outcome measures included patient satisfaction and patient anesthesia preference.

RESULTS: At final follow-up, 6 weeks postoperatively, high satisfaction (30 of 31 patients per method) was reported with both types of anesthesia. Among these patients, 17 (54%) preferred local-only anesthesia, 10 (34%) preferred sedation, 2 had no preference, and 2 opted out of response. Although anesthesia fees were approximately $390 lower with local-only anesthesia, total costs for carpal tunnel release were not significantly different with respect to the anesthesia cohorts. Total time in surgical facility was approximately 26 minutes quicker with local-only anesthesia, largely due to shorter time in the post-anesthesia care unit. Scaled comparison of worst postoperative pain following the 2 procedures revealed no difference between local-only anesthesia and sedation.

CONCLUSIONS: Patients reported equal satisfaction scores with carpal tunnel release whether performed under local-only anesthesia or with sedation. In addition, local-only anesthesia was indicated as the preference of patients in 59% of cases.