Peripheral nerve injury after local anesthetic injection.

Background: A well-known complication of peripheral nerve block is peripheral nerve injury, whether from the needle or toxicity of the medication used. In this study, we sought to determine the extent of damage that results from intrafascicular injection of various commonly used local anesthetics (LAs).

Methods: Sixteen Lewis rats received an intrafascicular injection of saline (control) or 1 of 3 LAs (bupivacaine, lidocaine, or ropivacaine) into the sciatic nerve (n = 4).

Revision carpal tunnel surgery: a 10-year review of intraoperative findings and outcomes.

Purpose: To evaluate intraoperative findings and outcomes of revision carpal tunnel release (CTR) and to identify predictors of pain outcomes.

Methods: We performed a retrospective cohort study of all adult patients undergoing revision CTR between 2001 and 2012. Patients were classified according to whether they presented with persistent, recurrent, or new symptoms.