Compression Neuropathy

This research study aims to evaluate injectional pain at the site of needle insertion for corticosteroid injections (CSI) of the upper extremity depending on different modes of anesthetics. Each individual's perception of pain upon receiving a CSI with two out of three modes of anesthesia (control/no anesthesia, vibrational anesthesia, vapo-coolant anesthesia) will be utilized to compare these variables and determine the method that is associated with the least pain.

The investigators have found recent promising data supporting the use of a currently FDA approved drug, 4-aminopyridine, in the treatment of nerve injury including compression neuropathy. The purpose of this research is determine whether 4-aminopyridine can treat carpal tunnel syndrome or delay the need for formal surgical release in patients with known carpal tunnel syndrome who would otherwise undergo surgery.