
    failure to enroll
  
['pain']
['clonidine', 'ropivacaine']

        Inclusion Criteria:

          1. Patient undergoing foot or ankle surgery with popliteal nerve block planned for
             postoperative analgesia.

          2. Adult, 19 years of age and older.

          3. Subject classified as American Society of Anesthesiology (ASA) class 1, 2, or 3. The
             ASA defines these statuses as follows: 1-A normal healthy patient. 2-A patient with
             mild systemic disease. 3-A patient with severe systemic disease.

             -

        Exclusion Criteria:

          1. Any subject not classified as an ASA 1, 2, or 3.

          2. Allergy/intolerance to local anesthetic, clonidine, and/or oxycodone.

          3. Subject with a history of continuous opioid use for greater than one month prior to
             surgery.

          4. Pre-existing neurologic deficit in lower extremity (surgical site).

          5. Clinically significant coagulopathy (hemophilia, von Willebrand disease).

          6. Patients who fail to follow the UAB Department of Anesthesiology Algorithm for the
             Preoperative Management of an Angiotensin Converting Enzyme Inhibitor (ACEI) or an
             Angiotensin Receptor Blocker (ARB). A copy of the algorithm can be found in Appendix
             1. -
      