RecruitingPhase 2Drug trialReversal of Spinal Anesthesia Residual Motor Block Via Intrathecal CatheterThe purpose of this study is to determine the feasibility of administering a predetermined amount of normal saline into the intrathecal or subarachnoid space via a small spinal catheter to reduce or eliminate the effects of previously injected spinal anesthetic following lower extremity orthopedic surgery.