Ambulatory Continuous Adductor Canal Block to Facilitate Same Day Discharge Following Total Knee Arthroplasty: A Pilot Study

Inclusion Criteria: 1. Male and females of 40-70years of age 2. Scheduled to undergo unilateral primary total knee arthroplasty 3. ASA Class I, II Exclusion Criteria: 1. ASA 3, 4 2. Revision surgery 3. Narcotic dependent (opioid intake morphine equivalent \> 10 mg/ day for more than 3 months) 4. Other sources of chronic pain like fibromyalgia 5. Patients with associated significant cardiac, CNS or respiratory disease (poor cardio-respiratory reserve) 6. Major conduction defects in EKG (bifascilular block, CHB); significant valvular heart disease 7. Recent MI/ Stroke/ CHF (in the past 3 months) 8. BMI\> 35 9. Obstructive sleep apnea (AHI \> 15) 10. Patients with coexisting hematological disorder or with deranged coagulation parameters. 11. Patients with pre-existing major organ dysfunction such as hepatic and renal failure. 12. Psychiatric illnesses 13. Uncontrolled diabetes mellitus 14. Lack of informed consent. 15. Allergy to any of the drugs used in the study 16. Preoperative neurological deficits 17. Use of walking aids preoperatively 18. Living alone (Lack of Chaperone/home help) 19. Language barrier 20. Contralateral leg weakness 21. Pregnancy