Tourniquet vs. no Tourniquet During Total Knee Arthroplasty

Inclusion Criteria: 1. All unilateral primary knee arthroplasties performed by investigators participating in this study will be eligible for inclusion 2. Diagnosis of osteoarthritis Exclusion Criteria: 1. Revision surgery 2. Bilateral knee surgery 3. Age \<18 or \>80 4. BMI \>40 5. Baseline lower extremity strength less than 5/5 6. Vascular calcifications 7. History of chronic narcotic use, defined as more than 5mg of oxycodone q4 hours 8. Functionally limiting spine disease 9. Other functionally limiting lower extremity disorder (i.e. symptomatic ipsilateral hip disease) 10. Patients who cannot perform the baseline functional tests 11. Allergy/contraindication to protocol medications 12. Post-traumatic arthritis 13. Inflammatory arthritis 14. Pregnancy 15. Prisoners 16. Patients receiving care as part of a worker's compensable injury