This is a randomized, double-blinded pilot study to determine whether patients undergoing ambulatory total knee arthroplasty (TKA) using a subvastus approach benefit from the addition of a continuous adductor canal nerve block (cACB) catheter along with an existing multimodal approach to postoperative analgesia. Outcomes include the 15-item Quality of Recovery Scale (QoR-15) (Miles 2016), pain scores, opioid consumption, opioid-free days, functional outcome as measured by the Time Up and Go (TUG) test, patient satisfaction, patient's rating of catheter effectiveness, and complications.

Inclusion Criteria:

1. patient characteristics suitable for subvastus approach as determined by single surgeon
2. patients willing to undergo ambulatory surgery
3. ability to read and verbally communicate via either English or French

Exclusion Criteria:

1. age > 80
2. driving distance greater than 1 hour from hospital
3. no willing caregiver at home on night of surgery
4. renal failure requiring dialysis
5. Insulin-dependent diabetes mellitus
6. BMI > 45
7. allergy to study medications
8. pre-existing neurologic deficit involving the ipsilateral limb
9. chronic high dose opioid use (defined as >200mg/day of morphine equivalent for over 2 weeks).
10. inability to use or manage cACB catheter and pump independently at home
11. inability or refusal to cryocompressive therapy device.