Answered your other question...
What size dog is this???? If this is a small dog, surgery for ACL tears is no longer recommended!!! For large dogs, it is!!! The Patella Luxation should be graded from 1-5.....What grade is your dog's??? Surgery is only used on grades 4 & 5.....
If you've got a Vet screaming for immediate surgery, you need to proceed with caution.....Plus, since your Vet will be back tomorrow, he/she needs to get your dog's pain under control...The metacam is not strong enough in the beginning stage of this kind of injury....
Please come back & let us know......Thanks