Forget using the CPM machine so strictly. Most surgeons don't use them any more.
They don't make any difference at all to your eventual Range of Motion (ROM). They only use passive movement and what really counts is movement you make using your own muscles.
Some people like them because they stop your knee from feeling so stiff. It's their only virtue, I think.
Since the use, or not, of a CPM makes no difference in the long run, I think the long and short of it is this:
- If your surgeon recommends it and you feel it is helpful, use it.
- If your surgeon recommends it and you hate it, don't use it.
- If your surgeon does not recommend it and you don't use it, your recovery will not be impeded.
As for ramping up the bend so quickly, that's quite unnecessary. Most surgeons are happy with about 90 degrees by 6 weeks.
There's no need to rush to get ROM (Range of Motion) because it can continue to improve for a year, or even much longer, after a knee replacement. There isn't any deadline you have to meet:
Myth busting: the "window of opportunity" in TKR
About the the Percocet - what was prescribed for you? You should take that on a regular schedule if it's working for you. If you feel that your pain control is inadequate, phone your surgeon and ask for your medications to be revised. You can't compare your need for medications with anyone else's.