been there, done that on my left knee as well. after the surgery, I had to go back and have the 'drain' removed. the Dr said 'this will take a little bit' and he proceeded to pull on the clear tubing. after about 20 secs, I asked 'aren't you done yet?' and he said no, not yet. after a minute or so, he was done and then he showed me why it took a minute to pull out the drain. it was about SIX FEET LONG....all coiled up inside my knee!!!!
kneedless (ha ha) to say I recovered quite well and my left knee is actually better than my right, no surgery required, knee.
good luck with your recovery and ENJOY THE DRUGS!!!!