did you like water pre-op?

 It's usually a doctor's appointment you have to make sure that you're ready for the surgery. 

When I had my knee surgery, it was an out-patient procedure where I was able to go home afterwards. I didn't have a pre-op appointment. The pre-op was done before my surgery. 

Anyway, they weigh you, take your blood pressure, your temperature, and your height. They may also do an EKG and a blood test. 

Hope this helps!