### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
yESI HAVE QUESTIONS ABOUT A KNEE REPLACEMENT GONE WRONGI HAD MY RIGHT KNEE REPLACED IN October 2012It caused me trouble from the surgery on.It swelledIt is painful all of the timeThe doctor who did the surgery did a bone scan and told me the knee had to be replaced again..That I would never recoverI was afraid to have more surgery by that same doctor so I came to Mayo Clinic RochesterThey told me the knee does need to be removed, but not until I have a hip replacement firstThat is scheduled for tomorrowThe doctor told me my bad hip should have been treated first and that it is difficult to rehab a knee with a bad hip.He told me he will replace the knee in 3 months.I cannot straighten my leg.It hurts night and day and now I need more surgery.What can I do?I will be either in surgery or rehab until at least mid November.Also I got my medical records on the surgery. The knee components I have, a nexgen knee by Zimmer is on a recall list dated Dec 3, 2010. I was never notified that I was getting recalled parts. How is this possible?I mean to say the exact serial number of my part is on the list.

### output:

Hi, Your concern are true, and the trauma you have gone through is quite understandable. I feel now you are in best of hands at Mayo Clinic, and they have a world reputation. it's true that if hip is not OK the rehab of the knee becomes even worst, the second thing is that, you have no other option than to get them replaced. Take care, have faith in the doctor at Mayo, and god. I have faith that things will now become alright.