A patient is being discharged from the healthcare facility following surgical re

A patient is being discharged from the healthcare facility following surgical replacement of a mitral valve with a mechanical valve. The patient asks the nurse how much longer he will need to take warfarin (Coumadin). What is the nurse’s best response?
1. “You will be on it for the rest of your life because you have a mechanical valve.”
2. “That will depend upon your surgeon. Ask him when you go to your office visit.”
3. “You will be on it for the rest of your life because you have a biologic tissue valve.”
4. “You will be told when to stop, which means your mechanical prosthetic valve is probably healed and there is minimal risk of clots.”