A less than supportive spouse
Like Paul said, this is harder on the spouse than on the person having surgery. My wife and I went through this together. I had my Surgery on April 10th and hers was three weeks later. I was much more nervous about her surgery than I was my own. I knew she was doing the right thing, but it was so hard sitting in that waiting room while she was having it done. It was the longest 2 to 3 hours of my life, I did not feel better until I saw her in her room.
Remember, your wife will be going through a big change also and a lot of emotions, so she will need your support also. After supporting each other through this process, our marriage is better than ever.
Good luck
Jim