The same thing has happened to us and we are no nearer to finding out what to do other than go for the op again - more money and more stress!
I will let you know if I find anything out
You need to speak with your surgeon right away. There are medications that your husband can take to possibly alleviate any swelling that may be occuring in the tubes. If he tells you there is nothing he can do, get a second opinion. It doesn't always work, but it is definately worth trying.