This is a really difficult situation. Adhesions can heal. Certainly do not give up hope. I suspect that this will be a fight for both you and your husband but it one worth taking.
My best advise is to keep very close contact with your doctors. It may also be helpful to have home health coming regularly to ensure that there is very good wound care.
Also, you'll want to watch for any signs of infection at the wound site like expanding redness or pus forming.
Best wishes. I hope this gets better soon for you and husband.