My husband just had his sternum removed and the next morning he coughed and started bleeding. They had to take him back into surgery and repair a tear on the heart outside muscle area. He has been in a drug induced "sleep state" since then to allow him to heal. They said they will "wake him" in about 7 days. What kind of test do they do to see if he has healed enough? Also what kinds of activies will he have to avoid from now on.