My husband, age 55 who had an open heart surgery this past April in the Cleveland Clinic, went to our local hospital for a CAT scan and had asperated when they laid him dowm. He was without oxygen to the brain for about 15 minutes & had brain damage . I kept him on resperators for 5 days while they ran 3 different tests to confirm no brain activity. When we took him off, 4 hous later he took a deep breath, let it out, gurrgled a little then foamed at the mouth. Why