... glue. He was sent home the next day and returned to the hospital within 2 hours due to severe pain. He also lost feeling in his lower body. Emergency surgery Sunday detected a blood clot at the surgery site so a clean up was performed and a drain was put in. Now, his blood oxygen levels are only 78%. We were told that his carotid artery is 80% blocked but no stent will be done until the blockage is 85% or higher. What could be going on?