Thrilling story. That would definitely be on my list of top ten patients to never forget.
Beyond the last paragraph, which everyone has already commented on, I did have a suggestion for you. I think you need to work on what tense you want the story to be in. You start off in past tense, then do a good job transitioning over to present tense… except then in a couple of spots you use past tense again.
If you want to tell the story in past tense, then the only part I would leave in present tense is when you quote the wording from the hospital report.