but it wasn't. >> and chief medical correspondent dr. sanjay gupta joins me. you've been looking into this case for the past year. let's start at the beginning. at what point did miles feel it was more than a bruise and definitely needed more medical attention? >> well, you know he was in the philippines. he had this injury. again, it was just that bruise. i think his hand started to tingle. he was starting to have a little bit more pain. 48 hours went by, jake before he went to the hospital. i think it was just the increasing pain. it should have been getting better. it wasn't. i think that's what took him to the hospital. >> the amputation happened while miles was under anesthesia. explain how this turned into a life threatening procedure. >> well this is a thankfully relatively rare occurrence but it does happen. it's something known as acute compartment syndrome. in the arm and all your extremityies you have a compartment with your arteries veins, nerves and muscle.