I lost 3 patients last night. One died on the table, two died in the ICU. All 3 died because of extremely morbid pathology. Type A dissection, massive PE, acute mesenteric ischemia. To be honest it didn't really affect me. Maybe a little worse mood overall, but that could have easily been the lack of sleep and being slightly sick. I feel for the families, I spent maybe an hour and a half talking with them during the night, but being busy and being in the OR distracts pretty darn well. At the same time, I think that for me personally, the fact that I know that none of us could have really done much to help them helps ease things.
Yes, younger patients, sudden deaths make things harder, but yes, you get desensitized. I think it would be very hard to survive training if you didn't.