I too have one of those place 'credit card' cards that I have in my purse ....I cant wait to use it in the airport I have it on me all the time too.....

I also purchased one of the medical bracelets with my details on both sides, detailing the implant, Dr's name, No MRI's and phone numbers. It is NEVER taken off my hand, told to wear it on my left wrist, as apparently that is where the emergency services look first if you are in an accident etc. Better to be safe than sorry