Excerpt from "Your ER Survival Guide". Written by a veteran ER Doc, this booklet gives candid naked truths about the total ER experience -before during and after. Find out what you should expect in the ER from an insider in affordable booklet. This booklet shares insider's tips on common medical diagnostic and imaging procedures ordered in the ER. Learn why blood tests are ordered and what the results can mean. Don't just be irradiated, know why an imaging study, scan test is being ordered and how it can and can't help with your diagnosis. Your blood is precious why is it being drawn? Read what the tests can show.