The CCRN examination is an exam given to those nurses with critical care experience, it’s required that you have 1,750 hours in the direct care of critically ill or acutely ill patients over the last two years. Now that might seem like a lot, 1,750 hours, but if you work full time, you’re working about 2000 hours a year. They also want the year that you apply for the exam, that you have 875 hours prior to taking the exam. So it’s a total of 1,750 hours within two years of taking the exam.