Think of it this way: If there IS an anesthesia school that would accept a small, largely non-acute ICU as adequate experience, would you want to attend there, or graduate from such a program? You want to be in the most successful environment you can place yourself in, to get into a successful program so that you in turn are a successful CRNA. Get into the largest, most acute ICU setting you can. Spend at a minimum one year in that ICU. CT, Trauma, Medical, makes little difference. Those with more cardiac experience need to learn more medical complications and treatments during school, and vice versa.