I currently work in a level III and we have surgery, micros, nitric and cooling. The only thing we don't have is ECMO. My advice to you would make sure you tell your preceptor what you're comfortable with and what you're not that way you can really focus on what you need to learn. Also, if at the end of your 8 weeks you're still not comfortable with caring for these types of patients, tell your preceptor. I precept new grads and new employees and if I feel they arn't ready to be on their own or they tell me they arn't comfortable with their skills on a certain type of patient we just extend their orientation. It usually isn't a big deal. Hope this helps!