I'm a nurse tech, I believe the same as nurse exturn. The position in only for nursing students. I'm on a cardiovascular unit that specializes in chest pain rule out, post cardiac cath procedures and various other things. I take lots of vitals, transport patients to Xray, ultrasound, discharge to car. I can draw blood for labs, insert catheters, take blood sugars and get 12 EKGs set up. Last week my nurse evan taught me to pull a femoral sheath! Not that I would do that myself but still cool. Good luck with your externship, you'lle learn a lot!