Nurse - the right hand doctor. She writes on the instructions of the doctor recipes , information , referrals for testing. In hospitals, nurses keep order in the wards , patients are organizing mode is sent to the designated doctor examination , give medication. During operations, the nurse may act physicians assistants - submit scalpels , clamps , needles . Direct duty nurses - injections , immunizations , blood pressure measurement . The nurse , as opposed to a doctor and paramedic - has no right to appoint a course of treatment and prescribe their own discretion .