Final answer:
The RN is responsible for completing the nursing assessment and initial patient care plan, which includes obtaining the patient's health history and ensuring personalized care.
Step-by-step explanation:
The essential part of the admission procedure performed by a Registered Nurse (RN) is completing the nursing assessment and initial patient care plan. This involves obtaining the patient's health history, a crucial step to provide personalized care. Under the direct supervision of a registered nurse, patients receive comprehensive care that includes reviewing their historical medical information and current condition. RNs also assess and respond to patient needs both before and during medical treatments, ensuring a safe and effective treatment process, including the monitoring of procedures like dialysis. Additionally, RNs play a vital role in ensuring that all equipment is sterile and operational and that the team communicates effectively about the patient's identity, health background, and specific needs for the procedure or treatment.