Final answer:
Alex displays QSEN competencies of knowledge, patient-centered care, and safety by researching peritoneal dialysis, discussing patient preferences, and preparing to provide treatments under a registered nurse's supervision.
Step-by-step explanation:
In this scenario, Alex demonstrates several QSEN (Quality and Safety Education for Nurses) competencies by researching information about peritoneal dialysis prior to assessing his patient. First, he shows a commitment to knowledge, by seeking out information on a topic he is not familiar with. This action also demonstrates patient-centered care, as he involves the patient in discussing their preferences for the timing and method of the dialysis treatment, reflecting respect for the patient's values and needs. Moreover, the focus on providing safe and effective care is evident as Alex prepares to provide dialysis treatments under the direct supervision of a registered nurse, ensuring accurate and sterile procedures to maintain the patient's health and safety.