Correct Answer: C

Rationale: Correct Answer: C - Regular insulin Rationale: 1. Insulin promotes cellular uptake of potassium. 2. When insulin is administered, it moves potassium from extracellular to intracellular space. 3. This decreases plasma potassium levels safely. 4. Other options do not directly lower potassium levels in the same manner. Summary of Other Choices: A: Sodium polystyrene sulfonate - exchanges sodium for potassium in the intestines, not reducing total body potassium. B: Sodium polystyrene sulfonate with sorbitol - similar to A, does not reduce total body potassium. D: Calcium gluconate - does not directly lower potassium levels, used for treating hyperkalemia-induced cardiac toxicity.

Correct Answer: C

Rationale: The correct answer is C: Primary nursing. Primary nursing is a care delivery model where one nurse is responsible for the total care of a group of clients over a 24-hour period. This promotes continuity of care, individualized attention, and better nurse-client relationships. In primary nursing, the nurse plans and directs care, coordinates with other healthcare team members, and serves as the main point of contact for the clients. A: Case management involves coordinating care across different healthcare providers and services, not necessarily focusing on a specific group of clients over a 24-hour period. B: Team nursing involves a team of healthcare providers working together to deliver care, rather than one nurse being responsible for a specific group of clients over a 24-hour period. D: Functional nursing divides tasks among different healthcare team members based on their specific skills, which may not provide the same level of continuity and individualized care as primary nursing.

Correct Answer: D

Rationale: The correct answer is D because reducing patient errors is the most important outcome of effective communication in healthcare. Clear and accurate communication among healthcare providers and patients can prevent misunderstandings, leading to fewer errors in diagnosis, treatment, and medication administration. This ultimately improves patient safety and outcomes. A: Demonstrating caring practices to family members is important but not the most crucial outcome of effective communication in healthcare. B: Ensuring that patient teaching is provided is essential, but patient safety through error reduction takes precedence. C: Meeting the diversity needs of patients is crucial for patient-centered care, but error reduction directly impacts patient safety, making it more critical.

Correct Answer: C

Rationale: The correct answer is C: Trying to maintain a level of control over the situation. The family member staying at the bedside constantly and even napping there is likely trying to cope with the stressful situation by maintaining a sense of control and connection to the patient. This behavior can be a way for the family member to feel more involved and helpful during a time of uncertainty and powerlessness. Choices A and B involve negative assumptions about the family member's intentions without evidence. Choice D may be a result of the family member's actions but does not address the underlying motivation for their behavior.

Correct Answer: B

Rationale: The correct answer is B. Renal dysfunction is common in critically ill patients due to various factors like sepsis, hypotension, and nephrotoxic medications. This affects nearly two thirds of patients, making it a significant issue in critical care. Choices A, C, and D are incorrect. A is wrong because renal dysfunction is not rare in critically ill patients. C is incorrect as renal replacement therapy does not guarantee low mortality rates. D is inaccurate as renal dysfunction can have a significant impact on morbidity, mortality, and quality of life in critically ill patients.