Correct Answer: C

Rationale: The correct answer is C: Interdependent intervention. This type of nursing intervention involves collaboration with other healthcare professionals to provide holistic care. In this scenario, the nurse is following a protocol set by the health care agency, which likely involves input and guidance from various team members. The nurse's actions require coordination and communication with others to ensure the best outcome for the client. Choice A (Independent intervention) would involve actions that the nurse can perform autonomously without requiring direction from others. Choice B (Dependent intervention) would require an order or prescription from a healthcare provider for the nurse to carry out. Choice D (Collaborative intervention) involves working together with other healthcare professionals on a specific aspect of care, but in this case, the nurse is primarily following a set protocol without necessarily actively collaborating with others during the task.

Correct Answer: A

Rationale: The correct answer is A because asthma is characterized by inflammation and bronchoconstriction of the airways, leading to difficulty breathing. This explanation accurately describes the pathophysiology of asthma. Explanation for other choices: B: Fluid in the lungs is more indicative of conditions like pneumonia or pulmonary edema, not asthma. C: Asthma involves airway constriction and inflammation, not stretching and non-functionality. D: Asthma is not caused by infection but rather triggered by factors like allergens or irritants.

Correct Answer: D

Rationale: The correct answer is D: Hypomagnesemia. Dehydration can lead to electrolyte imbalances, and hypomagnesemia can cause confusion in elderly patients. Magnesium plays a crucial role in brain function and its deficiency can result in cognitive impairment. Hyponatremia (A) typically presents with symptoms like weakness and confusion but not necessarily dehydration. Hypercalcemia (B) and hyperkalemia (C) are less likely to cause confusion in this scenario. Therefore, hypomagnesemia is the most likely electrolyte imbalance involved in the elderly nursing home resident's confusion.

Correct Answer: C

Rationale: The correct answer is C because flushing the central venous catheter with a heparinized solution before blood withdrawal is essential to maintain catheter patency and prevent clot formation. This step ensures the catheter is clear of any blockages, allowing for accurate blood sampling. Choice A is incorrect because assembling supplies should come after preparing the catheter. Choice B is incorrect as discarding blood before flushing the catheter may lead to inaccurate test results. Choice D is incorrect as replacing the catheter cap without flushing may lead to clot formation and catheter malfunction.

Correct Answer: D

Rationale: The correct answer is D because a respiratory rate of 8 breaths/min indicates respiratory depression, a serious adverse effect of morphine. Morphine is a central nervous system depressant that can suppress the respiratory drive, leading to hypoventilation and potentially respiratory failure. This is a life-threatening complication that requires immediate intervention. A: Voiding of 350mL of concentrated urine is not typically associated with morphine use. B: An irregular heart rate of 82 beats/min is within a normal range and not a common adverse effect of morphine. C: Pupils constricted and equal is a common side effect of morphine due to its action on the central nervous system, not necessarily indicating an adverse effect.