Correct Answer: C

Rationale: The correct answer is C: Back. Back injuries are common among healthcare workers, especially nurses, due to improper lifting techniques and bending. Working on an orthopedic rehabilitation unit involves frequent lifting and positioning of patients, putting the nurse at risk of back injuries. Preventing back injuries is crucial for maintaining the nurse's health and ability to provide care effectively. Choices A, B, and D are incorrect because while lifting and positioning patients may involve these body parts, back injuries are most likely to occur due to the strain and stress placed on the back during such activities.

Correct Answer: C

Rationale: Shortness of breath is the most concerning assessment finding in a client with a history of atrial fibrillation. It can indicate a worsening of the condition, pulmonary edema, or the development of a complication such as heart failure. A blood pressure of 150/90 mmHg, while elevated, is not as immediately concerning as respiratory distress in this context. An irregular heart rhythm is expected in atrial fibrillation and may not necessarily be a new or concerning finding. Fatigue is a common symptom in atrial fibrillation but is not as acutely concerning as shortness of breath, which may indicate compromised oxygenation and circulation.

Correct Answer: A

Rationale: Elevating the head of the client's bed is the most appropriate action in this situation. It helps reduce noisy respirations and improves comfort for clients with terminal illnesses by facilitating better air exchange. Administering an opioid medication may not address the immediate issue of noisy respirations and shortness of breath caused by secretions in the airway. Performing oral suctioning without proper assessment and indication can be uncomfortable for the client and may not be necessary. Placing the client in a prone position can further compromise breathing and is not recommended for a client with respiratory distress.

Correct Answer: A

Rationale: Performing a physical assessment is the most appropriate initial nursing action in this scenario. A thorough physical assessment helps evaluate the client's current condition, severity of symptoms, and identify any immediate concerns. This assessment can provide crucial information to guide further interventions and treatment. Reviewing the client's medication list (choice B) is important but may not address the immediate need for assessing the client's current status. Instructing the client to elevate the legs (choice C) may be beneficial but should come after a thorough assessment. Obtaining a detailed dietary history (choice D) is relevant for heart failure management but is not the most urgent initial action when the client presents with acute symptoms like weight gain, leg swelling, and shortness of breath.

Correct Answer: C

Rationale: The Z-track method is used to minimize tissue irritation by sealing the medication in the muscle. This technique helps prevent leakage of the medication into subcutaneous tissue, reducing the risk of irritation and staining at the injection site. Option A about decreasing the risk of injecting medication into a blood vessel is not correct as the primary purpose of the Z-track method is to prevent tissue irritation. Option B stating it delays medication absorption is incorrect as the Z-track method does not affect the rate of medication absorption. Option D mentioning it accelerates medication excretion is incorrect as the Z-track method does not impact medication excretion but rather focuses on minimizing tissue irritation.