Correct Answer: B

Rationale: The correct answer is B: Injury to the nerves. Resting the underside of the arm on the crutch pad can injure the nerves. Choice A, an abnormal stance, is not directly related to nerve injury while using crutches. Choice C, a fall and further injury, is a general risk associated with improper crutch use but does not specifically address nerve injury. Choice D, skin breakdown, is a concern related to pressure ulcers but not the primary focus when discussing injury prevention related to crutch use.

Correct Answer: B

Rationale: Confirming the patient's allergies before administering medications is crucial for patient safety as it helps prevent adverse reactions. Checking the patient's wristband is important for identification but may not directly impact medication safety. Documenting medications after administration is necessary but does not primarily promote safety during administration. Preparing medications at the medication cart, rather than the nurse's station, is preferred to ensure accuracy and proper medication handling, but it is not directly related to confirming allergies for safety.

Correct Answer: B

Rationale: Administering oxygen via nasal cannula as prescribed is the most appropriate action to improve the patient's oxygenation in COPD. Oxygen therapy helps maintain adequate oxygen levels in the blood, which is crucial for managing COPD. Encouraging the use of incentive spirometry, assisting with coughing and deep breathing exercises, and positioning the patient in high Fowler's position are all beneficial interventions, but administering oxygen is the priority for immediate oxygenation support in COPD.

Correct Answer: B

Rationale: Providing the immobile patient with a special mattress is an effective way to prevent pressure ulcers. Special mattresses help distribute pressure evenly and reduce the risk of developing pressure ulcers by relieving pressure on sensitive areas. Turning the patient every 4 hours (Choice A) is a standard practice to prevent pressure ulcers but may not be as effective as using a special mattress. Elevating the patient's legs (Choice C) can help with circulation but may not directly prevent pressure ulcers. Limiting the patient's movement (Choice D) can lead to other complications and is not a recommended method for preventing pressure ulcers.

Correct Answer: B

Rationale: The correct answer is to contact the stoma nurse to assist the client with care. Stoma nurses are specially trained to provide guidance on stoma care, especially for clients with new ostomies. Instructing the client to care for the stoma independently (Choice A) may not be appropriate initially as they may need professional guidance. Delegating the care of the stoma to a nursing assistant (Choice C) is not recommended as specialized care is required. Waiting until the next shift (Choice D) is not ideal as stoma care should not be delayed.