Correct Answer: C

Rationale: The correct instruction for a client with left-leg weakness using a cane is to maintain two points of support on the floor at all times. This technique provides stability and support while walking. Choice A is incorrect because the cane should be used on the stronger side to support the weaker leg. Choice B is incorrect as advancing the cane and the strong leg together may not provide adequate support and balance. Choice D is incorrect as the distance to advance the cane with each step can vary depending on the individual's needs and abilities.

Correct Answer: B

Rationale: The correct teaching point for a client with left-leg weakness learning to use a cane is to maintain two points of support on the floor at all times. This ensures better stability and support for the client while walking. Choice A is incorrect because the cane should be used on the stronger side to support the weaker leg. Choice C is incorrect as advancing the cane too far with each step may compromise balance. Choice D is incorrect because advancing the cane and the strong leg together may not provide adequate support for the weaker leg.

Correct Answer: C

Rationale: The correct instruction for the client with left-leg weakness using a cane is to maintain two points of support on the floor. This ensures stability and balance while walking. Choice A is incorrect because the cane should be used on the strong side of the body to provide additional support. Choice B is incorrect as the cane and the weak leg should move together for support. Choice D is incorrect as advancing the cane too far with each step may compromise balance and stability.

Correct Answer: A

Rationale: The correct intervention for a client with hyperkalemia is to administer calcium gluconate. Calcium gluconate helps counteract the effects of hyperkalemia by stabilizing the cardiac cell membrane. Increasing fluid intake (Choice B) may not effectively lower potassium levels. Administering a diuretic (Choice C) or sodium bicarbonate (Choice D) is not the primary treatment for hyperkalemia and may not address the immediate need to lower potassium levels.

Correct Answer: C

Rationale: The correct answer is C: Administer an incentive spirometer. Using an incentive spirometer helps prevent atelectasis by encouraging lung expansion after surgery. Encouraging deep breathing exercises (choice A) is beneficial but may not be as effective as an incentive spirometer. Encouraging the client to cough (choice B) helps with airway clearance but does not directly prevent atelectasis. Assisting the client to ambulate (choice D) is important for preventing complications such as deep vein thrombosis, but it is not the most effective intervention for preventing atelectasis.