Correct Answer: A

Rationale: The signs and symptoms of hyperkalemia include muscle weakness and cardiac arrhythmias, making choice A correct. Hyperkalemia can lead to dangerous cardiac effects, and calcium gluconate is used to stabilize the heart by antagonizing the effects of potassium. Choices B, C, and D describe symptoms and interventions that are not typically associated with hyperkalemia. Confusion and bradycardia are not common in hyperkalemia, and insulin and glucose are used in hyperkalemia only under specific circumstances. Fatigue and irregular heart rate are vague symptoms, and diuretics are not the primary treatment for hyperkalemia. Nausea and vomiting are nonspecific symptoms and sodium bicarbonate is not indicated for the management of hyperkalemia.

Correct Answer: B

Rationale: The correct answer is B: "Use a bed exit alarm system." For a client with dementia at risk for falls, a bed exit alarm system is beneficial as it alerts staff when the client is trying to get up, helping to reduce fall risks. Choice A, maintaining the client's bed in the lowest position, may not prevent falls as effectively as an alarm system. Choice C, assisting the client with ambulation every hour, may not be feasible and could disrupt the client's rest. Choice D, raising all 4 side rails for safety, can lead to restraint issues and is not recommended as a routine fall prevention measure.

Correct Answer: C

Rationale: The correct answer is C: 'Take medication for 6-9 months.' The priority teaching point for a client with tuberculosis is to ensure they understand the importance of completing the entire course of medication. This is crucial to effectively treat and cure tuberculosis, prevent the development of drug-resistant strains, and reduce the risk of transmission to others. Choice A is incorrect as wearing a surgical mask at all times is not the priority teaching point for tuberculosis home care. Choice B is not the priority teaching point; while limiting visitors can help reduce exposure to others, completing the medication course is more critical. Choice D is not relevant to tuberculosis home care instructions.

Correct Answer: B

Rationale: To prevent dislocation of the prosthesis after hip replacement surgery, it is essential to avoid bending the hip more than 90 degrees. This precaution helps maintain the stability of the hip joint and reduces the risk of prosthesis dislocation. Crossing legs at the knees (Choice A) can increase pressure on the hip joint, leading to instability. Sitting with legs elevated (Choice C) and avoiding placing a pillow under the knees (Choice D) do not directly address the risk of prosthesis dislocation.

Correct Answer: A

Rationale: The correct answer is to administer potassium-wasting diuretics. Hyperkalemia, which is high potassium levels, is managed by promoting the excretion of potassium from the body. Potassium-wasting diuretics help the kidneys eliminate excess potassium. Encouraging a low-potassium diet (choice B) is important for long-term management but not the immediate intervention for hyperkalemia. Administering potassium supplements (choice C) would worsen the condition by further increasing potassium levels. Administering IV fluids (choice D) may help with hydration but does not directly address the high potassium levels characteristic of hyperkalemia.