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: Filgrastim works by stimulating the production of white blood cells. Therefore, monitoring the white blood cell (WBC) count is essential to assess the effectiveness of the treatment. Choice B, serum potassium, is not directly affected by filgrastim therapy. Choice C, hemoglobin level, is important but not the primary indicator of filgrastim's effectiveness. Choice D, serum creatinine, is unrelated to the action of filgrastim and would not reflect its effectiveness.

Correct Answer: B

Rationale: The correct answer is to limit phosphorus and potassium intake for a client with chronic kidney disease. In renal insufficiency, the kidneys struggle to excrete these minerals, leading to their buildup in the blood, which can be harmful. Limiting phosphorus and potassium intake helps prevent further kidney damage and manage the progression of chronic kidney disease. Encouraging protein-rich foods (Choice C) may be counterproductive as excessive protein intake can burden the kidneys. Increasing potassium-rich foods (Choice A) is incorrect as high potassium levels can be detrimental in kidney disease. Increasing calcium-rich foods (Choice D) is not typically a focus in dietary teaching for chronic kidney disease unless there is a specific deficiency or need, as excessive calcium intake can also be harmful to kidney function.

Correct Answer: A

Rationale: The correct answer is A: Muscle weakness. Hypokalemia is characterized by low potassium levels in the blood, which can lead to muscle weakness. This occurs because potassium is essential for proper muscle function, and a deficiency can impair muscle strength. Nausea (choice B) is not a typical finding associated with hypokalemia. Tingling sensation (choice C) is more commonly linked to issues like nerve damage or poor blood circulation, rather than hypokalemia. Increased thirst (choice D) is not a direct symptom of hypokalemia; it is more commonly seen in conditions like diabetes or dehydration.

Correct Answer: C

Rationale: Placing a pillow between the legs is essential post-total hip arthroplasty to prevent adduction of the hip joint, reducing the risk of dislocation. Choices A, B, and D are incorrect. Using a walker while walking is encouraged for support and stability. Keeping the hip flexed at 90° while sitting can increase the risk of hip dislocation. Crossing legs at the ankles when sitting may also lead to hip dislocation.