A client asks the nurse about having a total knee arthroplasty to relieve joint pain. Which factor would place the client at the highest risk for impaired postoperative healing?

Choice A reason: Bisphosphonates are generally safe for clients with diabetes and normal renal function (serum creatinine 0.8 mg/dL is within normal range, indicating adequate kidney function). These drugs inhibit osteoclast activity, reducing bone resorption, and are not contraindicated in diabetes unless renal impairment is present, which is not the case here.
Choice B reason: Vertebral compression fractures are a common complication of osteoporosis. Bisphosphonates are often prescribed to strengthen bones and prevent further fractures by inhibiting bone resorption. Recent fractures do not contraindicate their use; in fact, they are indicated to improve bone density and reduce future fracture risk.
Choice C reason: Calcium channel blockers, used for hypertension, do not interact significantly with bisphosphonates. These drugs work on different systems—bisphosphonates on bone metabolism and calcium channel blockers on vascular smooth muscle. There is no evidence suggesting this combination poses a risk, making bisphosphonates appropriate for this client.
Choice D reason: Bisphosphonates, especially oral ones, require patients to sit upright for 30–60 minutes post-dose to prevent esophageal irritation and ensure proper absorption. A client with a spinal cord injury unable to tolerate sitting up cannot comply with this requirement, increasing the risk of esophageal damage, making bisphosphonates a poor choice.

Choice A reason: Vitamin D enhances calcium absorption in the intestines, critical for bone mineralization during fracture healing. Baked fish (rich in protein) and orange juice (vitamin C source) support collagen formation, making this a comprehensive choice for bone repair and tissue recovery.
Choice B reason: Vitamin B supports energy metabolism but has no direct role in bone healing. A bacon, lettuce, and tomato sandwich lacks significant calcium or vitamin D, essential for osteoblast activity and bone matrix formation, making it less effective for fracture recovery.
Choice C reason: Vitamin A supports epithelial tissue but is less critical for bone healing than vitamin D or calcium. Vegetable lasagna and salad provide some nutrients but lack the specific bone-supporting elements like calcium, making this choice suboptimal.
Choice D reason: Vitamin C aids collagen synthesis, and low-fat milk provides calcium, both beneficial for fracture healing. However, it lacks vitamin D, which is essential for calcium absorption, making it less comprehensive than the vitamin D-inclusive option for optimal bone repair.