Correct Answer: B

Rationale: The correct answer is B, Dual-energy X-ray absorptiometry (DXA) scan, which is commonly used to diagnose osteoporosis by measuring bone mineral density. Phalen's maneuver (choice A) is a test used to assess for carpal tunnel syndrome and is not related to osteoporosis. Proprioception (choice C) refers to the sense of body position and is not a diagnostic test for osteoporosis. Blood culture (choice D) is used to detect infections caused by bacteria in the bloodstream and is not relevant to the diagnosis of osteoporosis.

Correct Answer: B

Rationale: The correct answer is B, avascular necrosis. Avascular necrosis is the condition where bone tissue dies due to the disruption of blood supply to the bone. Reflex sympathetic dystrophy (Choice A) is a chronic pain condition, delayed union (Choice C) refers to a delayed healing of a fracture, and complex regional pain syndrome (Choice D) is a chronic pain condition typically affecting an arm or leg.

Correct Answer: B

Rationale: The correct answer is B, Dual-energy X-ray absorptiometry (DXA) scan, which is commonly used to diagnose osteoporosis by measuring bone mineral density. Phalen's maneuver (choice A) is a test used to assess for carpal tunnel syndrome and is not related to osteoporosis. Proprioception (choice C) refers to the sense of body position and is not a diagnostic test for osteoporosis. Blood culture (choice D) is used to detect infections caused by bacteria in the bloodstream and is not relevant to the diagnosis of osteoporosis.

Correct Answer: B

Rationale: The best intervention to prevent deep vein thrombosis (DVT) after a fracture of the hip is to apply antiembolism stockings. These stockings help promote circulation and prevent blood clots from forming in the legs due to immobility. Encouraging bedrest is not recommended as it can increase the risk of DVT. While anticoagulants are used in some cases, the primary prevention method is mechanical prophylaxis like antiembolism stockings. Teaching about smoking cessation is important for overall health but is not directly related to preventing DVT in this scenario.

Correct Answer: D

Rationale: Venous stasis is a negative effect of immobility on the cardiovascular system. Immobility can lead to blood pooling in the veins due to lack of movement, increasing the risk of blood clots. Choices A, B, and C are incorrect because immobility does not lead to an increase in high density lipoprotein, circulation, or the pumping action of the heart.