Correct Answer: A

Rationale: Placing the bed in the lowest possible position increases the risk of injury because it does not support proper body mechanics. When lifting a client, it is important to have the bed at a comfortable height to avoid strain. Using the legs when lifting (choice B) is correct as it reduces the strain on the back. Keeping feet apart to provide a wide base of support (choice C) helps with stability and balance. Facing the direction of the movement (choice D) is essential for maintaining proper alignment and reducing the risk of injury.

Correct Answer: D

Rationale: Hypoxemia is one of the earliest signs of fat embolism syndrome. In fat embolism syndrome, fat globules enter the bloodstream and can obstruct blood flow in the lungs, leading to hypoxemia. Paresthesia, severe pain unrelieved by medication, and edema are not typically among the earliest signs of fat embolism syndrome.

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 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.