Correct Answer: B

Rationale: During stage three of bone healing, callus formation occurs. This process involves the formation of a soft callus made of collagen and cartilage, which bridges the gap between bone fragments. Choice A, consolidation, typically happens in later stages and involves the hardening of the callus into mature bone. Choices C and D are incorrect as granulation formation and hematoma formation occur in earlier stages of bone healing, specifically stages one and two, respectively.

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: D

Rationale: Tinnitus is the correct answer. Tinnitus refers to the perception of noise or ringing in the ears. This condition can be constant or intermittent and may be caused by various factors such as exposure to loud noises, ear infections, or underlying health conditions. Choices A, B, and C are incorrect as Weber and Rinne tests are related to hearing assessment, while the pinna is the external part of the ear responsible for collecting sound waves.

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.

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.