What phase of wound healing occurs at the time of injury and lasts about 35 days?

Choice A reason: A bone fragment has injured the nerve supply in the area is not the best response by the nurse. This may be a possible complication of a fracture, but it does not explain the mechanism of compartment syndrome. Compartment syndrome is a condition where the pressure within a closed space (such as a muscle compartment) exceeds the perfusion pressure and causes ischemia and necrosis of the tissues. A bone fragment may damage the nerve, but it does not cause increased pressure in the compartment.

Choice B reason: An injured artery causes impaired arterial perfusion through the compartment is not the best response by the nurse. This may be a possible cause of compartment syndrome, but it is not the most common one. Compartment syndrome is more often caused by venous obstruction than arterial obstruction. An injured artery may reduce the blood flow to the compartment, but it does not cause increased pressure in the compartment.

Choice C reason: Bleeding and swelling cause increased pressure in an area that cannot expand is the best response by the nurse. This is the most common cause of compartment syndrome and explains the pathophysiology of the condition. Bleeding and swelling are the result of inflammation and tissue injury that occur after a fracture. They increase the volume of fluid in the compartment, which cannot expand due to the rigid fascia that surrounds it. This leads to increased pressure in the compartment, which compresses the blood vessels, nerves, and muscles and causes ischemia and necrosis of the tissues.

Choice D reason: The fascia expands with injury, causing pressure on underlying nerves and muscles is not the best response by the nurse. This is not a correct statement, as the fascia does not expand with injury. The fascia is a tough connective tissue that encloses the muscle compartments and limits their expansion. The fascia is part of the problem, not the cause, of compartment syndrome. The fascia prevents the compartment from accommodating the increased volume of fluid and causes increased pressure in the compartment.

Choice A reason: Pulmonary embolism is not the correct answer, because it is a condition that affects the lungs, not the arm. Pulmonary embolism is a blockage of one or more arteries in the lungs by a blood clot, which can cause shortness of breath, chest pain, and coughing up blood.

Choice B reason: Ischial tuberosity is not the correct answer, because it is a bony projection on the pelvis, not the arm. Ischial tuberosity is the part of the pelvis that supports the weight of the body when sitting, and it can be injured by trauma, overuse, or infection.

Choice C reason: Compartment syndrome is the correct answer, because it is a condition that affects the arm, and it matches the symptoms of the client. Compartment syndrome is a serious complication of a traumatic injury, such as a fracture, that causes increased pressure within a closed space of the body, such as the forearm. This pressure can compromise the blood flow and nerve function of the affected area, causing pain, numbness, weakness, and pale skin.

Choice D reason: Broken arm syndrome is not the correct answer, because it is not a real medical condition. Broken arm syndrome is a madeup term that does not describe any specific diagnosis or treatment.