Which statement is true regarding healing of burns?

A. Increased venous pressure causing edema in the legs is incorrect because edema and venous congestion are associated with venous insufficiency, not intermittent claudication. Intermittent claudication is an arterial problem, not a venous one.

B. Decreased blood flow in leg muscles due to atherosclerosis is correct because atherosclerotic plaques narrow the arteries, reducing oxygen-rich blood flow to the muscles during activity. When the leg muscles require more oxygen during exercise or walking, the insufficient blood supply leads to ischemia, causing pain, cramping, or fatigue. This pain typically resolves with rest, which is why it is called intermittent claudication.

C. Increased cardiac output leading to muscle fatigue is incorrect because the pain is not due to cardiac output. While heart function affects overall perfusion, intermittent claudication is localized ischemic pain in the leg muscles caused by arterial obstruction, not by the heart pumping more blood.

D. Decreased stimulation of nerves in the leg muscles is incorrect because the pain results from ischemia, not nerve inactivity. In fact, nerve endings in the muscles may contribute to the sensation of pain due to oxygen deprivation, but the primary cause is reduced arterial blood flow.

A. Elevation of the legs increases pain in those with varicose veins is incorrect because elevating the legs actually relieves discomfort. Elevation reduces venous pressure and improves blood return to the heart, which decreases pain, swelling, and the feeling of heaviness in the legs.

B. The main cause of varicose veins is atherosclerosis is incorrect because varicose veins are primarily caused by venous valve incompetence, leading to venous dilation and blood pooling, not by arterial plaque buildup. Atherosclerosis affects arteries, not veins.

C. Individuals with varicose veins are not likely to develop peripheral edema is incorrect because venous insufficiency can cause fluid to accumulate in the tissues, leading to peripheral edema, particularly in the lower extremities after prolonged standing or at the end of the day.

D. Standing for long periods of time increases the risk of developing varicose veins is correct because prolonged standing or sitting without movement increases venous pressure in the legs, which stresses vein walls and valves. Over time, this can lead to valve dysfunction, vein dilation, and varicose vein formation. Other risk factors include obesity, pregnancy, aging, and family history.