A 38-year-old man has come into the urgent care center with severe hip pain after falling from a ladder at work. He says he has taken several pain pills over the past few hours but cannot remember how many he has taken. He hands the nurse an empty bottle of acetaminophen (Tylenol). The nurse is aware that the most serious toxic effect of acute acetaminophen overdose is which condition?

Choice A reason: Burning pain and tingling in extremities are not symptoms of autonomic neuropathy, but of peripheral neuropathy. Peripheral neuropathy affects the sensory and motor nerves that innervate the skin, muscles, and joints. It can cause pain, numbness, weakness, and loss of sensation in the extremities. Autonomic neuropathy affects the nerves that control the involuntary functions of the body, such as digestion, blood pressure, heart rate, and sweating.

Choice B reason: Nausea and feeling of abdominal fullness are symptoms of autonomic neuropathy, specifically of gastroparesis. Gastroparesis is a condition where the stomach muscles are weakened or paralyzed, and cannot move food properly. It can cause delayed gastric emptying, nausea, vomiting, bloating, early satiety, and poor blood glucose control. Autonomic neuropathy can damage the vagus nerve, which regulates the stomach motility and secretion.

Choice C reason: Elevated blood pressure and delayed capillary refill are not symptoms of autonomic neuropathy, but of cardiovascular problems. Blood pressure is the force of blood against the walls of the arteries, and capillary refill is the time it takes for the color to return to the nail bed after pressing on it. Elevated blood pressure can indicate hypertension, which is a risk factor for heart disease and stroke. Delayed capillary refill can indicate poor blood circulation, which can be caused by atherosclerosis, peripheral artery disease, or shock. Autonomic neuropathy can affect the blood pressure and heart rate, but usually causes hypotension and tachycardia, not hypertension and delayed capillary refill.

Choice D reason: Increased thirst and excessive urination are not symptoms of autonomic neuropathy, but of diabetes mellitus. Diabetes mellitus is a condition where the body cannot produce or use insulin properly, and the blood glucose level becomes too high. Increased thirst and excessive urination are signs of hyperglycemia, which is a high blood glucose level. Hyperglycemia can cause dehydration, electrolyte imbalance, and ketoacidosis. Autonomic neuropathy can be a complication of diabetes mellitus, but it does not cause increased thirst and excessive urination.

Choice A reason: This statement is true. Fluid volume deficit, or hypovolemia, is a condition where the body loses more fluid than it gains. It can be caused by fluid loss from vomiting, diarrhea, bleeding, or excessive sweating. Fluid volume deficit can lead to dehydration, hypotension, tachycardia, and shock.

Choice B reason: This statement is false. Sodium imbalance, or dysnatremia, is a condition where the blood sodium level is either too high or too low. It can be caused by fluid imbalance, kidney disease, hormonal disorders, or medications. Sodium imbalance can affect the brain function, causing confusion, seizures, or coma.

Choice C reason: This statement is false. Potassium imbalance, or dyskalemia, is a condition where the blood potassium level is either too high or too low. It can be caused by kidney disease, acid-base disorders, medications, or dietary intake. Potassium imbalance can affect the heart function, causing arrhythmias, cardiac arrest, or death.

Choice D reason: This statement is false. Fluid volume excess, or hypervolemia, is a condition where the body gains more fluid than it loses. It can be caused by fluid overload, heart failure, kidney failure, or liver disease. Fluid volume excess can lead to edema, hypertension, dyspnea, and pulmonary congestion.