A nurse is caring for a client who has COPD. The nurse should identify that the client is at risk for which of the following acid-base imbalances?

Choice A reason: Flank pain is not a sign of an allergic transfusion reaction. Flank pain is a pain in the side of the abdomen or back, usually caused by kidney problems, such as infection, stones, or injury. Flank pain can be a sign of a hemolytic transfusion reaction, which is a serious complication that occurs when the donor blood is incompatible with the recipient's blood type.

Choice B reason: Elevated blood pressure is not a sign of an allergic transfusion reaction. Elevated blood pressure is a condition where the force of the blood against the artery walls is too high, which can increase the risk of heart disease, stroke, and kidney damage. Elevated blood pressure can be a sign of a hypertensive transfusion reaction, which is a rare complication that occurs when the donor blood has a higher sodium level than the recipient's blood.

Choice C reason: Distended neck veins are not a sign of an allergic transfusion reaction. Distended neck veins are a sign of increased pressure in the right side of the heart or the superior vena cava, which can be caused by heart failure, pulmonary hypertension, or obstruction. Distended neck veins can be a sign of a circulatory overload transfusion reaction, which is a complication that occurs when the blood volume or rate of infusion is too high for the recipient's cardiovascular system.

Choice D reason: Wheezing is a sign of an allergic transfusion reaction. Wheezing is a high-pitched whistling sound that occurs when the airways are narrowed or inflamed, which can cause difficulty breathing, coughing, or chest tightness. Wheezing can be a sign of an allergic transfusion reaction, which is a hypersensitivity response to the donor blood or its components, such as plasma proteins, antibodies, or preservatives. An allergic transfusion reaction can range from mild to severe, and can be treated with antihistamines, corticosteroids, or epinephrine.

Choice A reason: Leakage of urine is a sign of urinary retention, as it indicates that the bladder is overdistended and unable to empty completely. The urine may leak around the urethra or through a catheter.

Choice B reason: Dark-colored urine is not a sign of urinary retention. It can be caused by dehydration, certain foods or medications, or liver or kidney problems.

Choice C reason: Cloudy urine is not a sign of urinary retention. It can be caused by infection, inflammation, or stones in the urinary tract.

Choice D reason: Blood in urine is not a sign of urinary retention. It can be caused by trauma, infection, cancer, or coagulation disorders in the urinary tract.