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: Stripping the client's chest tube every 2 hours is not a recommended action, as it can cause excessive negative pressure, tissue trauma, and pain. The nurse should only strip the chest tube if there is a clot or obstruction in the tubing, and only with the provider's order.

Choice B reason: Looping the tubing of the chest tube on the client's bed is a correct action, as it prevents kinking, tension, or pulling on the chest tube. The nurse should also secure the tubing to the bed sheet with a safety pin.

Choice C reason: Placing the chest tube drainage system above the level of the client's heart is not a correct action, as it can cause the fluid to flow back into the chest cavity and impair lung expansion. The nurse should place the chest tube drainage system below the level of the client's chest.

Choice D reason: Taping the connections on the client's chest tube is a correct action, as it prevents air leaks, disconnections, or accidental removal of the chest tube. The nurse should also check the connections regularly for tightness and patency.

Choice A reason: Metabolic alkalosis is a condition in which the blood pH is elevated due to an excess of bicarbonate or a loss of acid. It can be caused by vomiting, diuretics, or excessive antacid intake. It is not associated with COPD.

Choice B reason: Respiratory acidosis is a condition in which the blood pH is lowered due to an accumulation of carbon dioxide. It can be caused by hypoventilation, airway obstruction, or lung diseases such as COPD. It is the most common acid-base imbalance in COPD patients.

Choice C reason: Respiratory alkalosis is a condition in which the blood pH is elevated due to a loss of carbon dioxide. It can be caused by hyperventilation, anxiety, fever, or aspirin overdose. It is not common in COPD patients.

Choice D reason: Metabolic acidosis is a condition in which the blood pH is lowered due to an excess of acid or a loss of bicarbonate. It can be caused by diabetic ketoacidosis, renal failure, or lactic acidosis. It is not directly related to COPD.