A nurse is assisting with the care of a client who has chronic obstructive pulmonary disease (COPD) and is short of breath. When reviewing the client's arterial blood gases (ABGs), which of the following conditions should the nurse anticipate the client to be experiencing?

A. Respiratory acidosis is caused by hypoventilation, leading to an increase in carbon dioxide levels in the blood. This condition is characterized by confusion, drowsiness, and headache, but it does not typically present with vomiting, tingling, or slow respirations as described in this scenario.
B. Metabolic alkalosis occurs due to a loss of hydrogen ions or an excess of bicarbonate, commonly caused by prolonged vomiting. The symptoms described, including persistent vomiting, tingling, and slow, shallow respirations, are consistent with metabolic alkalosis.
C. Metabolic acidosis results from the accumulation of acid or loss of bicarbonate, often presenting with rapid, deep breathing (Kussmaul respirations). The client’s slow respirations and other symptoms do not align with metabolic acidosis, making this option less likely.
D. Respiratory alkalosis is caused by hyperventilation, which leads to a decrease in carbon dioxide levels. It is usually associated with rapid breathing and does not match the slow respirations and other symptoms seen in this client.

A. Impaired carbon dioxide elimination due to shunting: Shunting in ARDS affects oxygenation rather than carbon dioxide elimination. ARDS primarily results in impaired gas exchange due to inflammation and fluid accumulation in the alveoli, affecting oxygen rather than CO2.

B. Decreased pulmonary arterial pressure due to ventilation-perfusion (V/Q) mismatch: ARDS typically leads to increased pulmonary arterial pressure due to inflammation and decreased lung compliance. The V/Q mismatch contributes to impaired gas exchange, often resulting in elevated pulmonary arterial pressure rather than decreased.

C. Hypoxemia due to dead space: In ARDS, hypoxemia is primarily due to impaired gas exchange from damaged alveoli, not due to dead space. Dead space refers to areas where ventilation occurs without adequate blood flow, which is not the main issue in ARDS.

D. Decreased pulmonary compliance due to stiffness: ARDS is characterized by decreased pulmonary compliance due to the stiffness of the lung tissue caused by inflammation and edema. This decreased compliance makes lung expansion more difficult, which is a central feature of ARDS.