🧪A pH of 7.22 indicates acidemia (normal: 7.35–7.45), and a PaCO₂ of 68 mm Hg (normal: 35–45 mm Hg) indicates hypercapnia, meaning CO₂ retention is the cause of the acidosis.

💨This suggests that the primary issue is respiratory, as CO₂ buildup from hypoventilation (respiratory rate of 7/min) is leading to respiratory acidosis.

🧫The bicarbonate level of 28 mEq/L (normal: 22–26) is slightly elevated, showing renal compensation is trying to buffer the acid, but it’s not enough to normalize the pH.

🧠Metabolic acidosis would present with a low pH and low bicarbonate, not high PaCO₂.

🎈Respiratory alkalosis would involve a high pH and low PaCO₂ (e.g., from hyperventilation), which is the opposite of this case.

🧂Metabolic alkalosis would show elevated pH and bicarbonate, not acidosis.

📌Core Message

A low pH with elevated PaCO₂ and hypoventilation points to respiratory acidosis as the primary disturbance.