ABG Interpretation in COPD Exacerbation

A nurse is evaluating the laboratory results of a patient who has recently experienced an exacerbation of chronic obstructive pulmonary disease (COPD).

The nurse notes the arterial blood gas (ABG) values and recalls that normal values are critical for assessing the patient's respiratory status. In this case, the nurse observes a pH of 7.28, partial pressure of carbon dioxide (pCO₂) of 58 mmHg, and partial pressure of oxygen (pO₂) of 60 mmHg.

Based on these ABG results, which of the following conditions should the nurse suspect?