A 61-year-old female patient with a history of COPD was admitted to the emergency department for an acute case suspected pneumonia. Her ABG results are as follows:

A 61-year-old female patient with a history of COPD was admitted to the emergency department for an acute case suspected pneumonia. Her ABG results are as follows:

pH = 7.19

PCO2 = 66 torr

HCO3 = 26 mEq/L

PaO2 = 41 torr

P(A-a)O2 = 43 torr

Which of the following best describes the patient’s condition?