A 70-year-old man on ICU with community-acquired pneumonia and septic shock has the following ABG on FiO2 0.4, PEEP 8: pH 7.48, PaO2 10.5 kPa, PaCO2 3...

Question

A 70-year-old man on ICU with community-acquired pneumonia and septic shock has the following ABG on FiO2 0.4, PEEP 8: pH 7.48, PaO2 10.5 kPa, PaCO2 3.0 kPa, HCO3 18 mmol/L, BE -4, lactate 5.5 mmol/L. What is the acid-base interpretation?

Accepted Answer

Mixed respiratory alkalosis and metabolic acidosis (lactic acidosis)

Answer

Compensated metabolic acidosis

Answer

Pure respiratory alkalosis

Answer

Normal ABG

Answer

Metabolic alkalosis with respiratory compensation

uk-fficm MCQ (SBA): Mixed Acid-Base Disorder

A 70-year-old man on ICU with community-acquired pneumonia and septic shock has the following ABG on FiO2 0.4, PEEP 8: pH 7.48, PaO2 10.5 kPa, PaCO2 3.0 kPa, HCO3 18 mmol/L, BE -4, lactate 5.5 mmol/L. What is the acid-base interpretation?