Table 1: Abnormal acid-base patterns
pH pCO2 [HCO3-]   Diagnosis  
  acute or chronic respiratory acidosis
  acute or chronic metabolic acidosis
  acute or chronic respiratory alkalosis
  acute or chronic metabolic alkalosis
  mixed metabolic acidosis and respiratory acidosis
  mixed metabolic alkalosis and respiratory alkalosis
N   Equipotent metabolic alkalosis and respiratory acidosis
N   Equipotent metabolic acidosis and respiratory alkalosis
N N N   Equipotent metabolic acidosis and metabolic alkalosis or normal