From: Acid–base balance, serum electrolytes and need for non-invasive ventilation in patients with hypercapnic acute exacerbation of chronic obstructive pulmonary disease admitted to an internal medicine ward
Mixed respiratory acidosis – metabolic alkalosis (N = 36)
Compensated respiratory acidosis (N = 51)
Mixed respiratory - metabolic acidosis (N = 23)
NIV -
75 % (27)
53 % (27)
4 % (1)
NIV +
25 % (9)
47 % (24)
96 % (22)