A 53yo man with prv hx of COPD presents with breathlessness and purulent sputum

A 53yo man with prv hx of COPD presents with breathlessness and purulent sputum. O2 stat=85%
on air. ABG: PaO2=7.6, PaCOS=7. What is the appropriate management for his condition?

a. 24% oxygen
b. Mechanical ventilation
c. 100% oxygen
d. Nebulized salbutamol

Ans. The key is A. 24% oxygen. [Patient has hypoxemia and hypercapnea (type2 respiratory failure). Hence he should be put on 24% oxygen. 100% oxygen will abolish hypoxic drive and worsen hypercapnea].