High-Flow Nasal Cannula: A Promising Oxygen Therapy for Patients with Severe Bronchial Asthma Complicated with Respiratory Failure

Table 3

Effects of HFNC and COT on PO₂ and PCO₂ in severe asthma exacerbation patients combined with respiratory failure.

Group	Oxygen therapy	PO2	PCO2
HFNC group	Pretreatment	54.45 ± 6.86	51.20 ± 8.75
	Posttreatment	94.73 ± 4.43	40.22 ± 4.37
COT group	Pretreatment	52.68 ± 8.42	48.71 ± 3.32
	Posttreatment	86.98 ± 6.42	39.87 ± 4.35