High flow nasal cannula oxygen and non-invasive mechanical ventilation in management of COVID-19 patients with acute respiratory failure: a retrospective observational study

The Egyptian Journal of Bronchology

Table 3 Vital signs and blood gas analysis of the study population before treatment

	All patients (n=63)	HFNCO (n=37)	NIV (n=26)	P^#
Heart rate (beats/minute)	95.34 ± 6,67	95.10 ± 6.08	95.96 ± 7.40	0.36
Respiratory rate (breaths/minute)	28.17 ± 3.62	27.70 ± 3.11	28.88 ± 4.14	0.10
Mean arterial blood pressure (mmHg)	91.60 ± 4.52	91.02 ± 4.40	92.42 ± 4.55	0.11
PH	7.42 ± 0.03	7.43 ± 0.04	7.42 ± 0.03	0.10
PaCO2 (mmHg)	34.82 ± 3.77	34.67 ± 3.69	35.03 ± 3.99	0.35
PaO2/FiO2	190.79 ± 39.81	191.08 ± 37.83	190.38 ± 42.47	0.47

HFNCO high flow nasal cannula oxygen, NIV non-invasive ventilation, PaCO2 arterial pressure of carbon dioxide, PaO2 arterial pressure of oxygen, FiO2 fraction of inspired oxygen
^#P for comparison between HFNCO and NIV, significance at P<0.05