Helmet-based noninvasive ventilation for acute exacerbation of chronic obstructive pulmonary disease: A case report

Table 1 Physiological parameters during helmet-based noninvasive ventilation

Parameters		0 h	3 h	5 h	15 h	40 h	63 h
Heart rate (bpm)		60	96	94	72	68	77
Respiratory rate (bpm)		19	36	32	30	17	19
Blood pressure (mmHg)		74/47	166/85	159/80	91/57	99/59	115/69
ABG	pH	7.19	7.14	7.18	7.25	7.33	7.36
	PaCO2 (mmHg)	77.6	75.2	73..3	65.3	55.3	49.2
	PaO2 (mmHg)	70.2	75.8	69.7	82.3	80.2	78.2
NIV mode	FiO2	0.4	0.4	0.4	0.4	0.4	0.4
	PEEP	8	10	10	10	10	10
	PS	10	12	12	12	12	12

ER: Emergency room; ABG: Arterial blood gas; PaO₂: Arterial oxygen partial pressure; PaCO₂: Partial arterial carbon dioxide; NIV: Noninvasive ventilation; FiO₂: Fraction of inspired oxygen; PEEP: Positive end-expiratory pressure; PS: Pressure support.