Comparison of Actual Performance in the Flow and Fraction of Inspired O₂ among Different High-Flow Nasal Cannula Devices: A Bench Study

Table 4

Characteristics of the flow change rate in five devices.

Devices	Flow change rate (%)
	≤35 L/min	40–60 L/min	>60 L/min
TNI softFlow 50	0 (−0.3, 0)	0 (0, 0.2)	N/A
Bellavista 1000	3.9 (3.6, 4.1)	5.4 (5, 7.9)	28.2 (22.6, 31.9)
HUMID-BH	6.9 (4.2, 10.2)	4.3 (3.2, 7.5)	30.6 (23.8, 38)
OH-70C	5.8 (4.1, 8.6)	14.4 (6.3, 26.9)	39.3 (37.7, 42.3)
AIRVO 2	8.3 (7.1, 9.9)	31.4 (23.3, 38.3)	N/A

The data are presented as the median (IQR). The flow change rate refers to the change in flow after one side of the cannulas is clipped.