Research Article
Comparison of Actual Performance in the Flow and Fraction of Inspired O2 among Different High-Flow Nasal Cannula Devices: A Bench Study
Table 3
Characteristics of the actual-flow in five devices.
| | Devices | Flow deviation (L/min) | Effect of set-FiO2 | | ≤40 L/min | 45–60 L/min | >60 L/min |
| | AIRVO 2 | −0.2 (−0.8, 0.3) | −0.9 (−3.6, 0.1) | N/A | No effect at 20 and 25 L/min; effect increase at higher set-flows | | Bellavista 1000 | −0.7 ± 0.848 | −1.4 (−2.2, −0.3) | 0.6 (−0.1, 2.2) | No specific pattern | | TNI softFlow 50 | 1.3 (0.8, 2.3) | 1.2 (0.8, 2) | N/A | Effect increase at higher set-flows; more obviously than in AIRVO 2 | | HUMID-BH | −1.6 (−2.4, −0.9) | −2.7 (−6.7, −1.6) | −3.6 (−6.6, −0.8) | No specific pattern | | OH–70C | 4.4 (3.9, 5.2) | 5.7 (5.1, 7.1) | 5.7 (5, 6.8) | No specific pattern |
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The data are presented as the median (IQR) and mean ± SD. The flow deviation equals the actual-flow minus the corresponding set-flow.
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