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. 2023 Nov 20;23:449. doi: 10.1186/s12890-023-02752-6

Table 7.

The actual measured flow rate of devices

Pre-set flow rate(L/min) HFT-300 H-80 M Difference in actual output flow rate
10 8.69 ± 0.49 11.21 ± 0.78* 2.53 ± 0.85
20 18.06 ± 1.49 21.65 ± 0.65* 4.03 ± 1.24
30 26.47 ± 0.77 32.52 ± 0.59* 6.23 ± 0.51
40 35.26 ± 2.18 43.85 ± 2.08* 9.26 ± 1.85
50 43.99 ± 2.22 53.10 ± 1.31* 9.10 ± 2.43
60 51.68 ± 0.99 62.71 ± 1.49* 11.07 ± 1.84

Value is the mean ± SD, * represents P < 0.01 compared to HFT-300, output flow difference = output flow (H-80 M) - output flow (HFT-300)