Table 1.

Flowrates and surface areas of specific segments of the airway replica.

Segment ID	Flow rate (L/min)		Airway generation	Surface area (cm2)
0	30	60	Nasal cavity	144.1
1			Oral cavity	146.2
2	30	60	G0 - trachea	60.2
3	30	60	G1	9.7
4	8.9	17.8	G1	9.2
5	8.9	17.8	G2	3.6
6	5.6	11.2	G3	5.7
7	3.3	6.6	G3	4.0
8	21.1	42.2	G2	8.6
9	6.9	13.8	G3	6.0
10	14.3	28.6	G3	4.9
11	6.7	13.4	G4	6.1
12	7.6	15.2	G4	4.1
13	1.4	2.8	G4–G6	10.1
14	1.6	3.2	G4–G6	16.1
15	4.0	8	G4–G7	25.2
16	1.9	3.8	G4–G6	10.7
17	3.6	7.2	G5–G6	14.4
18	4.7	9.4	G5–G7	17.7
19	3.8	7.6	G4–G6	21.9
20	3.1	6.2	G4–G6	5.9
21	3.1	6.2	G4–G6	21.0
22	3.0	6	G5–G6	10.6
Total inspiratory flow rate (L/min)	30	60