Figure 2
From: Upper airway flow characteristics of childhood obstructive sleep apnea-hypopnea syndrome
Illustration of experimental validation. (a) is the picture of the 3D printing lab experiment, where 1 is the DC power supply, 2 is the vacuum pump, 3 is the control valve, 4 is the flowmeter, 5 is the pressure transducer, 6 is the impulse tube and 7 is the 3D printing model of the upper airway. (b) Schematic diagram of lab validation by 3D printing.
