Table 3.

Gas mixture property values at 1 atm and 37°C

Gas	Viscosity (× 105 kg/(s·m))	Density (kg/m3)
Medical air (N2 78%/O2 22%)	1.876	1.135
Heliox (He 70%/O2 30%)	2.264	0.487
Nitrous oxide (N2O 50%/O2 50%)	1.659	1.404
Argon (Ar 50%/O2 50%)	2.152	1.414
Xenon (Xe 70%/O2 30%)	2.397	3.989

Note: 1 atm = 101.325 kPa.