. Author manuscript; available in PMC: 2012 Apr 1.

Published in final edited form as: Concepts Magn Reson Part B Magn Reson Eng. 2011 Apr;39B(2):78–88. doi: 10.1002/cmr.b.20192

TABLE 1.

Size of restrictors, supply pressure and ventilation parameters for mice and rats. The restrictors are chosen so that the desired tidal volume is delivered when the supply pressure exceeds a few psig. The inner-diameter of the inhale and exhale lines is 1/32 in for mice, and 1/16 in for rats.

	Mouse					Rat
	Orifice Diameter (mm)	Supply Pressure (psig)	Inhalation Duration (ms)	breathing rate (min⁻¹)	Tidal Volume (ml)	Orifice Diameter (mm)	Supply Pressure (psig)	Inhalation Duration (ms)	breathing rate (min⁻¹)	Tidal Volume (ml)
O₂	0.02	2.0	150	100	0.05	0.13	6.0	250	60	1.0
N₂	0.04	3.0			0.20	0.24	5.0			3.0
³He	0.04	3.5			0.20	0.22	4.0			3.0
¹²⁹Xe	0.07	4.5			0.20	0.26	3.5			3.0