TABLE 4.

The influence of 30 s oscillations of 80/20 and 30/70 O₂/N₂ concentrations on lung diffusion measures.

Testing period	Mean	SD	p-value
Membrane diffusion capacity (ml/min/mmHg)
Pre	43.09	8.27
Mid	42.31	9.13	0.81
Post	43.29	8.19	0.99
Recovery	43.57	9.93	0.99
Pulmonary-capillary blood volume (ml)
Pre	107.58	25.34
Mid	100.49	14.98	0.34
Post	94.30	17.86	0.03
Recovery	97.47	18.82	0.11
Dm/Vc (1/min/mmHg)
Pre	0.41	0.08
Mid	0.45	0.08	0.99
Post	0.49	0.10	0.29
Recovery	0.48	0.12	0.43
Cardiac output (L/min)
Pre	5.48	1.02
Mid	5.16	0.98	0.34
Post	4.88	0.83	0.03
Recovery	5.01	0.97	0.10

SD, standard deviation. Bolded p-values denote a significant difference between that testing period and the pre exposure testing period (p < 0.05).