eTable 25-2.

Effects of Exercise, Respiratory Maneuvers, and Posture on Arterial Po₂ (mm Hg) During Inhalation of Pure Oxygen

	SITTING ARTERIAL Po2				SUPINE ARTERIAL Po2
Case no.	Rest	Slow Maximal Inspiration	Slow Maximal Expiration	Exercise	Rest	Slow Maximal Inspiration
1*	410	370	512	122
3†	615	620	605	605	490	375
	(105)			(83)
5‡	410	240		480	440
7§	389				487	384
					(58)
9‖	572	395	463	96	520
10¶	426			130	330
	(72)				(62)
11‡	350	120	390	180

Numbers in parentheses indicate arterial Po₂ during inhalation of room air.

^*Patent foramen ovale.

^†Abnormal pleural-pulmonary vessels.

^‡No shunt at cardiac catheterization.

^§No abnormal vessels.

^‖Po₂ 73 mm Hg during exercise while supine breathing pure oxygen.

^¶Orthopnea relieved by breathing oxygen or sitting up.