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. 2018 Jul 30;2018:bcr2017223514. doi: 10.1136/bcr-2017-223514

Table 1.

Comparison of arterial blood gas analysis in supine and upright positions

Arterial blood gas analysis Supine position Upright position
Arterial oxygen tension 61 mm Hg 53.9 mm Hg
Arterial carbon dioxide tension 29.5 mm Hg 32.6 mm Hg