What To Expect Before Lung Function Tests
If you take breathing medicines, your doctor may ask you
to stop them for a short time before spirometry, a lung
volume measurement test, or a lung diffusion capacity test.
No special preparation is needed before pulse oximetry
and arterial blood gas tests. If you're being treated with
oxygen, your doctor may ask you to stop using it for a
short time before the tests. This is done to check your blood
oxygen level without the added oxygen.
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