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  2. Pulmonary function testing - Wikipedia

    en.wikipedia.org/wiki/Pulmonary_function_testing

    Pulmonary function testing (PFT) is a complete evaluation of the respiratory system including patient history, physical examinations, and tests of pulmonary function. The primary purpose of pulmonary function testing is to identify the severity of pulmonary impairment. [ 1 ]

  3. Diffusing capacity - Wikipedia

    en.wikipedia.org/wiki/Diffusing_capacity

    Diffusing capacity of the lung (D L) (also known as transfer factor) measures the transfer of gas from air in the lung, to the red blood cells in lung blood vessels. It is part of a comprehensive series of pulmonary function tests to determine the overall ability of the lung to transport gas into and out of the blood.

  4. Impulse oscillometry - Wikipedia

    en.wikipedia.org/wiki/Impulse_oscillometry

    Impulse oscillometry (IOS), also known as respiratory oscillometry, forced oscillatory technique (FOT), or just oscillometry, is a non-invasive lung function test that measures the mechanical properties of the respiratory system, particularly the upper and intrathoracic airways, lung tissue and chest wall, usually during the patient's tidal breathing (the way someone breathes when they are ...

  5. Arterial blood gas test - Wikipedia

    en.wikipedia.org/wiki/Arterial_blood_gas_test

    Interpretation pH 7.34–7.44 [13] The pH or H + indicates if a person is acidemic (pH < 7.35; H + >45) or alkalemic (pH > 7.45; H + < 35). H + 35–45 nmol/L (nM) Arterial oxygen partial pressure (P a O 2) 10–13 kPa 75–100 mmHg [13] A low PaO 2 indicates abnormal oxygenation of blood and a person is known as having hypoxemia.

  6. Diffusing capacity for carbon monoxide - Wikipedia

    en.wikipedia.org/wiki/Diffusing_capacity_for...

    This test involves measuring the partial pressure difference between inspired and expired carbon monoxide. It relies on the strong affinity and large absorption capacity of red blood cells for carbon monoxide and thus demonstrates gas uptake by the capillaries that are less dependent on cardiac output. [3]

  7. Nitrogen washout - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_washout

    A nitrogen washout can be performed with a single nitrogen breath, or multiple ones. Both tests use similar tools, both can estimate functional residual capacity and the degree of nonuniformity of gas distribution in the lungs, but the multiple-breath test more accurately measures absolute lung volumes. [1]

  8. Plethysmograph - Wikipedia

    en.wikipedia.org/wiki/Plethysmograph

    A man undergoing whole body plethysmography. A modern body plethysmograph using ultrasound. A plethysmograph is an instrument for measuring changes in volume within an organ or whole body (usually resulting from fluctuations in the amount of blood or air it contains).

  9. Allen's test - Wikipedia

    en.wikipedia.org/wiki/Allen's_test

    In medicine, Allen's test or the Allen test is a medical sign used in physical examination of arterial blood flow to the hands. It was named for Edgar Van Nuys Allen, who described the original version of the test in 1942.