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  2. Chronic obstructive pulmonary disease - Wikipedia

    en.wikipedia.org/wiki/Chronic_obstructive...

    Chronic obstructive pulmonary disease (COPD) is a type of progressive lung disease characterized by chronic respiratory symptoms and airflow limitation. [8] GOLD 2024 defined COPD as a heterogeneous lung condition characterized by chronic respiratory symptoms (dyspnea or shortness of breath, cough, sputum production and/or exacerbations) due to abnormalities of the airways (bronchitis ...

  3. Effect of oxygen on chronic obstructive pulmonary disease

    en.wikipedia.org/wiki/Effect_of_oxygen_on...

    Signs and symptoms. In individuals with chronic obstructive pulmonary disease and similar lung problems, the clinical features of oxygen toxicity are due to high carbon dioxide content in the blood (hypercapnia). [1] This leads to drowsiness (narcosis), deranged acid-base balance due to respiratory acidosis, and death.

  4. Davenport diagram - Wikipedia

    en.wikipedia.org/wiki/Davenport_diagram

    Davenport diagram. In acid base physiology, the Davenport diagram is a graphical tool, developed by Horace W. Davenport, that allows a clinician or investigator to describe blood bicarbonate concentrations and blood pH following a respiratory and/or metabolic acid-base disturbance. The diagram depicts a three-dimensional surface describing all ...

  5. Respiratory failure - Wikipedia

    en.wikipedia.org/wiki/Respiratory_failure

    Respiratory failure is classified as either Type 1 or Type 2, based on whether there is a high carbon dioxide level, and can be acute or chronic. In clinical trials, the definition of respiratory failure usually includes increased respiratory rate , abnormal blood gases (hypoxemia, hypercapnia, or both), and evidence of increased work of breathing.

  6. Acute exacerbation of chronic obstructive pulmonary disease

    en.wikipedia.org/wiki/Acute_exacerbation_of...

    An early morning sample is preferred. [7] E-nose showed the ability to smell the cause of the exacerbation. [8] The definition of a COPD exacerbation is commonly described as "lost in translation", [9] meaning that there is no universally accepted standard with regard to defining an acute exacerbation of COPD. Many organizations consider it a ...

  7. Alveolar–arterial gradient - Wikipedia

    en.wikipedia.org/wiki/Alveolar–arterial_gradient

    CSF alb = 30. CSF glu = 60. CSF/S alb = 7.5. CSF/S glu = 0.6. The Alveolar–arterial gradient (A- aO. 2, [1] or A–a gradient), is a measure of the difference between the alveolar concentration (A) of oxygen and the arterial (a) concentration of oxygen. It is a useful parameter for narrowing the differential diagnosis of hypoxemia.

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