A a gradient
A a gradient
A a gradient (pronounced as A-A gradient), also known as the Alveolar-arterial gradient, is a measure used in pulmonology to assess the difference between the alveolar concentration (A) of oxygen and the arterial (a) concentration of oxygen. It is a key concept in the field of respiratory physiology and is often used in the diagnosis and monitoring of respiratory diseases.
Pronunciation
- A a gradient: /ˈeɪ eɪ ˈɡreɪdiənt/
Etymology
The term "A a gradient" is derived from the first letters of the words "Alveolar" and "arterial", referring to the two types of oxygen concentrations being compared. The term "gradient" is used in the context of a difference or change in concentration, in this case, oxygen.
Related Terms
- Alveoli: Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
- Arteries: Blood vessels that carry oxygenated blood from the heart to the rest of the body.
- Hypoxemia: A condition characterized by low levels of oxygen in the blood, often assessed using the A a gradient.
- Hypercapnia: A condition characterized by an excess of carbon dioxide in the bloodstream, often associated with respiratory diseases.
- Pulmonary gas exchange: The process of oxygen and carbon dioxide transfer between the lungs and the bloodstream.
See Also
External links
- Medical encyclopedia article on A a gradient
- Wikipedia's article - A a gradient
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