Alveolar–arterial gradient

（重定向自Alveolar arterial gradient）

The Alveolar–arterial gradient (A-aO₂, 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 used in diagnosing the source of hypoxemia.
It helps to assess the integrity of alveolar capillary unit. For example, in high altitude, the arterial oxygen is low but only because the alveolar oxygen (PAO₂) is also low. However, in states of ventilation perfusion mismatch, such as pulmonary embolism or right-to-left shunt, oxygen is not effectively transferred from the alveoli to the blood which results in elevated A-a gradient

单词	Alveolar arterial gradient
释义	Alveolar arterial gradient 英语百科 Alveolar–arterial gradient （重定向自Alveolar arterial gradient） The Alveolar–arterial gradient (A-aO₂, 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 used in diagnosing the source of hypoxemia. It helps to assess the integrity of alveolar capillary unit. For example, in high altitude, the arterial oxygen is low but only because the alveolar oxygen (PAO₂) is also low. However, in states of ventilation perfusion mismatch, such as pulmonary embolism or right-to-left shunt, oxygen is not effectively transferred from the alveoli to the blood which results in elevated A-a gradient
随便看	open process open profile Open Profiling Standard open programmer open programming interface open promoter complex open propeller efficiency open prospectus open proving equipment Open proxy Open proxy server open pubic arch open pubic fracture open pulmonary tuberculosis open pulpitis open pulverizing system open punctuation open purchase orders open ... purse open quantity Open question Open questions open queuing network open quote open race