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What is a blood gas analysis and how is it performed? What is the purpose of this test?
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The blood gas analysis is a low risk test since the sample of blood required is not large. Usually most tests use samples of blood collected from veins. For ABG (arterial blood gases) test,the sample of blood is collected from an artery. Through this test several parameters are measured: partial pressure of CO2, partial pressure of oxygen, the pH levels, oxygen levels and saturation, the content of bicarbonate.
The test is performed in order to examine if there exists a problem of lungs or kidneys, such that: asthma or chronic obstructive pulmonary disease, kidney failures. The test is also performed to check the response to the treatment of lungs diseases, or to identify an uncontrolled diabetes or a severe infection. The test could also pinpoints the troubles of sleeping or drug overdoses.
The collection of blood sample from artery produces more pain than the collection of blood sample from veins, since arteries are protected by nerves and they are located much deeper.
The ABG test itself cannot establish the diagnostic, hence, it is useful when is is accompanied with other tests or examinations. Usually, the ABG test can be relevant when the breathing rate is altered or when the glucose levels high, or in case of a infection, or to monitor the kidneys and lungs of an injured hospitalized patient.
The results of ABG test can indicate several diseases, such that:
- the low levels of bicarbonate and the partial pressure of CO2 and the pH level less than 7.4 could indicate a metabolic acidosis(kidney failure), while the pH level less than 7.4 accompanied by the increased levels of of bicarbonate and the partial pressure of CO2 could indicate the respiratory acidosis (pneumonia or COPD).
- the high levels of bicarbonate and the partial pressure of CO2 and the pH level more than 7.4 could indicate a metabolic alkalosis (low blood potassium), while the pH level more than 7.4 accompanied by the decreased levels of of bicarbonate and the partial pressure of CO2 could indicate the respiratory alkalosis (pain, anxiety).
Posted by sciencesolve on March 9, 2014 at 4:59 PM (Answer #1)
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