Quick Answer: What will the results of an arterial blood gas ABG test tell you about your patient?

An arterial blood gases (ABG) test measures the acidity (pH) and the levels of oxygen and carbon dioxide in the blood from an artery. This test is used to find out how well your lungs are able to move oxygen into the blood and remove carbon dioxide from the blood.

What did the analysis of the patient’s arterial blood gases reveal?

An ABG is a blood test that measures the acidity, or pH, and the levels of oxygen (O2) and carbon dioxide (CO2) from an artery. ² The test is used to check the function of the patient’s lungs and how well they are able to move oxygen into the blood and remove carbon dioxide.

What is an ABG why or when is it usually performed?

An arterial blood gas test, commonly known as an ABG, is performed on blood that is drawn from an artery. It is used to see how well the lungs are functioning and to determine the effectiveness of respiratory therapies, such as the use of a ventilator, CPAP, BiPAP, or oxygen.

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What is ABG test normal range?

An acceptable normal range of ABG values of ABG components are the following,[6][7] noting that the range of normal values may vary among laboratories and in different age groups from neonates to geriatrics: pH (7.35-7.45) PaO2 (75-100 mmHg) PaCO2 (35-45 mmHg)

How do you read blood gas results?

If the ABG results reveal pH numbers are not within the normal range, the patient’s pH level is either acidotic or alkalotic. The lower the number, the more acidotic the patient is. For instance, a pH of 3 is severely acidotic and requires emergency intervention. Alkalosis is the opposite.

How do you know if ABG is venous or arterial?

As discussed earlier, a VBG gives you the same information as an ABG. However, this information is going to be different since it’s obtained from the venous as opposed to the arterial side. The most obvious difference will be in PO2 which, of course, will be markedly lower in the venous side than in the arterial side.

How do you know if its acidosis or alkalosis?

Examine the pH level.

Below-normal pH levels (less than 7.35) indicate acidosis, and higher-than-normal pH levels (more than 7.45) indicate alkalosis.

Why would an ABG be ordered?

An arterial blood gases (ABG) test is done to: Check for severe breathing problems and lung diseases, such as asthma, cystic fibrosis, or chronic obstructive pulmonary disease (COPD). See how well treatment for lung diseases is working. Find out if you need extra oxygen or help with breathing (mechanical ventilation).

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What can cause false ABG results?

Sources of error due to inappropriate sample collection and handling

  • Sample contaminated with bubbles. …
  • Sample contaminated with venous blood.
  • Sample clotted.
  • Sample contains too much heparin (liquid heparin dilutes the sample, and causes pH changes)
  • Haemolysis en route to the ABG analyser.


How painful is an ABG?

Most people feel a brief, sharp pain as the needle to collect the blood sample enters the artery. If you get a local anesthetic, you may feel nothing at all from the needle puncture. Or you may feel a brief sting or pinch as the needle goes through the skin.

What is normal pO2 on ABG?

ABG (Arterial Blood Gas)

pH 7.35–7.45
pCO2 35–45 torr 4.5–6.0 kPa
pO2 >79 torr >10.5 kPa
CO2 23-30 mmol/L
Base excess/deficit ± 3 mEq/L ± 2 mmol/L

When pCO2 is high?

The pCO2 gives an indication of the respiratory component of the blood gas results. A high and low value indicates hypercapnea (hypoventilation) and hypocapnea (hyperventilation), respectively. A high pCO2 is compatible with a respiratory acidosis and a low pCO2 with a respiratory alkalosis.

What is normal pCO2 level?

Generally, under normal physiologic conditions, the value of PCO2 ranges between 35 to 45 mmHg, or 4.7 to 6.0 kPa. Typically the measurement of PCO2 is performed via an arterial blood gas; however, there are other methods such as peripheral venous, central venous, or mixed venous sampling.

What do blood gas results mean?

A blood gas test measures the amount of oxygen and carbon dioxide in the blood. It may also be used to determine the pH of the blood, or how acidic it is. The test is commonly known as a blood gas analysis or arterial blood gas (ABG) test. Your red blood cells transport oxygen and carbon dioxide throughout your body.

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How do you fix metabolic acidosis?

Treatment for metabolic acidosis works in three main ways: excreting or getting rid of excess acids. buffering acids with a base to balance blood acidity. preventing the body from making too many acids.

Metabolic compensation

  1. insulin.
  2. diabetes medications.
  3. fluids.
  4. electrolytes (sodium, chloride, potassium)


What causes respiratory acidosis?

Respiratory acidosis involves a decrease in respiratory rate and/or volume (hypoventilation). Common causes include impaired respiratory drive (eg, due to toxins, CNS disease), and airflow obstruction (eg, due to asthma, COPD [chronic obstructive pulmonary disease], sleep apnea, airway edema).

Cardiac cycle