The radial artery on the wrist is most commonly used to obtain the sample. However, the femoral artery and brachial artery can be used if necessary. If the patient already has a pre-existing arterial line, this can be used to obtain the sample.
What is the preferred artery for ABG collection?
The first choice is the radial artery, which is located on the thumb side of the wrist; because of its small size, use of this artery requires extensive skill in arterial blood sampling.
Why is the radial artery used for ABG?
“Because radial artery puncture is relatively safe and the site easily accessible as well as convenient for checking collateral circulation, this site is preferable.”2 If collateral circulation is absent, the radial artery should never be used.
Which arterial blood gas is most important?
Oxygen (O2) and carbon dioxide (CO2) are the most important respiratory gases, and their partial pressures in arterial blood reflect the overall adequacy of gas exchange. Pao2 is affected by age and altitude.
Why arteries are the best site for blood gas analysis?
A blood gas analysis requires arterial blood because the gases and pH levels in the arteries different from venous blood (blood from a vein). Arteries carry oxygen throughout the body.
Why is ABG better than VBG?
ABGs can be more difficult to obtain, are more painful and require arterial puncture that risks complications. A peripheral venous blood gas (VBG) can be obtained as the nurse obtains IV access upon patient arrival, requiring no additional sticks or risk of arterial injury.
Can you use ulnar artery for ABG?
Blood is then allowed to flow through the artery that will not be used to collect the blood sample. This is usually the ulnar artery, which is found on the outer (little finger side) of your wrist. Arterial blood gases are usually taken from the radial artery, which is found on the inner (thumb side) of the wrist.
How do you find the radial artery for ABG?
Palpate the radial artery over the wrist of the patient’s non-dominant hand to identify an ideal puncture site. You should use the tips of your fingers to clearly map out the course of the radial artery and then identify a distal site where the artery is most pulsatile.
When do you draw ABGS?
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).
Who can draw ABGS?
Most ABG samples can be drawn by a respiratory technician or specially trained nurse. Collection from the femoral artery, however, is usually performed by a doctor. Before attempting a radial puncture, you should perform Allen’s test. (See Performing Allen’s test, page 36.)
Which artery has the best collateral circulation?
Carotid Artery Disease
The most important source of collateral circulation for a hemisphere comes from the contralateral ICA via the circle of Willis.
Which artery is typically the easiest to access?
SUMMARY: Although the common femoral artery is the easiest and most widely accepted access site for cerebral angiography, atherosclerotic, aortoiliac, or femoral artery disease can preclude this approach.
What are normal ABGS?
According to the National Institute of Health, typical normal values are: pH: 7.35-7.45. Partial pressure of oxygen (PaO2): 75 to 100 mmHg. Partial pressure of carbon dioxide (PaCO2): 35-45 mmHg.
How is ABG test performed?
An arterial blood gases (ABG) test is a blood test. It measures the acid-base balance (pH) and the levels of oxygen and carbon dioxide in the blood. It uses blood drawn from an artery. This is where the levels of oxygen and carbon dioxide can be measured before they enter body tissues.
What if ABG is low?
If a PaO2 level is lower than 80 mmHg, it means that a person is not getting enough oxygen . A low PaO2 level can point to an underlying health condition, such as: emphysema. chronic obstructive pulmonary disease, or COPD.