The artery of choice for ABG collection.

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Multiple Choice

The artery of choice for ABG collection.

When collecting an arterial blood gas, you want a site that gives a reliable sample with the least risk to the patient. The radial artery at the wrist is the preferred choice because it lies close to the surface, making it easy to locate and puncture, and it usually provides a stable pulse that helps with a clean draw. It also tends to have a straightforward hemostasis after the procedure and a lower risk of complications compared with deeper or less accessible arteries. Before proceeding, an Allen test (or a similar assessment) is commonly done to confirm that the hand will still receive adequate blood flow from the ulnar artery if the radial artery is compromised, ensuring safety. The ulnar artery can be used as an alternative if the radial site isn’t available or is unsuitable, but it is not the standard first choice because it can be harder to access consistently in some patients and the collateral flow to the hand can be less predictable. The brachial and femoral sites are generally avoided when possible due to higher complication risks, such as nerve injury, hematoma, infection, and patient discomfort.

When collecting an arterial blood gas, you want a site that gives a reliable sample with the least risk to the patient. The radial artery at the wrist is the preferred choice because it lies close to the surface, making it easy to locate and puncture, and it usually provides a stable pulse that helps with a clean draw. It also tends to have a straightforward hemostasis after the procedure and a lower risk of complications compared with deeper or less accessible arteries. Before proceeding, an Allen test (or a similar assessment) is commonly done to confirm that the hand will still receive adequate blood flow from the ulnar artery if the radial artery is compromised, ensuring safety.

The ulnar artery can be used as an alternative if the radial site isn’t available or is unsuitable, but it is not the standard first choice because it can be harder to access consistently in some patients and the collateral flow to the hand can be less predictable. The brachial and femoral sites are generally avoided when possible due to higher complication risks, such as nerve injury, hematoma, infection, and patient discomfort.

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