Arterial and Venous Blood Gas Analysis with Electrolytes (A/V Blood Gas/Electrolytes)

What Does This Test Measure?

Your blood is drawn from both an artery and a vein to check for several critical measurements: oxygen saturation (SaO₂), carbon dioxide levels (PaCO₂), pH balance, and electrolytes like sodium, potassium, chloride, and bicarbonate. These values help determine how well your body is maintaining acid-base balance and oxygen levels, which is vital for patients with kidney disease or those undergoing dialysis.

Why Is This Test Important?

This test is particularly important for patients with an arteriovenous fistula, a surgical connection created between an artery and vein to improve blood flow for dialysis. It helps doctors monitor how well your blood is being processed and whether your body is maintaining stable levels of essential chemicals.

How Is the Test Performed?

Two blood samples are taken: one from an artery (usually in your arm) and one from a vein. The blood is analyzed immediately to measure gas levels and electrolytes. The results help healthcare providers assess your blood chemistry and adjust treatments as needed.

What Are Common Findings?

Common findings may include abnormal levels of oxygen, carbon dioxide, or electrolytes, which can indicate issues like respiratory problems, kidney dysfunction, or fluid imbalances. For example, low oxygen levels might suggest breathing difficulties, while high or low bicarbonate levels could point to metabolic imbalances.