What defines an air embolism during dialysis?

An air embolism during dialysis is characterized by the presence of air bubbles that become trapped in a vessel. This condition can occur when air enters the bloodstream, potentially leading to serious complications such as obstruction of blood flow, tissue ischemia, or even stroke. When air bubbles accumulate, they can obstruct smaller blood vessels, resulting in impaired circulation to the affected tissues.

In the context of dialysis, it is crucial to monitor for any signs of air getting into the dialysis circuit, as this can compromise patient safety. Therefore, option B accurately captures the critical aspect of what constitutes an air embolism in this setting. Understanding this definition is key for dialysis staff in implementing preventive measures and recognizing early signs to ensure patient safety during treatment.