Which of the following best describes gaseous microemboli?

Gaseous microemboli refer specifically to tiny air bubbles that can enter the bloodstream and travel within the circulatory system. These bubbles can arise during various medical procedures, particularly in contexts such as cardiac surgery or during the use of certain medical devices. When present in the vascular system, they can lead to significant complications including obstructed blood flow and subsequent ischemic events in tissues.

The term emphasizes that these are not just any particles, but specifically air bubbles, differentiating them from other types of emboli such as thrombi (blood clots) or debris from tissues and cells. Understanding the composition and behavior of gaseous microemboli is crucial for perfusionists, as it directly impacts patient safety and outcomes during surgical procedures that involve cardiopulmonary bypass or similar interventions.