Which of the following statements about venous air embolism is true?

The statement regarding venous air embolism that accurately reflects the condition is that air may enter circulation by allowing the IV to run dry. This situation occurs when the infusion line ends up empty or not adequately filled with fluid, leading to negative pressure that can draw air into the bloodstream. This is particularly concerning in intravenous therapy, as small amounts of air can lead to significant complications.

When the intravenous line is not continuously supplied with fluid, the risk of air being introduced into the venous system increases, which can disrupt blood flow and potentially lead to serious health issues, including obstruction in blood vessels.

In contrast to this, the other options present misconceptions about venous air embolism. It's important to recognize that air embolisms can occur in various situations, not just during central line placements, and their symptoms typically include respiratory distress and cardiovascular changes rather than fever and chills. Furthermore, a venous air embolism is not harmless; it can have serious consequences depending on the volume of air that enters the circulation and the specific context of the patient's health.