What medical procedure involves suctioning fluid or air from a cavity?

The term that accurately describes the medical procedure involving the suctioning of fluid or air from a cavity is "aspirate." In a clinical setting, aspiration can be performed for various reasons, including the relief of pressure in a body cavity, the removal of pus or fluid accumulation, or for diagnostic purposes, such as extracting fluid for lab analysis. This technique is crucial in managing conditions like pleural effusion, abscesses, or respiratory distress where fluid or air may hinder normal bodily functions.

Infusion refers to the introduction of a fluid, often medication or nutrients, directly into a patient's bloodstream or tissues, which contrasts with the removal process of aspiration. Excision pertains to the surgical removal of tissue or organs and does not involve suctioning. Transfusion specifically refers to transferring blood or blood products from one person to another, which is unrelated to the removal of fluid or air.