What is the primary purpose of a stent?

The primary purpose of a stent is to act as a conduit that holds a vessel or tubular structure open. Stents are often used in the context of interventional radiology and cardiology to prevent the re-narrowing of blood vessels, especially after procedures like angioplasty. When a blood vessel becomes narrowed due to conditions like atherosclerosis, the stent can be deployed within the vessel and expanded, providing structural support that maintains the vessel's patency. This helps to ensure adequate blood flow and can alleviate symptoms associated with reduced circulation. The function of maintaining open vessels is crucial in preventing ischemic events and promoting normal organ function.

Other items like devices for measuring blood pressure, tools for tissue biopsy, or methods for delivering medication have distinct purposes unrelated to the mechanical support offered by stents. These other options serve different roles in medical practice and do not fulfill the primary function that stents are designed for.