Which types of stents are classified as non-vascular?

Non-vascular stents are specifically designed for use in organ systems that do not pertain to the vascular system. Biliary and ureteral stents fit this classification perfectly, as they are utilized in the biliary system to maintain drainage of bile and in the ureter to facilitate the passage of urine from the kidney to the bladder.

These stents serve a critical role in managing obstructions or strictures that occur in these organs, providing a means to relieve pressure and enable normal function. The proper selection of materials and design for these types of stents focuses on biocompatibility and minimizing irritation to surrounding tissues.

In contrast, the other options present stents that are primarily used within the vascular system. Cervical and abdominal stents might suggest applications in interventional procedures, but they do not classify as distinctly separate from vascular uses. Similarly, coronary and pulmonary stents specifically cater to the cardiovascular and respiratory systems, respectively, while venous and arterial stents are inherently vascular by their functions. Thus, biliary and ureteral stents are clearly identified as non-vascular due to their specific applications outside the blood vessel system.