What is the primary role of strut thickness in stent design?

• A. It affects the stent's recoil properties
• B. It determines the stent’s deliverability
• C. It influences the stent's conformability
• D. It affects the radial strength

Answer: (D)

The primary role of strut thickness in stent design is to affect the radial strength. Radial strength is critical because it determines the stent's ability to withstand external compressive forces and remain open once deployed in a blood vessel. A stent with sufficient radial strength ensures that it can maintain vessel patency and resist collapse under varying physiological conditions.

Strut thickness directly correlates to the stent's overall structural integrity. Thicker struts generally provide greater radial strength, which is essential in preventing restenosis and ensuring long-term success in vascular interventions. However, increasing strut thickness can also lead to reduced flexibility and increased profile, which can complicate delivery and deployment. Understanding this balance is crucial in stent design.

While strut thickness does influence conformability and deliverability to a certain extent, its primary impact is indeed on the radial strength, making it a vital factor in ensuring the stent functions effectively once implanted.