Radial strength is mainly determined by which of the following factors?

• A. Only metal composition
• B. Strut thickness and metal composition
• C. Only stent geometry/pattern
• D. Only profile

Answer: (B)

The determination of radial strength in stent design is influenced significantly by both strut thickness and metal composition.

Strut thickness plays a crucial role in defining how much force the stent can withstand while maintaining its shape and functionality when subjected to radial pressures. Thicker struts generally provide increased radial strength, allowing the stent to better resist expansion forces exerted by surrounding tissues or fluids.

Metal composition is equally important as it directly affects the material properties, such as tensile strength and flexibility. Different metals have varying mechanical characteristics, which can enhance or reduce the radial strength of the stent. For instance, some metal alloys may provide better strength-to-weight ratios, contributing to overall performance in the body.

Together, these factors create a synergistic effect in which the combination of strut thickness and the choice of metal composition optimizes the radial strength of the stent. This understanding is crucial for designing stents that can perform effectively in clinical settings, ensuring durability and reliability during vascular interventions.