Uniformity of Expansion / Dog Boning Effect
Stent expansion uniformity: Difference between the largest and smallest diameter measurement on a single stent deployed to its labelled diameter.
A contactless optical gauging machine (Smartscope, OGP) is used (highest magnification: x145) to assess stent expansion uniformity. Diameter is measured at 3 axial locations of the stent and 2 perpendicular circumferential orientations when the stent is deployed at his labeled diameter.
Determines the Conformability to vessel wall and investigates any potential profile effects such as flaring or Dog boning.
Difference between the largest and smallest diameter measurement on a single stent deployed to its labelled diameter
- Balloon Expandable Stent
- Self-expending stent
- SS, CrCo, NiTi, any other metal alloys
Cardiovascular implants — Endovascular devices — Part 2: Vascular stents
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