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.

Test Procedure

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.

Measured Parameters

Difference between the largest and smallest diameter measurement on a single stent deployed to its labelled diameter

Scope

  • Balloon Expandable Stent
  • Self-expending stent
  • SS, CrCo, NiTi, any other metal alloys

Service Levels

Applicable Standards

  • ISO 25539-2:2020
    Cardiovascular implants — Endovascular devices — Part 2: Vascular stents

Related Tests

OLE1209


ViVitro Labs Advantages

Many companies look to academia to handle their testing needs due to the reduced cost. With ViVitro Laboratory Services you gain the following advantages:

Time to Market
We understand how critical your timelines are. Our expertise and experience ensure your schedule is met and our commitments are delivered on time.

ISO 17025 Accredited
For studies used for regulatory approval this is a must. Accredited by A2LA and Cofrac.

Free Initial Consultations
All of our studies are scoped via no-cost, no obligation, collaborative consultation.

Guaranteed Confidentiality
We happily provide Non-Disclosure Agreements for all services, including initial consultation.

Join over 5000 cardiovascular device professionals who receive our testing and engineering insights and tips every month.