Dislodgment Force – Stent Securement

Force required to initiate stent displacement from its initial crimped position and to completely dislodge the stent from the delivery system.


Test Procedure

Shim plate method. The IDTE-1000 is used to measure the force required to dislodge the pre-mounted stent from the crimped position on the non-expanded balloon and to completely separate the stent from the non-expanded balloon.  The sample is advanced into a specific sample retainer fixture, made of two plates forming a hole with a specific diameter. The IDTE roller system is used to grab the catheter with a constant grip force. The catheter is pushed or pulled through the stent retainer system until the minimum dislodgement force is recorded. Stent Behaviour is recorded with a video camera.

Pre-conditioning can be done by passing the system through a tortuous anatomy before the test.



-Stent Sample retainer fixture



Measured Parameters

Measure and record forces required to dislodge a balloon-expandable stent from its delivery system under clinically relevant conditions.

Forward Motion Dislodgement (Lesion-type test) : Advancing a stent delivery system across a tight lesion could result in stent dislodgement.

Reverse Motion Dislodgement (Guide-type test) : Withdrawing a stent (un-deployed) delivery system into a guiding catheter, arterial sheath, or hemostasis valve could result in stent dislodgement.

Worst case stent securement configuration is used for this test.


  • Stent
  • Balloon expandable stent
  • Any balloon mounted devices

Service Levels

Applicable Standards

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

  • ASTM F2394-07
    Standard Guide For Measuring Securement Of Balloon Expandable Vascular Stent Mounted On Delivery System

Related Tests


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. Victoria and Marseille labs accredited by A2LA.

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.