The rigidity of catheter, stent, or endovascular device is measured using a three point deflection method. The sample rests perpendicular to two lower static supports, with an applied deflection site centered between them. A displacement is applied at a fixed rate while measuring the resultant force. The test stops when the displacement reaches 0.2 x span length.
The sample rests perpendicular to two lower static supports, with an applied deflection site centered between them. The spacing of the two supports is determined by the protocol. A displacement is applied using a piston at a fixed rate while measuring the resultant force. The test stops when the displacement reaches 0.2 x span length.
-Three-point deflection test bench with piston and stepper motor
-Regulated temperature bath
-Calibrated load cell
-Calibrated gauge blocks
-Data acquisition system
Displacements and forces are recorded.
ASTM F2606 – 08(2014)
Standard Guide for Three-Point Bending of Balloon Expandable Vascular Stents and Stent Systems
Cardiovascular implants — Endovascular devices — Part 2: Vascular stents
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