Posted on: January 4, 2018
SABER DEVELOPS A MACHINE FOR TESTING DURABILITY OF CORONARY STENTS
The Coronary Stent Bending Fatigue Tester is a piece of benchtop equipment used to perform bending durability testing on expanded coronary stents by applying a specific bending deflection. The bending deflection is adjustable and specified by the minimum and maximum deflection angle and/or the minimum and maximum radius of curvature. The test sample shall consist of an expanded stent or pair of overlapped expanded stents deployed inside a transparent tubing or “mock vessel”.
- Adjust and verify the maximum and minimum bend angle prior to initiation of testing. Bend angles range between 0º (C shape) and 180º (straight line) with a tolerance of ± 1º.
- Adjust and verify the maximum and minimum bend radius of curvature prior to initiation of testing. Bend radius of curvatures range between 10 mm and 50mm (a straight line) with a tolerance of ± 0.5 mm.
- Specify the cycle speed (test frequency) within the range of 0 Hz to 60 Hz.
- Test samples deployed in a mock vessel with phosphate buffered saline (PBS) flowing through the vessel. PBS flow rate shall be adjustable between 20 mL/min and 100 mL/min.
- Maintain a constant temperature at the test specimen. Temperature shall be set between 30 and 45 ºC with a tolerance of 1ºC
- Accommodate stents with a range of diameters from 2.0 mm ID to 10.0 mm ID. Corresponding tubing OD ranges from 2.0 mm to 15.0 mm.
- Accommodate stents with a range of lengths from 8 mm to 150 mm.
- Test samples at an accelerated frequency and maintain bend and angle tolerances over a life of more than 200 billion cycles.
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- Saline Flow and Temperature Control System
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