What is the expected life span of vascular stents?

For example: Universal (coronary/venous) stent WALLSTENT-UNI Boston Scientific, metal: nitinol = titanium + nickel.

  1. How many pulsating contractions can it withstand? Is it more than 80 heart_rate * 60 min * 24 hours * 365 days * 10 years ~= 400 millions pulsations?

    • In artery

    • In vein (for extravasal compression - aortovenous conflict - arterial pulsation affects stent in vein)

  2. How many years can (the non-grown into a vessel) areas of the stent be in the patient’s blood flow until these stent areas are destroyed?


Are there any data, whether from the manufacturer or obtained statistically about stent life span?

  • 1
    This is a question I both love and hate - and I mean that with full respect for the intent. :) This just isn't a question asked in the field: stent fracture is a big deal but lifetime of stents is asked based on restenosis and a wide variety of other factors. It's not related to "in flow" strut degradation Oct 10 '19 at 5:07
  • @BryanKrause That's exactly what I thought about this question. Thank you for expressing it so well. You could make a great answer out of this.
    – Carey Gregory
    Oct 10 '19 at 5:32
  • @BryanKrause This is the question: why does everyone bypass the issue of stent fragmentation? Especially when it comes to venous stents, where with a ~95% probability there will be no restenosis in the next 40 years. Does it mean that the manufacturer guarantee that ~99% of venous/universal stents can withstand a pulsating effect for 40 years with aorto-venous conflicts (pulsation from an artery is transmitted to a stent in a vein, and forty years of blood flow)?
    – Alex
    Oct 11 '19 at 13:30

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