If a part of the metal stent has not grown into a vessel, can this part of the stent be washed out by the blood flow in 10 to 40 years (theoretically)?
Also are such cases known that blood flow destroy part of the metal stent in 10 to 20 years (practically)?
For example, titanium + nickel (self-expanding stent).
Clarification: Metal stents can corrode/dissolve, but this process is uneven, so some parts of the stents can dissolve earlier, and some later — then these parts break away from the stent and float to the heart and lung (if this part of the stent has not grown into a vessel)
Question: I clarified the question: what percentage of the different types of effects contribute to stent fragmentation: vessel pulsation, mechanical bending, blood flow? What percentage (1%, 10%, 90%) of stents breaks down into fragments from mechanical stress (arterial pulsation, ...), and what percentage (1%, 10%, 90%) of stents breaks down into fragments from blood flow (corrode/dissolve) after 10-40 years?
For example, stents broken into several parts:
Computed tomography (CT) image showing fracture of right coronary artery (RCA) stent into three fragments
- Images with broken stents: https://www.ahajournals.org/doi/10.1161/CIRCINTERVENTIONS.113.000148