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Is there can be used any external stents or something like this to solve aorto-venous conflict (May-Thurner syndrome) or Nutcracker syndrome?

For example, a stent consisting of polytetrafluoroethylene, which is placed on top of the vein so that it is not constricted. Performing an open abdominal surgery.

Because Internal stenting (common angioplasty and stenting) is subject to risks:

  • of compression of the stent - because the stent cannot be very durable due to the limitations of wire thickness.

  • and migration of the stent, in which case it is necessary to take anticoagulants for life

In opposite, External stent doesn't require to take anticoagulants at all, and can be very durable (high radial stability).

PS

Any references to scientific papers are welcome.

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  • Angioplasty and stenting is a common treatment for May-Thurner. However, the stents aren't external. They're placed inside the vein as with most stents, and open abdominal surgery isn't required. That's readily available information found easily with a web search. Are you specifically asking about some sort of external stenting? – Carey Gregory Jul 3 '19 at 23:49
  • @Carey Gregory Internal stent can be compressed or can migrate then it is necessary to take anticoagulants for life. In opposite, External stent doesn't require to take anticoagulants at all, and can be very durable (high radial stability). – Alex Jul 4 '19 at 6:23
  • @Alex Although I don't know if it applies to all cases, it looks like the stents used in these procedures are shape-memory stents like WALLSTENT (made of a material like nitinol). Those stents are amazingly difficult to compress, and even when compressed with strong force their shape memory means they re-expand. I also can't imagine a stent like that ever migrating unless it was deployed in a completely inappropriate diameter vessel - can you provide an example? – Bryan Krause Jul 5 '19 at 16:10
  • @Bryan Krause 1. If the stent diameter is less than the diameter of the vessel - it can migrate. 2. If the diameter of the stent is larger than the diameter of the vessel, it may later increase in diameter (by stretching the vein), shrink in size - the edge of the stent will leave the compression site - the stent will not be holded by compressions and may migrate. 3. A very strong compression can immediately permanently squeeze the stent, the stent will lengthen and its part will protrude into the lumen of the intersection of the veins where it will not grow into the vessel. – Alex Jul 6 '19 at 19:01
  • @Bryan Krause Usually, you cannot determine the diameter of a non-uniformly compressed vessel with absolute precision. – Alex Jul 6 '19 at 19:03

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