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OCT evaluation after Tryton


European Bifurcation Club 2011, EBC 2011 – Lisbon, Portugal

OCT Session

OCT evaluation after Tryton

AuthorLino Patrício, MD, H.S. Marta, Lisbon, Portugal



The Tryton Side-Branch Stent was designed to treat complex bifurcation lesions (BL). The results of FIM study demonstrated safety and feasibility and low restenosis rate at 6-month angiographic follow-up. Stent malapposition and strut uncovered are very important in follow up.

The IUVANT IVUS study shows:

  • Complete coverage and scaffolding of side branch ostium
  • Very high stent expansion and large final area without recoil at the carina site
  • Very modest in-stent neointimal growth at follow-up

OCT is the best method to validate strut coverage and stent malapposition.


  1. TRYTON stent at bifurcation segment had 3.6% of uncovered stent strut.
  2. There was no malapposed stent strut at AO & OO in MB & SB.
  3. Only one case had “floating stent strut” at anatomical carinaand this was related with positioning of Zone 2 too proximal into the main branch.
  4. Tissue covering struts at the OS has mostly similar optical properties as compared to opposite to the ostium, which suggest “normal”.
  5. Optimal positioning may relate with virtually no floating struts at the ostium


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