Optimal balloon positioning for the proximal optimization technique? An experimental bench study. Academic Article uri icon

Overview

abstract

  • AIMS: The proximal optimization technique (POT) in coronary bifurcation stenting improves apposition and side-branch obstruction. The POT balloon should be positioned with the distal radio-opaque marker at the carina cut plane. However, the real impact of positioning remains unknown. METHODS AND RESULTS: Synergy™ stents (Boston Scientific, USA) were implanted on left-main fractal bench models. Initial POT was performed in 3 positions according to distal shoulder position (loss of balloon parallelism) relative to the carina cut plane (n = 5/group): i) "proximal", 1 mm before carina; ii) "medium", just at carina; iii) "distal", 1 mm after carina. Results were quantified on 2D- and 3D-OCT. Compared to implantation, initial POT improved malapposition in all positions ("proximal": 61.5 ± 1.4% vs. 5.1 ± 2.7%; "medium": 60.2 ± 2.4% vs. 1.3 ± 0.6%; "distal": 60.5 ± 2.9% vs. 1.1 ± 1.8%, p < 0.05). However, residual malapposition was greater in "proximal" position (p < 0.05). "Proximal", unlike "medium" or "distal" POT, also failed to improve side-branch obstruction. Conversely, "distal" POT significantly overstretched the main-branch ostium, with stent/artery ratio 1.22 ± 0.04 vs. 1.11 ± 0.07 for "medium" POT (p < 0.05). CONCLUSION: Shoulder positioning is essential to optimize the mechanical benefit of POT without main-branch overstretch (too distal position). Experimentally, the best position is just at the carina cut plane ("medium").

publication date

  • May 18, 2019

Research

keywords

  • Angioplasty, Balloon, Coronary
  • Stents

Identity

Scopus Document Identifier

  • 85065957668

Digital Object Identifier (DOI)

  • 10.1016/j.ijcard.2019.05.041

PubMed ID

  • 31130279

Additional Document Info

volume

  • 292