The proximal optimizing technique (POT) -proximal balloon edge dilation (PBED) sequence for side branch (SB) dilatation with cross-over single-stent implantation decreases both strut obstruction at the SB ostium and stent deformation at the main branch (MB).

The purpose of this experimental bench test was to assess the impact of stent design on stent deformation, obstruction by stent struts at a jailed SB ostium, and stent strut malapposition in the POT-PBED sequence.

Fractal coronary bifurcation bench models (60- and 80-degree angles) were used, and crossover single-stent implantation (3-link stent: XIENCE Sierra, Abbott Vascular, Santa Clara, CA, n = 10; 2-link stent: Synergy, Boston Scientific, Marlborough, MA, n = 10) was performed from the MB using the POT-PBED sequence. Jailing rates at the SB ostium, stent deformation, and stent strut malapposition of the bifurcation segment were assessed using videoscopy and optical coherence tomography.

After SB dilatation using the PBED technique, jailing rates at the SB ostium and stent deformation did not differ significantly between the two types of stents. Conversely, the rate of malapposed struts of the bifurcation segment after the PBED procedure was significantly lower with 3-link stents than with 2-link stents for both 60- and 80-degree angles (60-degree angle: 4.3% ± 4.4% versus 22.0% ± 11.1%, P = 0.044; 80-degree angle: 20.8% ± 15.1% versus 57.2% ± 17.0%, P < 0.001, respectively).

In the POT-PBED sequence, 3-link stents might be a preferable coronary bifurcation stent, maintaining a jailed SB ostium while significantly reducing stent strut malapposition of the bifurcation segment when compared with 2-link stents.

近端优化技术 (POT) - 用于侧支 (SB) 扩张的近端球囊边缘扩张 (PBED) 序列与交叉单支架植入减少了 SB 开口处的支柱阻塞和主分支 (MB) 处的支架变形。

该实验台测试的目的是评估支架设计对支架变形、支架支柱在被监禁的 SB 口处的阻塞以及 POT-PBED 序列中支架支柱贴壁不良的影响。

使用分形冠状动脉分叉台模型（60 度和 80 度角）和交叉单支架植入（3 连杆支架：XIENCE Sierra，雅培血管，加利福尼亚州圣克拉拉，n = 10；2 连杆支架：Synergy , Boston Scientific, Marlborough, MA, n = 10) 是使用 POT-PBED 序列从 MB 进行的。SB 口的监禁率、支架变形和分叉段的支架支柱贴壁不良使用视频检查和光学相干断层扫描进行评估。

在使用 PBED 技术进行 SB 扩张后，两种类型的支架在 SB 口处的监禁率和支架变形没有显着差异。相反，对于 60 度角和 80 度角（60 度角：4.3% ± 4.4% 与22.0% ± 11.1%，P = 0.044；80 度角：分别为 20.8% ± 15.1% 与 57.2% ± 17.0%，P < 0.001）。

在 POT-PBED 序列中，3 连杆支架可能是一种更可取的冠状动脉分叉支架，与 2 连杆支架相比，它可以保持固定的 SB 开口，同时显着减少分叉段的支架支柱贴壁不良。