Eastern Heart Clinic, Prince of Wales Hospital, Sydney, Australia.
EuroIntervention. 2011 Jun;7(2):256-62. doi: 10.4244/EIJV7I2A41.
This is the initial report of stent deformation/pseudofracture of the 7 crown Endeavor/Micro Driver stent platform (2.25-2.75 mm), whereby the post-dilation balloon catches and causes major stent deformation angiographically appearing as a large stent fracture. We sought to determine frequency and cause.
Analysis of 1,000 consecutive Endeavor/Micro Driver stents (7 crown) deployed at our institution. Bench testing was also performed by deploying 10 stents in 2.5 mm tubing and then attempting re-crossing with non-compliant balloons.
There were 14 cases of major stent deformation/pseudofracture representing an incidence of 1.4% or 1.8% of 775 stents that were post-dilated. Of the 14 deformed stents, re-stenting was required in nine and MACE occurred in five (36%.). Benchtop results: Balloon "catch" was reproducible at an initial frequency of 9% and affected three of the 10 stents. With the use of provocative measures stent deformation occurred in 50% of test stents.
Stent deformation/pseudofracture of the 7 crown Endeavor/Micro Driver platform occurred in 1.8% of cases that were post-dilated. Of these, 36% experience MACE. Deformation can be reproduced on the benchtop. Operators should be aware of the complication, and develop strategies to deal with it.
这是首次报道 7 冠 Endeavor/Micro Driver 支架平台（2.25-2.75mm）发生支架变形/假性骨折，即后扩张球囊卡住并导致支架严重变形，血管造影上表现为大的支架断裂。我们旨在确定其发生频率和原因。
对本机构植入的 1000 例连续 Endeavor/Micro Driver 支架（7 冠）进行分析。还通过在 2.5mm 管中植入 10 个支架，然后尝试用非顺应性球囊重新穿过，进行了支架的台架测试。
14 例发生严重支架变形/假性骨折，占 14 例支架变形/假性骨折的 1.4%或 775 例后扩张支架的 1.8%。在 14 个变形支架中，9 个需要再次植入支架，5 个发生了主要不良心脏事件（MACE）（36%）。台架测试结果：球囊“卡住”的初始发生率为 9%，影响了 10 个支架中的 3 个。使用刺激性措施后，50%的测试支架发生了支架变形。
7 冠 Endeavor/Micro Driver 支架平台的支架变形/假性骨折在 1.8%的后扩张病例中发生，其中 36%的病例发生 MACE。该并发症可在台架上重现。术者应意识到该并发症，并制定应对策略。
