A multilayer stent in the aorta may not seal the aneurysm, thereby leading to rupture

Abstract

The multilayer stents are occasionally used for the treatment of complicated aortic aneurysms, including thoracoabdominal aneurysms. No aneurysm-related mortality among patients treated with this technique has been described in the literature to date. We describe a case of rupture of an aortic aneurysm previously treated with a multilayer stent.

Total Endovascular Repair of Thoracoabdominal Aortic Aneurysms With Non-Customized Stent Grafts

“…Persistent sac perfusion and subsequent aneurysm rupture have been reported by Lazaris and colleagues in 2012 [25]; stent rigidity leading to aortic rupture has been noticed by Ferrero and colleagues in 2013 [26]. Sultan and colleagues [27] recently released a result of 38 patients with TAAAs treated by off-label use of multilayer stents, in which an aneurysm-related mortality rate of 71.1% was documented.…”

When Not to Implant the Multilayer Flow Modulator: Lessons Learned From Application Outside the Indications for Use in Patients With Thoracoabdominal Pathologies

“…Acceptable outcomes are possible with the MFM when used under the instructions for use (IFU, Tables 1 and 2). 13 The aim of this study was to scrutinize thoracoabdominal repairs performed using the MFM outside the IFU and analyze the adverse outcomes. This resulted in dismal clinical outcomes.…”

Hemodynamics study of a multilayer stent for the treatment of aneurysms

“…The probability of aneurysm enlargement or rupture is still existed, because the pressure slightly decreased, the aneurysm wall is still under rather high pressure compared with the same situation of covered stent implantation. If AAA treated by MS with incomplete sac thrombosis, it can lead to further aneurysm enlargement and subsequence rupture [20, 21]. …”

“…Theoretically, the MS may not seal the aneurysm, thus leading to rupture. The issue of blood flow resides inside the sac has not completely been solved, keeping the aneurysm enlargement and rupture probable [20]. But clinical experience showed that MS preserves the flow and excludes the aneurysm; the flow velocity outside the MS is then reduced up to 90% [22].…”