Mit einem Modellierballon eben, der sich bei der PTA flexibel den individuellen pathoanatomischen Eigenheiten der (Bifurkations-)Stenose anpasst und so die Stentinsertion ermöglicht....

The Q50® PLUS device is a full occlusion / modeling balloon catheter that is uniquely conformable to help aortic stent grafts fully expand and seal in both tortuous and straightforward vessels ranging from 10 – 50 mm in diameter.
http://www.goremedical.com/q50/

Lowest crossing profile stent graft modeling balloon
http://www.aortic.medtronicendovascular.com/us/reliant/produ...

modeling balloon-expandable stenting
https://books.google.de/books?id=Kj6a6ALjbYMC&pg=PA282&lpg=P...

If balloon modeling is desired, use a compliant balloon equal in size to the largest diameter stent graft used.
http://www.boltonmedical.com/library/~/media/BoltonMedical/i...

Type III endoleak due to fabric defect is a rare but serious complication. It has been reported with other stent graft systems XXX and with the XXX system in one case report in which the fabric tear was caused by balloon modeling during the implantation procedure.
http://www.jvascsurg.org/article/S0741-5214(08)00497-7/pdf