Specific Shortcomings of Endograft Design

• DOI: 10.1615/jlongtermeffmedimplants.v18.i3.10
• Publication Date: 2012-07-30T09:21:04Z
• Authors: Tieying Yin; Robert Guidoin; Marc M. Corriveau; Mark Nutley; Lu Xu; Georgi R. Marinov; Lu Wang; Yahye Merhi; Robert McGregor; Ze Zhang; Yvan Douville; Stephane Turgeon; Martin King; Oren K. Steinmetz
• Keywords: Polypropylene; Abrasion (mechanical)

Further to the rapid enlargement of an aneurysm 5.6 cm in diameter after 3 years surveillance, a 79-year-old patient was fitted with Vanguard modular stent graft and monitored on regular basis for 6 years. Two later, aneurysmal sac ruptured. The died 1 month open surgery. device devoid any encapsulation ipsilateral limb detached from body. Nitinol skeleton mostly maintained, however, some polypropylene sutures were broken. resulting motion sharp-angled wires caused abrasion resulted few localized holes that sufficient permit blood percolate through textile wall. Some polyester yarns warp direction wire used this shown be corrosion resistant but selection suture inappropriate. Because technology is maturing rapidly, these weaknesses can avoided future generations endovascular devices. It recommended sutured fabric stronger than 68 decitex tubes 8 mm are selected.