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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Aged, Aged, 80 and over, Aorta, Abdominal, Aortic Aneurysm, Abdominal, Aortography, Blood Vessel Prosthesis, Blood Vessel Prosthesis Implantation, Dilatation, Pathologic, Female, Follow-Up Studies, Foreign-Body Migration, Humans, Incidence, Kaplan-Meier Estimate, Male, Middle Aged, Proportional Hazards Models, Prosthesis Design, Time Factors, Tomography, X-Ray Computed, Treatment Outcome.
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Are aortic neck dilatation and endograft migration correlated with self-expanding endografts? Context: To compare self-expanding and balloon-expandable stent-grafts in terms of aortic neck dilatation and endograft migration. Two-hundred and forty-two patients (178 men; mean age 68 years, range 56-91) underwent elective endovascular repair of abdominal aortic aneurysm. Two-hundred self-expanding (115 Excluder, 48 Endologix, 23 Vanguard, 10 Anaconda, and 4 Talent) and 42 balloon-expandable (Lifepath) endografts were used. All patients underwent contrast-enhanced computed tomography (CT) prior to the intervention, at 1, 3, and 6 months after the procedure, and annually thereafter. Comparison was made between the first and the last follow-up CT scans. Fifty-five (27.5%) of the 200 patients treated with self-expanding endografts had aortic neck dilatation compared to only 3 (7.1%) of the 42 patients treated with balloon-expandable endografts (p = 0.023). Forty-nine (24.5%) patients in the self-expanding group versus only 3 (7.1%) patients of the balloon-expandable group presented with endograft migration (p = 0.034); all had dilated necks. The difference between the means of neck dilatation for the Lifepath balloon-expandable stent-graft and the Excluder self-expanding endoprosthesis was statistically significant (p = 0.011, 95% CI 0.07 to 0.91).
assistant
Aortic neck dilatation following endovascular AAA repair appears to be correlated with self-expanding endografts, which may contribute to a higher incidence of graft migration compared to that occurring with balloon-expandable endografts. Final Decision: yes