Follow-up of aneurysm neck diameter after endovascular repair of abdominal aortic aneurysms
| Autor: | Alberto Bravo Soberón, Gonzalo Garzón Moll, Milagros Martí de Garcia, Beatriz Rodríguez Vigil, Rodolfo Alvarez-Sala Walter, María Allona Krauel |
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| Rok vydání: | 2007 |
| Předmět: |
Male
medicine.medical_specialty Aneurysm neck Blood Vessel Prosthesis Implantation medicine.artery Adventitia medicine Humans Statistical analysis Aorta Abdominal Renal artery Neck diameter Aged business.industry Repeated measures design General Medicine Multislice computed tomography Middle Aged medicine.disease Abdominal aortic aneurysm Blood Vessel Prosthesis medicine.anatomical_structure Surgery Female Stents Radiology Cardiology and Cardiovascular Medicine business Tomography X-Ray Computed Aortic Aneurysm Abdominal |
| Zdroj: | Annals of vascular surgery. 22(4) |
| ISSN: | 1615-5947 |
| Popis: | We assessed aneurysm neck diameter change after endovascular abdominal aortic aneurysm repair (EVAR) and its relationship to stent-graft diameter. Ninety-eight patients with abdominal aortic aneurysm who underwent EVAR were studied with multislice computed tomography following a standardized protocol. A preoperative study and immediate postoperative, 6-month, 1-year, and 2-year follow-up studies were performed. The aneurysm neck was measured from adventitia to adventitia, 6 mm below the lowermost renal artery, in planar images performed perpendicular to the vessel axis (real axial section). Baseline and follow-up neck diameters were compared with stent-graft diameters. For statistical analysis, a one-way analysis of variance with repeated measures was used. Pearson's correlation coefficient was used to examine the correlation between the change in neck diameter and stent-graft diameter. The average neck diameter was 22.38 mm (range 16-32.5) on the preoperative study and 23.35 mm (17-33.9) on the immediate postoperative, 24.35 mm (18.2-34.5) on the 6-month, 24.36 mm (18-34.5) on the 1-year, and 24.39 mm (17.8-35.7) on the 2-year follow-up. The mean device diameter was 24.08 mm (20-32). A significant increase in average neck diameter was found between the preoperative, immediate postoperative control, and 6-month control. There was no significant increase in the average neck diameter between the 6-month, 1-year, and 2-year follow-up. Baseline mean stent-graft oversizing was 1.7 mm, which decreased to -0.31 mm at latest follow-up. Dilation of the neck did not significantly exceed the endograft diameter in 83 cases (87.36%). An enlargement of the infrarenal aneurysm neck occurred during the first 6 months after EVAR. No significant variation in neck diameter occurred between the 6-month and 2-year follow-up visits. In the majority of cases, dilation of the aneurysm neck does not significantly exceed stent-graft diameter and, therefore, is possibly related to the presence of the endograft. |
| Databáze: | OpenAIRE |
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