Impact of Endograft Material on the Inflammatory Response After Elective Endovascular Abdominal Aortic Aneurysm Repair

Abstract

The purpose of this paper is to examine the impact of endograft material on the inflammatory response after elective endovascular abdominal aortic aneurysm repair. Consecutive patients (n=22, all men, 53 to 82 years old) were divided into 2 groups according to the graft material used: In group A (n=12) the endovascular device was made of polyester and in group B (n=10) the device was made of expanded polytetrafluoroethylene (ePTFE). All patients received antiinflammatory drugs in the perioperative period. Fever, white blood cells and platelet count, serum concentrations of cytokines (interleukin 6 [IL-6], tumor necrosis factor alpha [TNF-a], interleukin 8 [IL-8], acute-phase proteins high-sensitivity C-reactive protein [hsCRP] and alpha1-antitrypsin [a1-antitrypsin]), and complement protein (C3a) were measured preoperatively and 1, 3, 6, 24, 48, and 72 hours after aneurysm exclusion. One patient in each group had a systemic inflammatory response syndrome with 2 of the systemic inflammatory response syndrome (SIRS) criteria. No other complication associated with inflammation were present in any patient. Fever was more frequent in group A patients. Increases of white blood cells and serum concentrations of IL-6, TNF-a, hsCRP, a1-antitrypsin, and C3a and decrease of platelet count were recorded in both groups, but no statistically significant difference between them was recorded. However, serum concentrations of IL-8 were significantly higher in group A patients 24 hours postoperatively (p=0.01). No significant difference was apparent in the biological response between patients receiving a polyester or an ePTFE stent graft, except for fever and serum concentrations of IL-8.

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