Endovascular Management of Pseudoaneurysms and Aneurysms Following Gastrointestinal Surgery

Abstract

Purpose:This study aimed to evaluate the characteristics of pseudoaneurysms and aneurysms following gastrointestinal surgery treated with endovascular management (i.e., transcatheter arterial embolization or stent-graft placement). Methods:This retrospective study included 17 patients with pseudoaneurysms and 1 patient with an aneurysm following gastrointestinal surgery in a tertiary care hospital between 2011 and 2021. There were 15 men and 3 women aged 37-85 years, with an average age of 67 years. All patients underwent endovascular management. We retrospectively analyzed their angiographic features and clinical outcomes. Results:Arterial embolization was performed in 11 patients, and stent-graft placement was performed in 7 patients. Additional arterial embolization was necessary for another bleeding lesion in 2 patients, while 1 patient died of multiple organ failure. Stent-graft occlusion occurred after a few days in 3 out of 7 patients without any antithrombotic drugs. Extravascular migration of the occluded stentgrafts was observed in 3 out of 7 patients, wherein these stent-grafts migrated to the intestine and eventually disappeared in 2 patients. There were no clinical symptoms related to the occlusion or migration of the stent-grafts. Conclusion:Both arterial embolization and stent-graft place-ment are effective in the management of postoperative pseudoaneurysms and aneurysms. Stent-graft placement is suitable for cases with poor collateral flow because it preserves arterial patency. The use of antithrombotic treatment and the risk of stent-grafts migration should be taken into consideration.

Advances of in situ transmission electron microscopy research on gas phase catalyst particles

“…11a). 69 At relatively low temperatures (600 °C), the oxidation of Ni nanoparticles undergoes the classic Kirkendall process and is accompanied by the formation of an oxide shell. In contrast, at higher temperatures (800 °C), oxidation begins with a single crystal nucleus on the metal surface and proceeds along the metal/oxide interface, without forming a cavity throughout the process.…”

“…Copyright 2023, reprinted with permission from American Chemical Society. 69 Structural tension analysis of 5-FTAu nanoparticles during detwinning and corresponding MD simulated detwinning (b). Copyright 2024, reprinted with permission from American Chemical Society.…”

Theoretical study of the functional characteristics of composite fiber/colorant materials for military digital camouflage

“…shrinkage of fiber, fixation of mixed dye and fiber, and anti-NIR detection. In the literature, studies have focused on the development and application of fabric [1][2][3][4], the analysis of physical and chemical characteristics of fabric [5][6][7][8][9][10], the development and analysis of camouflage dyes in multiple spectrum ranges [11][12][13][14][15][16][17] the application of NIR technology to create functional fabrics [18][19][20][21][22][23][24] the use and effects of inorganic dyes [25][26][27].…”