Tissue Response to Covered Wallstents

Dolmatch, Bart L.; Dong, Yun; Trerotola, Scott O.; Hunter, David W.; Brennecke, L; LaBounty, Randy

doi:10.1016/s1051-0443(98)70302-1

Cited by 47 publications

(13 citation statements)

References 19 publications

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“…For the investigation of vascular prostheses with a diameter of 6 -8 mm, vessels with high flow rates (aorta, carotid) are favorable [2,11]. The diameters cited in the literature (carotid artery, 5 mm; infrarenal aorta, 8 mm) were confirmed in our study [14,25]. By way of comparison, Ma et al interposed 6-mm prostheses end-to-end in the infrarenal aorta in the dog [26].…”

Section: Discussionsupporting

confidence: 77%

Comparison of the ovine and porcine animal models for biocompatibility testing of vascular prostheses

Ueberrueck

Tautenhahn

Meyer

et al. 2005

Journal of Surgical Research

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Section: Discussionsupporting

confidence: 77%

Comparison of the ovine and porcine animal models for biocompatibility testing of vascular prostheses

Ueberrueck

Tautenhahn

Meyer

et al. 2005

Journal of Surgical Research

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“…This might cause graft to move continuously in the pulsatile aortic blood flow and make a turbulence flow between the stent and graft. It might induce thrombosis and a poor patency rate shown in endoprosthesis where the graft material is unsupported or loosely attached to the stent (27, 28). …”

Section: Discussionmentioning

confidence: 99%

Tissue Responses to Endovascular Stent Grafts for Saccular Abdominal Aortic Aneurysms in a Canine Model

Kim

Choi

et al. 2012

J Korean Med Sci

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We investigated tissue responses to endoskeleton stent grafts for saccular abdominal aortic aneurysms (AAAs) in canines. Saccular AAAs were made with Dacron patch in 8 dogs, and were excluded by endoskeleton stent grafts composed of nitinol stent and expanded polytetrafluoroethylene graft. Animals were sacrificed at 2 months (Group 1; n = 3) or 6 months (Group 2; n = 5) after the placement, respectively. The aortas embedding stent grafts were excised en bloc for gross inspection and sliced at 5 to 8 mm intervals for histopathologic evaluation. Stent grafts were patent in all except a dog showing a thrombotic occlusion in Group 2. In the 7 dogs with patent lumen, the graft overhanging the saccular aneurysm was covered by thick or thin thrombi with no endothelial layer, and the graft over the aortic wall was completely covered by neointima with an endothelial layer. Transgraft cell migration was less active at an aneurysm than at adjacent normal aorta. In conclusion, endoskeleton stent grafts over saccular aneurysms show no endothelial coverage and poor transgraft cell migration in a canine model.

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“…Inflammation has been shown to occur in Wallgraft endoprostheses that were implanted in animal arteries 1 month previously. 7 Although the inflammation tends to abate in 3 to 6 months, it is replaced by a fibrotic neointima on the luminal surface, which produces an ingraft stenosis of up to 50%. Dolmatch, et al, 7 found that a polyethylene terephthalate-covered Wallstent invites a much greater inflammatory response than an uncovered Wallstent in a canine model.…”

Section: Discussionmentioning

confidence: 99%

Delayed stenosis following placement of a polyethylene terephthalate endograft in the cervical carotid artery

Smith

Alexander²,

Enterline³

2003

Journal of Neurosurgery

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Three patients with carotid artery (CA) pseudoaneurysms were treated using four polyethylene terephthalate endografts (Wallgraft endoprostheses). Two patients received a single graft and one patient with bilateral pseudoaneurysms received two grafts. Complete occlusion of the pseudoaneurysm with patency of the arterial lumen was achieved following endograft placement in all patients. The clinical follow-up interval ranged from 12 to 18 months and included angiography or ultrasonography studies or both. One patient experienced neurological symptoms, and in-graft stenosis ranging from 50 to 100% occurred in three of the four grafts. Although the Wallgraft endoprosthesis produced good initial results for the treatment of cervical CA pseudoaneurysms, as demonstrated on radiography, it was associated with a high rate of stenosis or occlusion in all three patients.

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Tissue Response to Covered Wallstents

Cited by 47 publications

References 19 publications

Comparison of the ovine and porcine animal models for biocompatibility testing of vascular prostheses

Comparison of the ovine and porcine animal models for biocompatibility testing of vascular prostheses

Tissue Responses to Endovascular Stent Grafts for Saccular Abdominal Aortic Aneurysms in a Canine Model

Delayed stenosis following placement of a polyethylene terephthalate endograft in the cervical carotid artery

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