Aneurysms of a Double Velour Aortic Graft

Nucho, Ramsay C.; Gryboski, William A.

doi:10.1001/archsurg.1984.01390220060013

Cited by 35 publications

(11 citation statements)

References 6 publications

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“…Notwithstanding certain advantages over both woven and weft knitted grafts, problems with warp knits still persist. 1,46,11,12,26,33 In accordance with recommended practices, manufacturers perform lot-to-lot testing of grafts to ensure uniformity of the following performance and construction characteristics: Studies have shown that commercial prostheses have initial bursting strengths between 10 and 50 times greater than that of a normal artery; thus, the initial strength of Dacron prostheses is not a problem. ~1'3 On the other hand, there is a progressive loss in bursting strength (about 2% annually) of Dacron arterial grafts with increasing times of implantation in humans.…”

Section: Discussionmentioning

confidence: 99%

Postoperative dilation of knitted Dacron aortic bifurcation graft

Nunn

Carter

Donohue

et al. 1990

Journal of Vascular Surgery

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Section: Discussionmentioning

confidence: 99%

Postoperative dilation of knitted Dacron aortic bifurcation graft

Nunn

Carter

Donohue

et al. 1990

Journal of Vascular Surgery

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“…Intrinsic graft failure has been defined as the inability of a graft to maintain its structural integrity while in the environment of the host tissues [6]. Intrinsic graft failure may assume one of the several clinical forms: delayed interstitial haemorrhage, generalised graft dilatation (early and late) and aneurysm formation with or without perforation [5]. Aneurysmal dilatation of knitted dacron grafts has been studied in vitro by several authors [7,8] who concluded that yarn slippage occurs early after implantation and a second stage failure is related to the characteristic behaviour of individual fibres subjected to load.…”

Section: Case Reportmentioning

confidence: 99%

“…Dacron is the most popular prosthetic material used in vascular surgery. Although anastomotic false aneurysms occur occasionally, rupture and true aneurysm formation of a prosthetic graft is an extremely rare event [1][2][3][4][5] and most reported cases have involved grafts no longer in use. The exact reason for this complication in modern grafts is difficult to ascertain but may include fabrication flaws, faulty preoperative handling as related to methods of sterilization, intra-operative damage, bio-deterioration related to hematomas or infection, and mechanical or structural fatigue.…”

Section: Introductionmentioning

confidence: 99%

True Aneurysm in a Femoro-Popliteal Dacron Graft — A Case Report and Literature Review

Khaira

Vohra

2002

Cardiovascular Surgery

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Infection and anastomotic pseudo-aneurysm formation are the usually reported complications in the use of dacron prosthesis in arterial by-pass surgery. We report a case of true aneurysm formation in the body of a knitted dacron graft used to by-pass a symptomatic above knee occlusion of the superficial femoral artery when suitable long saphenous vein was not available. This was diagnosed 10 years after surgery. A true aneurysm may be a result of pre-implantation trauma to the graft or to late fibre degeneration. Microscopic examination revealed that the dacron fibres had stretched to form a local aneurysm before rupturing to form an associated false aneurysm. Two other areas of the graft had small saccular aneurysms without rupture. The damaged portion was excised and replaced by an interposition graft of the same material.

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“…An M A has been described as a focal or general dilatation following vascular reconstruction due to the leakage of blood through the anastomosis between the prosthetic graft and the host artery [7,8]. The etiology of false aneurysms is associated with a number of different factors, including structural defects in the prostheses, the condition and degeneration of the host artery at the anastomosis, suture and suture-line failure, the method of implantation, and the mechanical forces acting at the anastomotic sites [9,10].…”

Section: Dadgar Et Almentioning

confidence: 99%

Longitudinal Forces Acting on a Knitted Polyester Arterial Prosthesis When Implanted as a Thoracic Aorta Substitute in the Dog

Dadgar

Deng

Marois

et al. 1994

Journal of Investigative Surgery

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The longitudinal forces under which arterial prostheses are held in situ are of great importance. The tension caused by the longitudinal force may be one of the factors involved in the formation of anastomotic false aneurysms. In order to measure the changes in the longitudinal force at both proximal and distal end-to-end anastomoses over different periods of implantation, we devised an experimental study in which the changes in length of a warp-knitted polyester VP1200K (Vascutek Ltd., Inchinnan, Scotland) arterial prosthesis, used as a thoracic aorta substitute in the dog, were recorded photographically at implantation and removal. The longitudinal forces acting at the two sites were then calculated using a linear relationship between the longitudinal force and the changes in length of a virgin prosthesis, which was found experimentally in vitro using a computerized laser calibration system. One-tailed Student's t-test showed no significant difference between the length indicator values at the two anastomotic sites at different periods of implantation except during the 1-month period. Textile analysis of the explanted prostheses and histopathologic observations confirmed this similar behavior at the two anastomotic sites. These observations were contrary to the theoretic prediction regarding the effect of forces applied by drag and tissue ingrowth. Nevertheless, analysis of variance confirmed that there was no difference evident at the two sites between different implantation periods. These observations may explain why the formation of anastomotic false aneurysms is less common at end-to-end anastomoses.

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Aneurysms of a Double Velour Aortic Graft

Cited by 35 publications

References 6 publications

Postoperative dilation of knitted Dacron aortic bifurcation graft

Postoperative dilation of knitted Dacron aortic bifurcation graft

True Aneurysm in a Femoro-Popliteal Dacron Graft — A Case Report and Literature Review

Longitudinal Forces Acting on a Knitted Polyester Arterial Prosthesis When Implanted as a Thoracic Aorta Substitute in the Dog

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