Arterial Replacement: Failure of Synthetic Prostheses

Hussey, Hugh H.

doi:10.1001/jama.1976.03260340054028

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…The design of the textile structure is important because ultralight-weight weftknitted grafts have shown their poor stability in the past. 2,[5][6][7][8] In contrast to this paper, in which localized ruptures of certain graft regions are demonstrated, general degradation of the textile structure by hydrolysis has been proved. 18,19 The macroscopic analysis of the explanted prostheses demonstrated that longitudinal ruptures always occurred in two specific areas of the prosthetic structure: the guide line and the remeshing line.…”

Section: A B Cmentioning

confidence: 91%

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Longitudinal ruptures of polyester knitted vascular prostheses

Chakfé¹,

Riepe²,

Diéval³

et al. 2001

Journal of Vascular Surgery

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Section: A B Cmentioning

confidence: 91%

“…These ruptures consisted in holes and transversal or longitudinal tears and more often were multiple and observed on the overall prosthesis. 2,[5][6][7][8] Consequently, weft-knit structures have been discarded because of their poor longterm stability and replaced with warp-knit structures. Warp-knitted structures are more complex than weft knits.…”

mentioning

confidence: 99%

Longitudinal ruptures of polyester knitted vascular prostheses

Chakfé¹,

Riepe²,

Diéval³

et al. 2001

Journal of Vascular Surgery

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“…In addition, there are numerous other deaths which are suspected but remain unrecorded for various reasons, including lack of appropriate ongoing studies in patients, possible legal implications, and unperformed autopsy of deceased persons 8. Some health professionals have already discarded the use of PET as a prosthetic grafts because of poor long term stability,9–12 while others recommend that laboratory accelerated tests must be carried out to evaluate the long‐term efficacy of PET prosthetic grafts 13–14. Chakfe et al8 proposed a protocol for an in vitro investigation of physical and chemical properties changes of virgin polyester prostheses.…”

Section: Introductionmentioning

confidence: 99%

Effect of applied stress on the alkaline hydrolysis of poly(ethylene terephthalate) at 40°C: Relevance to medical textiles

Rahman

East

2006

J of Applied Polymer Sci

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Laboratory-accelerated degradation tests have been conducted to understand the stability of high tenacity poly(ethylene terephthalate) (PET) as a result of exposure to stressful chemical environments when used as an implantable prosthesis. The experiments were conducted at 408C to mimic normal physiological conditions. At various time intervals, samples were collected and evaluated for weight loss (%), mechanical properties, and changes in the surface structure. The mechanical properties that were specifically observed include: breaking load, tenacity, breaking strain, work of rupture, and modulus. For all PET fibers loss of work of rupture was the highest. An empirical formula was developed to estimate degradation behavior over time, though such a prediction cannot be verified without further research and observation. The transverse cracks formed on the stressed samples beyond the critical load in an alkaline environment at 408C are similar to those found on the PET prosthetic grafts. The cracks in the experimental samples at 408C and those recovered from human bodies both appear more 'corallite in structures' versus those at room temperature. Therefore, it is concluded that the arterial stress that the PET prosthetic graft encountered inside the human body was higher than the yield load of the fiber.

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“…The cause of these problems can sometimes have an origin in the textile struc-ture itself. For example, the abandonment of the weft knit structure to the benefit of the warp knit structure notably improved the behavior with ageing [1][2][3][4][5]. However, although this change increased the lifespan of the prosthesis, the ruptures of the prosthetic wall did not disappear [6][7][8][9][10][11][12][13][14][15].…”

mentioning

confidence: 99%

“…However, although this change increased the lifespan of the prosthesis, the ruptures of the prosthetic wall did not disappear [6][7][8][9][10][11][12][13][14][15]. The two principal long-term complications, dilation and the rupture [2,3,8,[16][17][18][19][20], are always actual problems. Thus, there still remains degradation, related to the physical or Abstract The prosthetic explants collection in PET knitted prosthesis enabled us to count a great number of longitudinal ruptures close to the looping wale.…”

mentioning

confidence: 99%

Influence of Textile Structure on Longitudinal Ruptures' Localization of the Vascular Prostheses

Diéval

Mathieu

Durand

2008

Textile Research Journal

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The prosthetic explants collection in PET knitted prosthesis enabled us to count a great number of longitudinal ruptures close to the looping wale. Previous studies showed modifications of the polymer organization after a stay in the human body. To supplement these studies, we undertook circumferential traction tests, which partly simulated the action of a pressure in the prosthesis. As the localization of a rupture is often caused by a localization of the constraints, we used a video camera to make films of the knitting structure in order to highlight the behavior of a mechanical heterogeneity. This device also allowed us to define a global coefficient related to the deformability of the textile structure. The overall results showed that for similar prostheses, a structural heterogeneity existed. It then generated various behaviors which were constraint sources and thus of ruptures by mechanical fatigue. Therefore, our approach highlighted the possibility of an early study of the rupture zones' localization. For that study, the investigation methods require improvement. However, the heterogeneity of the mechanical behavior was not able to explain the entire ageing phenomenon. For example, the guide-line ruptures are not yet well understood.

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Arterial Replacement: Failure of Synthetic Prostheses

Cited by 9 publications

References 2 publications

Longitudinal ruptures of polyester knitted vascular prostheses

Longitudinal ruptures of polyester knitted vascular prostheses

Effect of applied stress on the alkaline hydrolysis of poly(ethylene terephthalate) at 40°C: Relevance to medical textiles

Influence of Textile Structure on Longitudinal Ruptures' Localization of the Vascular Prostheses

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