Dilatation of stent-grafts by luminal pressures: Experimental evaluation of polytetrafluoroethylene (PTFE) and woven polyester grafts

To evaluate the effect on dilatation of three types of covering materials used for endovascular stent-grafts. Stent-grafts with three types of covering material [0.1-mm polytetrafluoroethylene (PTFE), 0.2-mm PTFE, and 0.15-mm woven polyester] were placed in a fluid circuit. For the pulsatile pressur...

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Bibliographic Details
Published in:Cardiovascular and interventional radiology 2001-03, Vol.24 (2), p.94-98
Main Authors: SUZUKI, Kojiro, ISHIGUCHI, Tsuneo, KAWATSU, Shoji, IWAI, Hiroyoshi, MARUYAMA, Kunihiro, ISHIGAKI, Takeo
Format: Article
Language:English
Subjects:
Aortic Aneurysm - therapy
Aortic aneurysms
Biological and medical sciences
CARDIOVASCULAR SYSTEM
Catheterization
Circuits
Diseases of the cardiovascular system
EVALUATION
Grafting
GRAFTS
Humans
Implants
Medical sciences
Models, Theoretical
PHENOBARBITAL
POLYESTERS
POLYTETRAFLUOROETHYLENE
Pressure
Pulsatile Flow - physiology
Pulse
RADIOLOGY AND NUCLEAR MEDICINE
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Static pressure
Stents
VASCULAR DISEASES
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Summary:To evaluate the effect on dilatation of three types of covering materials used for endovascular stent-grafts. Stent-grafts with three types of covering material [0.1-mm polytetrafluoroethylene (PTFE), 0.2-mm PTFE, and 0.15-mm woven polyester] were placed in a fluid circuit. For the pulsatile pressure test, the luminal pressure of 190/130 mmHg was loaded up to 300,000 pulses. For the static pressure test, the luminal pressure was increased from 50 to 300 mmHg at 50-mmHg increments. The percent of dilatation of each stent-graft was compared. The 0.1-mm PTFE stent-graft was significantly more dilated than the 0.2-mm PTFE and the 0.15-mm woven polyester stent-graft (p < 0.005) in both examinations. There was no significant difference between the 0.2-mm PTFE and the 0.15-mm woven polyester stent-grafts. The dilatation of the 0.1-mm PTFE stent-graft was irreversible. The 0.15-mm woven polyester and the 0.2-mm PTFE stent-grafts may be preferable to the 0.1-mm PTFE stent-graft with regard to dilatation and deformity.
ISSN:0174-1551
1432-086X
DOI:10.1007/s002700000388