Details

Autor(en) / Beteiligte

• Baer, Géraldine M.
• Wilson, Thomas S.
• Small, Ward
• Hartman, Jonathan
• Benett, William J.
• Matthews, Dennis L.
• Maitland, Duncan J.

Titel

Thermomechanical properties, collapse pressure, and expansion of shape memory polymer neurovascular stent prototypes

Ist Teil von

• Journal of biomedical materials research. Part B, Applied biomaterials, 2009-07, Vol.90B (1), p.421-429

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

Erscheinungsjahr

2009

Quelle

Access via Wiley Online Library

Beschreibungen/Notizen

• Shape memory polymer stent prototypes were fabricated from thermoplastic polyurethane. Commercial stents are generally made of stainless steel or other alloys. These alloys are too stiff and prevent most stent designs from being able to navigate small and tortuous vessels to reach intracranial lesions. A solid tubular model and a high flexibility laser etched model are presented. The stents were tested for collapse in a pressure chamber. At 37°C, the full collapse pressure was comparable to that of commercially available stents, and higher than the estimated maximum pressure exerted by intracranial arteries. However, there is a potential for onset of collapse, which needs further study. The stents were crimped and expanded, the laser‐etched stent showed full recovery with an expansion ratio of 2.7 and a 1% axial shortening. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2009