Radiopaque bioabsorbable occluder
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United States of America Patent
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Issued Date -
May 24, 2007
app pub date -
Oct 24, 2006
filing date -
Oct 24, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides an occluder for a biological defect, such as an atrial septal defect (ASD) or a patent foramen ovale (PFO). The occluder is at least partially formed of a radiopaque, bioabsorbable material. In some embodiments, the occluder is formed from a tube, which is cut to produce struts in each side. Upon the application of force, the struts deform into loops. The radiopaque, bioabsorbable material is a blend of a biocompatible radiopaque material with a bioabsorbable material. In some embodiments, the radiopaque material may have a mass attenuation coefficient greater than about 1.2 cm.sup.2/gm and/or a linear attenuation coefficient greater than about 9 cm.sup.-1. In some embodiments, the radiopaque material is tungsten. In some embodiments, the bioabsorbable material may have a molecular weight greater than about 300,000. In some embodiments, the bioabsorbable material is a polymer.
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