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Embolic elements and methods and apparatus for their delivery

  • US 5,690,671 A
  • Filed: 12/13/1994
  • Issued: 11/25/1997
  • Est. Priority Date: 12/13/1994
  • Status: Expired due to Term
First Claim
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1. An embolic element comprising a filament composed of a shape memory material having a transition temperature, wherein the filament is in an unexpanded coil configuration at a first temperature at or below the transition temperature and assumes an expanded configuration when the temperature is raised to or above the transition temperature, wherein the expanded configuration is a random matrix which defines a peripheral envelope which is larger in all dimensions than that of the unexpanded coil configuration.

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