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Vascular embolism prevention device employing filters

DC
  • US 6,485,502 B2
  • Filed: 03/12/2001
  • Issued: 11/26/2002
  • Est. Priority Date: 03/10/2000
  • Status: Expired due to Term
First Claim
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1. A system for preventing embolism and microembolism in a vascular system, said system comprising:

  • an elongated support element;

    a first filter element with millipores carried by said support element and radially expandable from a closed condition to an open condition;

    a second filter element surrounding said support element and radially expandable from a closed condition to an open condition; and

    means coupled to at least one of said filter elements for moving said at least one said filter elements between its respective closed and open conditions independently of movements of the other one of said filter elements between its respective closed and open conditions, wherein each of said filter elements has a filter surface structured to prevent passage of particles and permit passage of blood.

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