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Vena cava filter

  • US 6,080,178 A
  • Filed: 09/28/1999
  • Issued: 06/27/2000
  • Est. Priority Date: 04/20/1999
  • Status: Expired due to Term
First Claim
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1. A filter, implantable in a blood vessel solely by sonographic visualization, comprising:

  • one or more wires arranged to trap blood clots without substantially interfering with normal blood flow; and

    an echogenic feature on at least one wire located in a position which during deployment of the filter remains fixed relative to one end thereof, so the filter position can be accurately determined solely by sonographic visualization.

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