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Temporary vascular filter

  • US 20070005105A1
  • Filed: 09/07/2006
  • Published: 01/04/2007
  • Est. Priority Date: 09/21/1999
  • Status: Abandoned Application
First Claim
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1. A method of deploying a medical filter within a channel in a patient, the method comprising:

  • a) providing a filter having a radially expandable body having proximal and distal ends, the proximal end connected to a proximal element and the distal end connected to a distal element, the proximal and distal elements being ring shaped and sized to receive an elongate member in a configuration such that the proximal and distal elements are spaced apart along a longitudinal length of the elongate member, the filter defining an enclosure, the body having a distal length and a proximal length, the body being formed of a porous, resilient fabric comprising strands spaced apart to define pores extending through the fabric through which a body fluid may pass, but which restrict passage therethrough of particulate material entrained in the fluid, the body having at least one proximally oriented opening formed between strands of the fabric, the strands having been spaced apart such that the at least one opening is at least ten times the size of the pores, the at least one opening passing through the fabric along the proximal length of the body, and a retrieval catheter having a lumen with a diameter less than a maximum dimension of the body'"'"'s expanded configuration;

    b) urging the filter along a length of the channel with the filter body in a radially reduced configuration;

    c) radially expanding the body to its expanded configuration such that it substantially fills the lumen of the channel and the opening in the body is oriented proximally;

    d) permitting fluid to enter the enclosure through the proximally oriented opening and pass distally through the distal length of the body, the distal length of the body filtering from the fluid particulate material entrained therein; and

    e) drawing the proximal length of the body within the lumen of the retrieval catheter, thereby effectively closing the proximally oriented opening within the catheter to retain the particulate material within the enclosure.

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