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Aspiration method

DC
  • US 6,454,741 B1
  • Filed: 03/24/2000
  • Issued: 09/24/2002
  • Est. Priority Date: 03/06/1997
  • Status: Expired due to Term
First Claim
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1. A method of treatment of a blood vessel in which blood fluid flows proximally to distally, said method comprising:

  • delivering a guidewire having a proximal end and a distal end and an expandable device thereon into the blood vessel, said expandable device being actuatable between a nonexpanded state and an expanded state, said expandable device when in said expanded state forming a barrier sufficient to inhibit emboli suspended in said fluid from migrating past the barrier in a proximal to distal direction;

    preventing emboli from moving in a distal to proximal direction by exposing said expandable device to blood fluid pressure within said vessel;

    advancing a catheter having a lumen in fluid communication with a distal opening in the catheter, said advancing comprising moving said distal opening relative to said expandable device within the blood vessel such that said opening is distal to at least a portion of an occlusive substance within said blood vessel, said occlusive substance comprising said emboli suspended in said fluid; and

    drawing fluid from the vessel into the distal opening such that (a) a fluid flow is created in the lumen in a distal to proximal direction, and (b) said fluid flow is simultaneously created in said vessel in a proximal to distal direction, whereby said emboli are carried by said fluid flow from said vessel into said distal opening and through said lumen of said catheter.

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