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Embolectomy catheters and methods for treating stroke and other small vessel thromboembolic disorders

  • US 6,511,492 B1
  • Filed: 05/01/1998
  • Issued: 01/28/2003
  • Est. Priority Date: 05/01/1998
  • Status: Expired due to Term
First Claim
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1. An embolectomy catheter device for removing a blood clot or other obstructive matter from a blood vessel, said device comprising:

  • an elongate flexible catheter body having a proximal end, a distal end, and a guidewire lumen which extends longitudinally through at least a portion thereof, wherein a plurality of member guide passageways extend through the distal end of the catheter; and

    an obstructive matter capturing receptacle which is initially disposed in a first stowed configuration which is passable through the obstructive matter, and is subsequently deployable to a second radially expanded configuration, the obstructive matter capturing receptacle comprises a plurality of elongate members which are preformed to generally helical configurations, and which extend through the guide passageways formed in the distal end of the catheter, said elongate members being retractable in a proximal direction through said guide passageways whereby they will assume substantially straight configurations;

    said obstructive matter capturing receptacle having a guidewire passageway which extends longitudinally therethrough in alignment with the guidewire lumen of said catheter body, such that the obstructive matter capturing receptacle and the catheter body may be advanced over a previously positioned guidewire, said elongate members being advanceable in a distal direction through said guide passageways such that they will assume their generally helical configurations and will form said clot capturing receptacle.

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