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Methods and systems for treatment of acute ischemic stroke

  • US 10,569,049 B2
  • Filed: 06/16/2017
  • Issued: 02/25/2020
  • Est. Priority Date: 12/23/2013
  • Status: Active Grant
First Claim
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1. A suction catheter system comprising:

  • a guide catheter comprising a tubular shaft with a central lumen having an inner diameter, a proximal end and a distal opening, and a proximal section operably connected with the proximal end of the tubular shaft and having fittings that connect to a suction device; and

    a suction extension comprising a proximal portion, a suction tip comprising a distal opening and extending from the proximal portion in a distal direction, and a control structure connecting the proximal portion with the proximal section of the guide catheter, the suction tip having a distal inner diameter that is between about 0.035″ and

    about 0.095″ and

    the central lumen inner diameter is between about 0.065″ and

    about 0.120″

    ,wherein the proximal portion is configured to slide within the central lumen of the tubular shaft to change the relative position of the proximal portion within the central lumen and provide for at least a portion of the suction extension to extend outward from the distal opening of the tubular shaft,wherein an effective seal is formed in an overlap region by a tight fit between a cylindrical outer surface of the proximal portion of the suction extension and a cylindrical inner surface of the central lumen of the guide catheter,wherein a suction lumen is formed extending from the fitting configured to connect to the suction device through a portion of the central lumen, the proximal portion and the suction tip to the distal opening, andwherein the suction tip has a first outer diameter and the cylindrical outer surface of the proximal portion has a second outer diameter, wherein the second outer diameter is larger than the first outer diameter.

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