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Transseptal puncture apparatus

  • US 8,292,910 B2
  • Filed: 01/05/2010
  • Issued: 10/23/2012
  • Est. Priority Date: 11/06/2003
  • Status: Active Grant
First Claim
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1. A device for puncturing the atrial septum of a patient, comprising:

  • an outer needle comprising a blunt distal end and a lumen longitudinally disposed substantially therethrough;

    a solid inner needle axially disposed in the lumen of the outer needle and moveable beyond the distal end of the outer needle, the solid inner needle comprising a first material and further comprising;

    a proximal portion;

    a distal portion having a proximal section that is more flexible than the proximal portion, the distal portion increasing in flexibility from the proximal section to a distal end and includes a sharp tip configured to pierce the atrial septum; and

    an intermediate portion that is substantially straight, is more flexible than the proximal section of the distal portion, and has a circumference substantially equal to or greaterthan that of the proximal section of the distal portion, wherein the intermediate portion includes a second material that is different from the first material.

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