Patent ID: 8992556
Filing Date: 2015-03-31
Classification: A61B

Abstract:
1. A transseptal puncture device for puncturing the atrial septum of a patient, comprising: a solid inner needle configured for placement within a lumen of a needle configured to transverse the septum and moveable beyond the distal end of the needle, the solid inner needle including a proximal portion, an intermediate portion, and a distal portion; wherein the solid inner needle is formed substantially of Nitinol; wherein the intermediate portion is more flexible than the proximal portion and has a circumference equal to that of the proximal portion; wherein the distal portion is generally curved, is more flexible than the proximal portion, and includes a tip configured to pierce the atrial septum; and wherein the distal portion has sufficient stiffness such that it is configured to penetrate the atrial septum when the distal portion substantially resides within the needle and has insufficient stiffness such that it is configured to not penetrate cardiac tissue when the distal portion resides substantially outside of the needle.