Patent ID: 8128573
Filing Date: 2012-03-06
Classification: A61B,A61M

Abstract:
1. An apparatus for performing transseptal catheterization comprising: a sheath defining a sheath lumen and having a distal end; a dilator removably insertable into the sheath lumen, the dilator defining a dilator lumen and having a distal end, wherein the dilator is longer than the sheath such that the distal end of the dilator may protrude beyond the distal end of the sheath when the dilator is inserted into the sheath lumen; a transseptal needle removably insertable into and through the dilator lumen to an extent that a tip of the transseptal needle may protrude beyond the distal end of the dilator in order to puncture the interatrial septum; and means for measuring electrophysiological activity adjacent the distal end of the dilator and locating the fossa ovalis therefrom, wherein each of the sheath, the dilator, and the transseptal needle are navigable through a patient's vasculature, and wherein the means for measuring electrophysiological activity adjacent the distal end of the dilator and locating the fossa ovalis therefrom comprises means for measuring reduced signal slew rate.