Patent ID: 9107693
Filing Date: 2015-08-18
Classification: A61B

Abstract:
1. A medical device adapted for controlled penetration into an intra-pericardial space between a pericardial sac and a heart surface, the medical device comprising: an outer sheath comprising a proximal end, a distal end, and a lumen extending between the proximal end and the distal end; an inner sheath extending through the lumen of the outer sheath, the inner sheath comprising a distal portion adapted to pierce the pericardial sac; wherein the distal portion of the inner sheath comprises helical spiral threads having a cutting surface, the cutting surface adapted to cut the pericardial sac as the inner sheath is axially rotated to longitudinally displace the inner sheath relative to the outer sheath; and a nose shaft adapted to displace relative to a distal edge of the distal portion of the inner sheath, wherein longitudinally displacing the distal portion of the inner sheath relative to the outer sheath until the nose shaft displaces relative to the distal edge provides controlled penetration into the intra-pericardial space; wherein a distal tip of the nose shaft retracts into the distal edge of the distal portion of the inner sheath when met with resistance from the pericardial sac as the inner sheath is displaced longitudinally; and wherein the distal tip of the nose shaft is spring loaded so as to remain protruding from the distal portion of the inner sheath until met with resistance, and wherein the distal tip of the nose shaft includes an opening defined therein and through which a guidewire can extend into the intra-pericardial space from within the nose shaft.