SINGLE PASS LARGE BORE TRANSSEPTAL CROSSING
A transseptal crossing system can have a sheath and an elongate tubular body. The tubular body can include an electrically conductive sidewall defining a central lumen and a distal end section. The central lumen may be configured to receive a guidewire and to permit at least a portion of the guidewire to extend through a distal opening of the electrically conductive sidewall. The distal end section can comprise a distal end surface in electrical communication with the electrically conductive sidewall. The distal end surface includes a first section being positioned generally perpendicular to a longitudinal axis of the elongate tubular body and a second section being positioned at a non-orthogonal angle relative to the longitudinal axis of the elongate tubular body. At least one of the first section or the second section may be configured to deliver energy to a target tissue.
1 . A transseptal crossing system comprising:
a sheath comprising an elongate tubular sheath body having a sheath lumen extending through the sheath body; and
an elongate tubular body comprising:
an electrically conductive sidewall defining a central lumen, the central lumen being configured to receive a guidewire and to permit at least a portion of the guidewire to extend through a distal opening of the electrically conductive sidewall; and
a distal end section comprising a distal end surface being in electrical communication with the electrically conductive sidewall, the distal end surface comprising:
a first section being positioned generally perpendicular to a longitudinal axis of the elongate tubular body; and
a second section being positioned at a non-orthogonal angle relative to the longitudinal axis of the elongate tubular body,
wherein at least one of the first section or the second section is configured to deliver energy to a target tissue.
2 . The transseptal crossing system of claim 1 , wherein the first section of the distal end surface comprises a length of at least about 20% of a diameter of the distal end section of the elongate tubular body.
3 . The transseptal crossing system of claim 1 , wherein a length of the first section is at most about 50% of a diameter of the distal end section of the elongate tubular body.
4 . The transseptal crossing system of claim 1 , wherein a length of the first section is between about 25% and about 30% of a diameter of the distal end section of the elongate tubular body.
5 . The transseptal crossing system of claim 1 , wherein the non-orthogonal angle of the second section is at least about 30°.
6 . The transseptal crossing system of claim 1 , wherein the non-orthogonal angle of the second section is at most about 70°.
7 . The transseptal crossing system of claim 1 , wherein the non-orthogonal angle of the second section is between about 40° and about 50°.
8 . The transseptal crossing system of claim 1 , wherein the first section comprises a first material, wherein the second section comprises a second material, and wherein the first material has a first conductive property different than a second conductive property of the second material.
9 . The transseptal crossing system of claim 8 , wherein the first material comprises a coating on the first section.
10 . The transseptal crossing system of claim 8 , wherein the second material comprises a coating on the second section.
11 . The transseptal crossing system of claim 1 further comprising a dilator being configured to be positioned through the sheath lumen, the dilator having a dilator lumen extending through a dilator body and being configured to receive the elongate tubular body.
12 . The transseptal crossing system of claim 1 further comprising a tubular insulation layer surrounding the electrically conductive sidewall and leaving the distal end section exposed.
13 . A transseptal crossing system comprising:
a sheath comprising an elongate tubular sheath body having a sheath lumen extending through the sheath body; and
an elongate tubular body comprising:
an electrically conductive sidewall defining a central lumen, the central lumen being configured to receive a guidewire and to permit at least a portion of the guidewire to extend through a distal opening of the electrically conductive sidewall; and
a distal end section comprising a distal end surface being in electrical communication with the electrically conductive sidewall, the distal end surface comprising:
a first material comprising a first conductive property; and
a second material comprising a second conductive property, the second conductive property being different than the first conductive property,
wherein at least a portion of the distal end section is configured to deliver energy to a target tissue.
14 . The transseptal crossing system of claim 13 , wherein the first material comprises a coating on a portion of the distal end surface.
15 . The transseptal crossing system of claim 13 , wherein the first material comprises gold.
16 . The transseptal crossing system of claim 13 further comprising a dilator being configured to be positioned through the sheath lumen, the dilator having a dilator lumen extending through a dilator body and being configured to receive the elongate tubular body.
17 . The transseptal crossing system of claim 13 further comprising a tubular insulation layer surrounding the electrically conductive sidewall and leaving the distal end section exposed.