Systems and methods for percutaneous intravascular access and guidewire placement
A device for allowing passage of a guidewire from a primary blood vessel to an adjacent secondary blood vessel includes a main body having a primary lumen and a secondary lumen, and a piercing member disposed in the secondary lumen, and configured to be moved distally out of the secondary lumen, and to pierce through tissue while being distally moved. A third lumen located within the piercing member is configured to allow placement of a guidewire from the primary blood vessel to the adjacent secondary blood vessel. In one embodiment, the secondary lumen is configured to allow articulation of the distal end of the piercing element. The piercing member has a sharp point on one end to facilitate cutting a small communicating aperture from the primary blood vessel to the secondary blood vessel.
1. A device for creating intravascular access and guidewire placement, comprising:
a main body having a lumen;
a piercing member disposed in said lumen, and configured to be moved distally out of said lumen and to pierce through tissue while being distally moved;
a handle attached to said main body and having an actuator for moving said piercing member;
a guide for guiding the piercing member, the guide having a distal end from which the piercing member is extendable, the guide comprising an atraumatic distal tip having blunt walls with a thickness substantially greater than a thickness of walls defining the guide which are proximal to the atraumatic distal tip; and
a guidewire disposed in said lumen for delivery into a desired site from a distal end of said lumen.
2. The device as recited in claim 1 , wherein the piercing member has a sharp point on one end thereof.
3. The device as recited in claim 2 , wherein the piercing member is retractable into the lumen.
4. The device as recited in claim 3 , wherein said actuator comprises a slide.
5. The device as recited in claim 2 , wherein said sharp point comprises a lancet point and primary bevels.
6. The device as recited in claim 1 , wherein said atraumatic distal tip is comprised of a polymer material.
7. The device as recited in claim 1 , wherein said atraumatic distal tip comprises radiopaque materials.
8. The device as recited in claim 7 , wherein the radiopaque materials comprise a plurality of coils constructed of a radiopaque material.
9. The device as recited in claim 1 , and further comprising a second lumen within the piercing member, the guidewire being disposed in the second lumen.
10. The device as recited in claim 9 , and further comprising a third lumen within said main body, outwardly of the first lumen.
11. The device as recited in claim 10 , wherein the third lumen is defined by said guide which has shape memory properties, the guide being actuatable to a curved orientation by adjustment of a position of the main body to create an incrementally adjustable radius of curvature on the guide.
12. The device as recited in claim 11 , wherein the piercing member has shape memory properties, and is actuatable to create an incrementally adjustable radius of curvature.
13. The device as recited in claim 11 , and further comprising a second actuator on said handle for actuating the guide to a curved orientation.
14. The device as recited in claim 13 , wherein said second actuator comprises a rotatable knob.
15. A device for creating intravascular access and guidewire placement, comprising:
a main body having a lumen, the lumen being defined by a guide having an atraumatic distal tip having blunt walls with a thickness substantially greater than a thickness of walls defining the guide which are proximal to the atraumatic distal tip;
a piercing member disposed in said lumen, and configured to be moved distally out of said lumen and to pierce through tissue while being distally moved;
a handle attached to said main body and having an actuator for moving said piercing member;
a guidewire disposed in said lumen for delivery into a desired site from a distal end of said lumen;
wherein said atraumatic distal tip is comprised of a polymer material.
16. The device as recited in claim 15 , wherein said atraumatic distal tip comprises radiopaque materials.
17. The device as recited in claim 16 , wherein the radiopaque materials comprise a plurality of coils constructed of a radiopaque material.
18. A device for creating intravascular access and guidewire placement, comprising:
a main body having a lumen, the lumen being defined by a guide having an atraumatic distal tip;
a piercing member disposed in the lumen, and configured to be moved distally out of the lumen and to pierce through tissue while being distally moved;
a handle attached to the main body and having an actuator for moving the piercing member;
a guidewire disposed in the lumen for delivery into a desired site from a distal end of the lumen;
wherein the atraumatic distal tip comprises a plurality of coils constructed of a radiopaque material.