Apparatus for percutaneously creating native tissue venous valves
Percutaneous apparatus for forming a bicuspid venous valve from autologous tissue are disclosed. A multilumen catheter is disclosed that includes a delivery shaft positioned on either side of the balloon. When the balloon is inflated within the vein at a treatment location where a bicuspid valve is to be created, the delivery shafts are pressed into the wall of the vein by the inflated balloon so that exit ports in the delivery shafts are at diametrically opposed locations. The delivery shafts may than be used to deliver puncture elements through the exit ports and into the vessel wall to gain access to a subintimal layer of the vein wall. In this manner, the inventive multilumen catheter aids in making properly positioned flaps of venous tissue for creating a bicuspid venous valve from autologous tissue.
1. A catheter for creating a bicuspid venous valve from autologous tissue, the catheter comprising:
an elongate catheter shaft having a proximal end and a distal end and defining an inflation lumen and proximal portions of first and second delivery lumens;
a balloon extending from the distal end of the catheter shaft and having an interior fluidly coupled to the inflation lumen;
a first delivery shaft defining a distal portion of the first delivery lumen with a first distal port for accessing the first delivery lumen, the first delivery shaft being coupled to the distal end of the catheter shaft such that the proximal portion of the first delivery lumen is connected to the distal portion of the first delivery lumen, wherein a proximal end of the first delivery shaft is directly attached to a proximal end of the balloon and a distal end of the first delivery shaft is directly attached to a distal end of the balloon such that a first delivery shaft portion extending between the attached proximal and distal ends thereof is detached from the balloon and wherein the first distal port is an opening in a sidewall proximal of the distal end of the first delivery shaft; and
a second delivery shaft defining a distal portion of the second delivery lumen with a second distal port for accessing the second delivery lumen, the second delivery shaft being coupled to the distal end of the catheter shaft such that the proximal portion of the second delivery lumen is connected to the distal portion of the second delivery lumen, wherein a proximal end of the second delivery shaft is directly attached to the proximal end of the balloon and a distal end of the second delivery shaft is directly attached to the distal end of the balloon such that a second delivery shaft portion extending between the attached proximal and distal ends thereof is detached from the balloon and wherein the second distal port is an opening in a sidewall proximal of the distal end of the second delivery shaft,
wherein the first delivery shaft longitudinally extends along one side of the balloon and the second delivery shaft longitudinally extends along the opposite side of the balloon such that the first and second distal ports are positioned on a working length of the balloon approximately 180 degrees apart.
2. The catheter of claim 1 , further comprising:
a first puncture device positioned within the first delivery lumen with a distal end of the first puncture device being located adjacent the first distal port; and
a second puncture device positioned within the second delivery lumen with a distal end of the second puncture device located adjacent the second distal port.
3. The catheter of claim 2 , wherein the first and second puncture devices are selected from a group consisting of guidewires with sharpened distal tips, needles, sharpened mandrels, and mini trocars.
4. The catheter of claim 1 , wherein the first and second delivery shafts are made from polyethylene tubing.