Devices, systems, and methods for reshaping a heart valve annulus, including the use of magnetic tools
View Patent ↗Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial retrievability. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize a bridge stop to secure the implant, and the methods of implantation employ various tools.
1. An implant system comprising
a first catheter, comprising a first catheter body sized and configure for axial advancement over a guide wire, the first catheter body including a guide wire lumen and an auxiliary lumen independent of the guide wire lumen, said first catheter including an elongated shaft having a distal end, and a first head carried at the distal end in which the distal opening is formed, wherein the first head includes magnetic or ferromagnetic materials,
a second catheter, comprising a second catheter body sized and configure for axial advancement over a guide wire, the second catheter body including a distal end and an inner lumen, said second catheter including a second head and a lumen extension that communicates with the inner lumen of the second catheter body, wherein the second head includes magnetic or ferromagnetic materials
wherein each of the first and the second heads includes a distal magnetic portion, a center magnetic portion and a proximal magnetic portion
wherein each of the distal magnetic portion has a first end and a second end, the first end having a first magnetic polarity and the second end having a second opposite magnetic polarity;
each of the center magnetic portion has a first end and a second end, the first end having a first magnetic polarity and the second end having a second opposite magnetic polarity;
each of the proximal magnetic portion has a first end and a second end, the first end having a first magnetic polarity and the second end having a second opposite magnetic polarity; and
the magnetic polarity of each of the first ends of the distal magnetic portion, the center magnetic portion and the proximal magnetic portion is the same
wherein each of the distal magnetic portion is arranged such that the first end is adjacent the center magnetic portion; and
the proximal magnetic portion is arranged such that the first end is adjacent the center magnetic portion
whereby distal region of the second head will magnetically couple to the middle region of the first head to place the lumen exit opening at a distal end of the second head in an alignment with the auxiliary lumen exit at the middle region of the first head, thereby accommodating passage of an operative component between the first and second catheters.
2. A system according to claim 1
wherein each of the heads includes opposite first and second side surfaces,
wherein each the distal opening for each of the heads is formed on the first side surface of the head, and
wherein each of the center magnetic portion is arranged such that the first end is located on the first side surface of the head.
3. A system according to claim 1
wherein the operative component comprises a first guide wire.
4. A system according to claim 3
wherein the first guide wire has a first stretched configuration and a second unstretched configuration.
5. A system according to claim 4
wherein the first guide wire is configured to adopt a coiled configuration when the first guide wire is in its unstretched configuration.
6. A system according to claim 3
wherein the first catheter distal opening includes a ramped portion, said ramped portion being sized and configured to guide the first guide wire into the second catheter distal opening.
7. A system according to claim 3
wherein the second catheter distal opening is formed with a funnel, said funnel being sized and configured to receive the first guide wire from the first catheter distal opening.
8. A system according to claim 1
wherein the distal end of the first catheter head is sized and configured for rotation relative to the elongated shaft.
9. A system according to claim 8
wherein a first retaining structure is coupled to the first catheter head and a second retaining structure is coupled to the elongated shaft, the first retaining structure being engagable with the second structure to limit the rotation of the first catheter head relative to the elongated shaft.
10. A system according to claim 9
wherein the first retaining structure comprises a pin and the second retaining structure comprises a plate including a partial circumferential slot.
11. A method comprising
providing an implant system as defined in claim 1 ,
deploying the first and second catheters,
magnetically coupling the distal opening of the first catheter to the distal opening of the second catheter, and
passing a operative component between the guide lumens of the first and second catheters.