PFO device
A medical device for treating a PFO is presented as well as a mechanism for its delivery, repositioning and/or removal. The device includes a wire or cable framework of six shape-memory cables formed into a right side having six loops that support a right side sail and a left side having six loops that support a left side sail. The right side loops and left side loops are connected together via waist members that extend between the right side and left side loops. Each cable is threaded through a through hole of a central post and pass through one of each of four types of connecting collars that establish the basic shape of the PFO device and retain the cables together to form a flexible and resilient PFO device.
1. A self-expanding Patent Foramen Ovale (PFO) device having a confined state and an expanded state, and having a left side and a right side and a waist region therebetween, the device comprising:
a central post, a plurality of cables, a plurality of collars, a left sail and a right sail,
the central post being located on the right side, the central post defining a plurality of through holes, the plurality of through holes being equal to the plurality of cables, each of the plurality of cables passing through one of the plurality of through holes,
each of the plurality of cables having a pair of ends,
the left sail and the right sail each having a periphery,
the plurality of collars being divided into a first group of collars, a second group of collars, a third group of collars, and a fourth group of collars,
each of the plurality of cables passing through at least one collar of the first group of collars, at least one collar of the second group of collars, at least one collar of the third group of collars, and at least one collar of the fourth group of collars, to form six loops on the right side, six loops on the left side and six waist members extending between the six loops on the right side and the six loops on the left side;
each collar of the first group of collars connecting two of the plurality of cables along the periphery of the right sail to form one of the six loops on the right side;
each collar of the second group of collars connecting two of the plurality of cables at the waist region to form one of the six waist members;
each collar of the third group of collars connecting two of the plurality of cables along the periphery of the left sail to form one of the six loops on the left side;
each collar of the fourth group of collars connecting the pair of free ends of one of the plurality of cables.
2. The PFO device of claim 1 , wherein in the confined state the device is configured to be folded into the interior of a catheter assembly.
3. The PFO device of claim 2 , wherein the plurality of cables are constructed of a plurality of strands of shape memory material.
4. The PFO device of claim 3 , wherein the shape memory material is nitinol.
5. The PFO device of claim 4 , wherein at least one of the right sail and left sail are constructed of medical grade polyester.
6. The PFO device of claim 5 , wherein the left sail completely covers the six loops on the left side.
7. The PFO device of claim 5 , wherein the right sail is interwoven between the cables of the six loops on the right side.
8. The PFO device of claim 1 , wherein the right side and left side have a diameter greater than the waist region.
9. The PFO device of claim 8 , wherein the left side has a diameter less than the diameter of the right side.