Prosthetic valve delivery system
A delivery system for delivering a spiral anchor to a diseased native valve of a heart includes an anchor control catheter and an anchor guide extending from the anchor control catheter. The anchor guide includes a flexible configuration and a rigid configuration. The anchor guide in the rigid configuration includes a proximal section, a middle section, and a distal section. The proximal section includes a straight central axis and extends from the anchor control catheter, the middle section spirals axially and radially outwards from the central axis, and the distal section curves concentrically about the central axis in a plane that is perpendicular to the central axis.
1. A delivery system for delivering a spiral an anchor to a diseased native valve of a heart, comprising:
an anchor control catheter; and
an anchor guide extending from the anchor control catheter, the anchor guide comprising a flexible configuration with an elongate delivery geometry and a rigid configuration with a curved deployed geometry, the anchor guide in the rigid configuration comprises a proximal section, a middle section, and a distal section, wherein the proximal section comprises a straight central axis and extends from the anchor control catheter, the middle section spirals axially and radially outwards from the straight central axis, and the distal section curves concentrically about the straight central axis in a plane that is perpendicular to the straight central axis, wherein the anchor guide is shape-set to assume an intermediate configuration that has an intermediate geometry that is between the elongate delivery geometry and the curved deployed geometry.
2. The delivery system of claim 1 , wherein the anchor guide comprises a plurality of cuts configured to define a shape of the anchor guide in the rigid configuration.
3. The delivery system of claim 2 , wherein the plurality of cuts comprises window cuts, interlocking spiral cuts, or toothed wedge cuts.
4. The delivery system of claim 1 , further comprising one or more actuation elements configured to actuate the anchor guide from the flexible configuration to the rigid configuration.
5. The delivery system of claim 4 , wherein the one or more actuation elements comprises a nested concentric shaft mechanism or one or more pullwires or cables.
6. The delivery system of claim 1 , wherein the anchor guide comprises a shape memory material.
7. The delivery system of claim 1 , wherein the anchor guide comprises a central channel configured to hold the anchor therein.
8. The delivery system of claim 7 , wherein the anchor guide is configured to deflect the anchor positioned within the central channel when the anchor guide is transitioned from the flexible configuration to the rigid configuration.
9. The delivery system of claim 8 , wherein the anchor guide is configured to position the anchor concentrically relative to a central axis of the anchor control catheter.
10. The delivery system of claim 1 , wherein the anchor guide in the flexible configuration is configured to be positioned within a delivery sheath.