Devices, systems, and methods for reshaping a heart valve annulus
Anchors for securing an implant within a body organ and/or reshaping a body organ are provided herein. Anchors are configured for deployment in a body lumen or vasculature of the patient that are curved or conformable to accommodate anatomy of the patient. Such anchors can include deformable or collapsible structures upon tensioning of a bridging element in a lateral direction, or segmented tubes that can be adjusted by tightening of one or more tethers extending therethrough. Such anchors can be used as a posterior anchor in a blood vessel in implant systems having a tensioned bridging element extending between the posterior anchor and an anterior anchor deployed at another location within or along the body organ. Methods of deploying such anchors, and use of multiple anchors or multiple bridging elements to a single anchor are also provided.
1. A method of anchoring an implant and reshaping a body organ of a patient, the method comprising:
delivering and deploying an anterior anchor within a desired location along or within an organ of a patient;
delivering a posterior anchor within a vasculature of the patient adjacent the body organ, the posterior anchor being conformable to an anatomy of the patient upon deployment of the posterior anchor, wherein the posterior anchor is a cylindrical body that is laterally deformable or collapsible and has a substantially rigid backbone attached to the cylindrical body;
delivering a first bridging element that extends across a chamber of the organ between the anterior anchor and the posterior anchor so as to attach the anterior anchor with the posterior anchor with the first bridging element penetrating through a tissue against which the posterior anchor is engaged when the implant is deployed; and
conforming the posterior anchor to a desired shape to accommodate the anatomy of the patient by tensioning the first bridging element while interfaced with the posterior anchor and the anterior anchor, wherein tensioning the first bridging element comprises shortening the first bridging element to maintain a desired spacing between the anterior anchor and the posterior anchor so as to reshape the body organ by engagement of the conformed posterior anchor, wherein conforming the posterior anchor comprises tensioning the first bridging element while attached to the substantially rigid backbone so as to deform or collapse the cylindrical body.
2. The method of claim 1 , wherein the cylindrical body is a compressible foam material and the substantially rigid backbone is disposed within or on the cylindrical body.
3. The method of claim 1 , wherein the cylindrical body is an expandable scaffold that includes folding zones extending longitudinally and offset from the substantially rigid backbone,
wherein conforming the posterior anchor comprises laterally collapsing the scaffold by folding the scaffold along the folding zones while tensioning the bridging element attached to the substantially rigid backbone.
4. The method of claim 1 , wherein the cylinder is an expandable scaffold, the method further comprising:
delivering the scaffold in a radially compressed configuration via a guidewire or catheter; and
radially expanding the scaffold within the vasculature before laterally collapsing the scaffold.
5. The method of claim 1 , wherein the posterior anchor comprises a segmented tube having a plurality of segments and the first bridging element comprises a first tether attached to a first end of the segmented tube and exits the segmented tube along a central portion thereof;
wherein shortening the first bridging element comprises shortening the first tether thereby curving a portion of the segmented tube between the first end and the central portion.
6. The method of claim 5 , further comprising:
wherein conforming the posterior anchor comprises shortening a second tether extending from a second opposite side of the segmented tube and exiting the segmented tube along the central portion thereof thereby curving another portion of the segmented tube between the second end and the central portion.
7. The method of claim 5 , wherein the bridging element extends directly between a first end of the segmented tube and the anterior anchor and a second opposite end of the segmented tube is attached to the anterior anchor by a second bridging element, the method further comprising:
wherein conforming the posterior anchor comprises shortening the second bridging element so as to place the second bridging element under tension, wherein tensioning the first and second bridging elements under tension curves the segmented tube so as to conform to anatomy against which the posterior anchor is engaged.
8. The method of claim 5 , wherein the posterior anchor comprises a segmented tube having a plurality of segments, wherein the first bridging element comprises a tether passed longitudinally through the segmented tube and exiting at or near opposite ends of the segmented tube,
wherein shortening the bridge portion comprises shortening the tether thereby drawing opposite ends of the segment tube inward so as to curve the posterior anchor.
9. The method of claim 1 , wherein the posterior anchor comprises a string of interfacing elements with one or more tethers extending through the interfacing elements and attach and attached to the first bridging element, the interfacing elements being formed of any suitable material and shape,
wherein shortening the first bridging element comprises shortening the one or more tethers thereby curving at least a portion of the string of interfacing elements.
10. The method of claim 1 , wherein the entire implant is delivered and deployed intravascularly.