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Publication Number
US-10548732-B2
Publication Date
2020-02-04
Expiration Date
Abstract
Embodiments of the present disclosure include a device for repositioning papillary muscles. The device may comprise a band configured to encircle a cluster of papillary muscles. The cluster of papillary muscles may have an outer peripheral boundary defined by the encircling band, and the band may comprise a first end and a second end. The device may further comprise an adjustable clasp coupled to a location proximate the first end of the band. The clasp may be configured to transition from an open configuration to a closed configuration to connect the second end of the band to the first end of the band, thereby forming a loop. The clasp may be selectively actuatable to adjust a length of the loop.
Core Innovation
The invention relates to an adjustable self-locking papillary-movement cardiac device in which a loop-forming band is configured to form a loop within a heart. The band defines a lumen extending at least partially therethrough along an elongated axis of the band, and the band includes a first end and a second end configured to be received within the lumen via a first opening in the first end, with a side wall opening between the first end and the second end that provides access to the lumen.
An actuatable clasp transitions from an open configuration to a closed configuration for forming a fixed length loop after the second end is inserted into the first end. The clasp is configured for actuation via a catheter passing through the side wall opening, and the actuatable clasp is held in the open configuration by a clasp retainer associated with the clasp. Retraction of the clasp retainer results in the clasp returning to its closed configuration.
In embodiments, the clasp and band provide selectively actuatable loop length adjustment, including an adjustable loop length adjustable over at least 8 mm. The band can be configured to encircle a cluster of papillary muscles such that band contact is limited to an outer peripheral boundary while leaving an inner region devoid of band material. The band may be routed through trabecular spaces between papillary muscles and a ventricular wall.
Claims Coverage
The independent claims cover a cardiac loop-forming device with a lumened band and a catheter-actuatable clasp that transitions open-to-closed to form a fixed length loop. Across the independent claims, the core inventive features include catheter actuation through a side wall opening, clasp retention with self-return upon retainer retraction, and selectively actuatable loop length adjustment; additional inventive features include grasping or locking mechanisms and papillary-movement-oriented band contact constraints.
Loop-forming band with lumen and side wall access
A band configured to form a loop within a heart, the band defining a lumen extending at least partially therethrough along an elongated axis of the band, wherein the band includes a first end and a second end received within the lumen via a first opening in the first end, and a side wall opening between the first end and the second end providing access to the lumen.
Catheter-actuatable open-to-closed clasp to form fixed length loop
An actuatable clasp configured to transition from an open configuration to a closed configuration for forming a fixed length loop after the second end is inserted into the first end, wherein the clasp is configured for actuation via a catheter passing through the side wall opening.
Clasp retainer held-open configuration with self-return on retraction
The actuatable clasp is held in the open configuration by a clasp retainer associated with the clasp, wherein retraction of the clasp retainer from the clasp results in the clasp returning to its closed configuration.
Selectively actuatable clasp for loop length adjustment
The clasp is selectively actuatable to enable adjustment of a length of the loop.
Radially inward spikes grasping and locking in closed configuration
The actuatable clasp includes a plurality of radially inward protruding spikes that, when in its closed configuration, grip the band between the spikes and enable locking when closed.
Papillary-muscle encircling with outer boundary contact and inner region exclusion
An encircling loop that surrounds a cluster of papillary muscles and defines an outer peripheral boundary and an inner region, wherein the band pulls the papillary muscles together so the band contacts only the outer peripheral boundary without contacting the inner region, leaving the inner region free of any band portion.
Band routing through trabecular spaces between papillary muscles and ventricle wall
The band is configured to be routed through multiple spaces among trabeculae between the papillary muscles and a ventricle wall.
Directional passage control using graspable elements near second end
The band includes a plurality of graspable elements proximate the second end of the band that form protrusions between which the clasp locks when in its closed configuration, wherein the graspable elements are configured for passage through the clasp in both a first direction and a second direction opposite the first direction when the clasp is in its open configuration, and are configured to prevent passage through the clasp in the second direction when the clasp is in its closed configuration.
Across the independent claims, the inventive subject matter centers on a loop-forming, lumened band with side wall access for catheter-based actuation of an actuatable clasp. The clasp is retained open by a clasp retainer and returns to closed upon retainer retraction to form a fixed length loop, with one independent claim further requiring that the clasp is selectively actuatable to adjust loop length. Additional inventive features disclosed include radially inward spike grasping and locking, papillary-movement contact constraints, routing through trabecular spaces, and directional passage control using clasp-locked graspable elements near the band’s second end.
Stated Advantages
Documented Applications
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