Asymmetric external support for stabilizing a vein graft used in a coronary arterial bypass graft (CABG) procedure, and applications thereof
Inventors
Assignees
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Publication Number
US-11291565-B1
Publication Date
2022-04-05
Expiration Date
Abstract
Asymmetric external support for stabilizing vein grafts used in coronary arterial bypass graft (CABG) procedures, and applications thereof. Includes: tubular wire braided mesh longitudinally extending proximally and distally, configured with non-paired elastic wires and paired plastically deformable wires. Elastic wires extend along support full length. Paired plastically deformable wires proximal ends are non-connected and open. Plastically deformable wires extend less than support full length, and are configured with inter-looped distal end portions (loops) proximally longitudinally offset from support distal end, and outwardly radially extending beyond support outer radius. Loops may be individually secured, via loop closure securing procedures. In CABG procedures, support externally covers vein grafts, whereby support distal portion (with longitudinally offset loops) is positionable at coronary artery anastomosis sites, and support proximal end is positionable at other anastomosis sites. Eliminates, or minimizes, plastically deformable wires from injuring heart or/and vascular tissue in vicinity of coronary artery anastomosis sites.
Core Innovation
The invention is an asymmetric external support for stabilizing a vein graft used in a coronary arterial bypass graft procedure. The support comprises a tubular wire mesh with proximal, middle, and distal portions and wire mesh proximal and distal ends, configured with non-paired elastic wires and paired plastically deformable wires.
The non-paired elastic wires longitudinally extend along the full longitudinal length of the wire mesh and have proximal and distal ends coincident with the wire mesh proximal and distal ends. In the proximal portion, proximal ends of all the paired plastically deformable wires are non-connected and open.
In the distal portion, the paired plastically deformable wires are configured with inter-looped distal end portions so that each pair includes a first wire distal end portion formed as a first wire closed loop inter-looped with a second wire distal end portion formed as a second wire closed loop. The paired plastically deformable wires longitudinally extend along less than the full longitudinal length of the wire mesh, whereby apexes of all the inter-looped distal end portions are proximally longitudinally offset from, and not coincident with, the wire mesh distal end.
During the coronary arterial bypass graft procedure, the asymmetric external support is externally applicable to cover the vein graft such that the wire mesh distal end is positionable at a coronary artery anastomosis site and the wire mesh proximal end is positionable at another anastomosis site. The offset and asymmetric geometry place the distal closed-loop portions away from the coronary artery anastomosis site while still allowing the proximal end to be positioned at the other anastomosis site.
Claims Coverage
The independent claim is clm-00001 and includes six inventive features.
Asymmetric tubular wire mesh external support with elastic and plastically deformable wire sets
A tubular wire mesh longitudinally extending proximally and distally with wire mesh proximal, middle, and distal portions, and wire mesh proximal and distal ends, configured with non-paired elastic wires and paired plastically deformable wires.
Full-length non-paired elastic wires coincident with mesh ends
Non-paired elastic wires longitudinally extend along the full longitudinal length of the wire mesh, whereby proximal and distal ends of the elastic wires coincide with the wire mesh proximal and distal ends, respectively.
Proximal paired plastically deformable wire ends are non-connected and open
The wire mesh proximal portion has proximal ends of all the paired plastically deformable wires being non-connected and open.
Distal paired plastically deformable inter-looped closed-wire loops
The wire mesh distal portion has the paired plastically deformable wires configured with inter-looped distal end portions, whereby each pair of the plastically deformable wires has a first wire with a first wire distal end portion formed as a first wire closed loop that is inter-looped with a second wire distal end portion formed as a second wire closed loop of a second wire.
Proximally offset loop apexes relative to wire mesh distal end
Paired plastically deformable wires longitudinally extend along less than the full longitudinal length of the wire mesh, whereby apexes of all the inter-looped distal end portions are proximally longitudinally offset from, and not coincident with, the wire mesh distal end.
Externally applicable positioning at coronary and other anastomosis sites
In the coronary arterial bypass graft procedure, the asymmetric external support is externally applicable upon, to cover, the vein graft such that the wire mesh distal end is positionable at a coronary artery anastomosis site, and the wire mesh proximal end is positionable at an other anastomosis site.
Overall, the claim coverage centers on an asymmetric tubular wire mesh having a full-length non-paired elastic wire framework combined with a distal paired plastically deformable loop structure with apexes proximally longitudinally offset from the wire mesh distal end, enabling distinct placement of the distal and proximal ends at a coronary artery anastomosis site and another anastomosis site, respectively.
Stated Advantages
Reduce risk of heart or vascular tissue injury by positioning the wire mesh distal end and its offset distal loop portions relative to the coronary artery anastomosis site.
Documented Applications
Stabilizing a vein graft used in a coronary arterial bypass graft procedure, with the wire mesh distal end positionable at a coronary artery anastomosis site and the wire mesh proximal end positionable at another anastomosis site.
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