Methods, systems, and devices for resizable intra-atrial shunts
Inventors
McNamara, Edward I. • Sutherland, Michael W. • Finch, Matthew J. • Forcucci, Stephen J.
Assignees
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Publication Number
US-10376680-B2
Publication Date
2019-08-13
Expiration Date
Abstract
Devices and methods for treating heart disease by normalizing elevated blood pressure in the left and right atria of a heart of a mammal are disclosed. Devices may include an adjustable hydraulic diameter and/or a removable and/or replaceable shunt portion. Devices may include absorbable materials, the absorption of which directly or indirectly causes alterations of the fluid flow capacities the devices.
Core Innovation
The invention provides an expandable device adapted for percutaneous delivery into a membrane of a patient's heart. The device includes first and second anchors configured to contact first and second sides of the membrane, and a retainer interconnecting the anchors to permit blood to flow across the membrane at a first flow rate.
The device further includes a shunt that is removably attachable to the retainer, where the shunt is receivable within the retainer so that blood can be conducted across the membrane at a second flow rate. The shunt is configured to be percutaneously delivered to the retainer after implantation of the retainer, enabling conductance at a different flow rate after the initial device placement.
The shunt comprises a frame with at least one aperture associated with a flap releasably secured in place with a bio-resorbable material so as to partially close the aperture. By releasing the flap from the aperture using the bio-resorbable material, the aperture can be partially closed or opened, thereby enabling resizing of the effective flow path to conduct blood across the membrane at the second flow rate.
Claims Coverage
The independent claims recite 3 inventive features centered on an expandable, percutaneously delivered cardiac membrane device with anchors and a retainer permitting a first flow rate, a removably attachable shunt delivering a second flow rate, and a shunt aperture arrangement with bio-resorbable, releasably secured flaps that partially close the aperture.
Expandable device with anchors and retainer for a first flow rate
An expandable device adapted for percutaneous delivery into a membrane of a patient's heart, comprising first and second anchors adapted to contact a first side and a second side of the membrane, and a retainer interconnecting the first and second anchors to permit blood to flow across the membrane at a first flow rate.
Removably attachable shunt for a second flow rate
A shunt removably attachable to the retainer, receivable within the retainer to enable blood to flow across the membrane at a second flow rate, and configured to be percutaneously delivered to the retainer after implantation of the retainer into the membrane of the patient's heart.
Frame aperture partially closed by releasably secured flap
The shunt comprises a frame having at least one aperture associated with a flap releasably secured in place with a bio-resorbable material so as to partially close the aperture.
The claim coverage centers on an expandable percutaneously delivered membrane device that uses a retainer for an initial first flow rate and allows subsequent percutaneous delivery of a removably attachable shunt to achieve a second flow rate, with the shunt including a frame, an aperture, and a bio-resorbable, releasably secured flap.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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