Apparatus and methods to create and maintain an intra-atrial pressure relief opening
AssigneeCorvia Medical, Inc.
InventorsDavid Celermajer, Edward McNamara, Michael W. Sutherland, Hiroatsu Sugimoto
Life of this patent
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Abstract
The present disclosure relates to a method and a device for treating heart failure by normalizing elevated blood pressure in the left and right atria of a heart of a mammal. The present disclosure includes methods for creating and maintaining an opening in the atrial septum. Tools for making an opening and enlarging the opening are also disclosed. Use of the techniques and tools described herein prolongs the patency of an intra-atrial pressure relief opening.
Claims12
A device for treating heart failure, the device comprising:
- a penetrator for penetrating an atrial septum between a right atrium and a left atrium of a heart of a patient by creating an opening in the atrial septum;
- a tissue retaining device extending over the penetrator, wherein the tissue retaining device has a plurality of struts configured to be inserted through the opening in the atrial septum created by the penetrator in a collapsed configuration and to be positioned against the atrial septum in a radially expanded configuration;
- a sheath extending over the tissue retaining device and sized to allow the radially expanded tissue retaining device to be advanced through a longitudinal lumen of the sheath;
- and
- at least one mechanism configured to separate the tissue surrounding the opening in the atrial septum created by the penetrator from the atrial septum wherein said mechanism has a general size larger than the radially expanded tissue retaining device.
A method for normalizing elevated blood pressure in a heart chamber, the method comprising the steps of:
- inserting a tissue retaining device comprising a plurality of struts through an opening in an atrial septum between a right atrium and a left atrium while the tissue retaining device is in a collapsed state;
- radially expanding the tissue retaining device around the opening;
- separating the tissue surrounding the opening in the atrial septum from the atrial septum;
- and
- permitting blood flow from the left atrium to the right atrium through the opening to reduce left atrial pressure without implanting a stent or valve in the opening.
Dependencies are inferred from the claim text.