Patent foramen ovale closure method

Inventors

Chin-Chen, Chao • Grishaber, Randy David B. • Kammerer, Gene W. • Khan, Isaac John • Park, Jin

Assignees

Cordis US Corp

Abstract

The present invention relates to devices for closing a passageway in a body, for example a patent foramen ovale (PFO) in a heart, and related methods of using such closure devices for closing the passageway. The method includes introducing a mechanical closure device into an atrium of the heart and transeptally deploying the closure device across the interatrial septum to provide proximation of the septum secundum and septum primum.

Core Innovation

The invention relates to facilitating closure of a patent foramen ovale in a heart having an interatrial septum comprised of a septum primum and a septum secundum between a first atrium and a second atrium. The method introduces a mechanical closure device into the first atrium that includes a flexible closure line coupled to a proximal expandable anchor and a distal expandable anchor, each having longitudinally oriented legs attached between proximal and distal end rings held in a longitudinally extended constrained position by a constraining force.

The method penetrates only the septum primum or only the septum secundum from the first atrium to the second atrium at a first location so that at least the distal end portion of the closure device is located in the second atrium. The distal expandable anchor is deployed into the second atrium by distally advancing a catheter to push against a back portion of the distal expandable anchor and releasing the constraining force, allowing the legs to expand radially outward and causing the proximal and distal end rings to move longitudinally inward toward one another.

After partially withdrawing the closure device from the second atrium to the first atrium, the proximal expandable anchor is deployed into the first atrium by distally advancing a plunger within the catheter to push and distally advance the proximal expandable anchor and releasing the constraining force. The method radially expands the proximal and distal expandable anchors into a flat shape by tensioning the closure line.

Claims Coverage

The independent claim set is centered on one independent method claim with five principal inventive features.

The core coverage is directed to a mechanical PFO closure approach that uses a flexible closure line coupled to proximal and distal expandable anchors, deploys the distal and proximal anchors in respective atria by advancing delivery components and releasing a constraining force, and then tensioning the closure line to radially expand the anchors into a flat shape.

Stated Advantages

Documented Applications

No documented applications found