# US 2015/0148731 A1 · Methods and devices for intra-atrial shunts having adjustable sizes

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- Number: US 2015/0148731 A1
- Document ID: US20150148731A1
- Status: Published application
- Kind: A1
- Application number: 14/612,022
- Filed: 2015-02-02
- Published: 2015-05-28
- Earliest claimed: 2009-09-04
- Assignees: Corvia Medical, Inc.
- Inventors: Edward I. MCNAMARA; Michael W. SUTHERLAND; Matthew J. FINCH; Stephen J. FORCUCCI; John MITZEL; David S. CELERMAJER; Hiroatsu SUGIMOTO
- Web page: https://patentgrep.com/patent/US20150148731A1

## CPC

- A61B 17/0057: {Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect (sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009)}
- A61B 2017/00247: {Making holes in the wall of the heart, e.g. laser Myocardial revascularization}
- A61B 2017/00575: {for closure at remote site, e.g. closing atrial septum defects}
- A61B 2017/00584: {Clips}
- A61B 2017/00592: {Elastic or resilient implements}
- A61B 2017/00606: {Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening}
- A61B 2017/00623: {Introducing or retrieving devices therefor}
- A61F 2/91: made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F 2/915: with bands having a meander structure, adjacent bands being connected to each other
- A61F 2002/075: {the stent being loosely attached to the graft material, e.g. by stitching}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## 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 shunt portion which can be manually adjusted in vivo. Methods are provided for adjusting the flow rate of the devices in vivo.

## Claims

### Claim 1

An expandable device adapted for percutaneous delivery into a membrane of a patient's heart, the device comprising:
first and second anchors adapted to contact, respectively, first and second surfaces of the membrane; and
a stent having a longitudinal axis and being connected to the first and second anchors, the stent comprising an outer cylindrical body comprising a superelastic material and an inner cylindrical body comprising a first diameter and disposed within and connected to the outer cylindrical body and comprising a plastically deformable material, the stent being adapted to permit blood to flow across the membrane at a first rate;
wherein the inner cylindrical body is stent-like and radially expandable to a second diameter greater than the first diameter so as to permit blood to flow across the membrane at a second rate that is different from the first rate.

### Claim 2 (depends on 1)

The device of claim 1, wherein the stent further comprises a cylindrical liner disposed within and attached to the inner cylindrical body.

### Claim 3 (depends on 1)

The device of claim 1, wherein the outer cylindrical body has hooks and the hooks connect the outer cylindrical body to the inner cylindrical body.

### Claim 4 (depends on 1)

The device of claim 1, wherein the plastically deformable material is stainless steel.

### Claim 5 (depends on 1)

The device of claim 1, wherein the superelastic material is nitinol.

### Claim 6 (depends on 1)

The device of claim 1 wherein each of the first and second anchors comprises a plurality of segments.

### Claim 7 (depends on 1)

The device of claim 1 wherein the first anchor, the second anchor, and the stent are integrally connected.