# US 8,540,618 B2 · Stable aortic blood pump implant

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- Number: US 8,540,618 B2
- Document ID: US8540618B2
- Status: Granted
- Kind: B2
- Application number: 10/770,269
- Filed: 2004-02-02
- Published: 2004-08-05
- Granted: 2013-09-24
- Earliest claimed: 2003-01-31
- Assignees: L. Vad Technology, Inc.
- Applicants: Adrian Kantrowski; Robert Merrill Smith
- Inventors: Adrian Kantrowski; Robert Merrill Smith
- Web page: https://patentgrep.com/patent/US8540618B2

## CPC

- A61M 60/295: Balloon pumps for circulatory assistance
- A61M 60/139: inside the aorta, e.g. intra-aortic balloon pumps
- A61M 60/861: Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body
- A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

An aortic blood pump is described that can be inflated and deflated in response to selective communication with a source of pressurized fluid or air. The pump includes a structure adapted to maintain implant stability in the face of mechanical and fluid forces to which it is exposed in situ. The pump may include a wall adapted to maintain implant stability by connection of the wall to a stiffening element, such as a stent, a brace, a stiffener or any combination of these. Additionally, the pump optionally includes a wall adapted to maintain implant stability by configuring the interior volume to generally follow the contour of the native human aorta.

## Claims

### Claim 1

An implantable blood pump comprising:
a wall having a top surface, a bottom surface and a thickness, the wall in cross-section decreasing in thickness decreases from the top surface to an area adjacent to a bottom edge, and defining an interior pump volume wherein the interior pump volume generally follows the contour of a native human aorta, said thickness at said bottom surface having a bead diameter at least 10% greater in linear dimension than said adjacent wall cross section; and
an inflatable membrane sealed to the wall.

### Claim 2 (depends on 1)

The blood pump in claim 1 wherein the bottom surface is adapted to the curved native aorta.

### Claim 3 (depends on 1)

The blood pump of claim 1 further comprising a gas port housing integral with the wall, the gas port housing having an aperture therein in fluid communication with the interior pump volume.

### Claim 4 (depends on 3)

The pump of claim 3 wherein the aperture defines an angle relative to the wall of between 5 and 30 degrees.

### Claim 5 (depends on 1)

The pump of claim 1 wherein the interior pump volume and the membrane in an inflated state displace from 30 to 80 cubic centimeters.

### Claim 6 (depends on 1)

The pump of claim 1 wherein the top surface is overlayered with a non-tissue adhesive substance.

### Claim 7 (depends on 1)

The pump of claim 1 wherein the thickness of the wall is variable.