# US 11,110,263 B2 · Magnetic fixation apparatus for percutaneous catheter

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,110,263 B2
- Document ID: US11110263B2
- Status: Granted
- Kind: B2
- Application number: 16/274,546
- Filed: 2019-02-13
- Published: 2019-07-25
- Granted: 2021-09-07
- Earliest claimed: 2016-04-11
- Assignees: ABIOMED, Inc.
- Applicants: Abiomed, Inc.
- Inventors: Vincent Barry
- Web page: https://patentgrep.com/patent/US11110263B2

## CPC

- A61M 25/04: in the body, e.g. expansible {(A61M25/10, A61M16/0488 take precedence)}
- A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
- A61M 60/232: Centrifugal pumps
- A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
- A61M 60/861: Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body
- 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

A catheter apparatus can include a first magnet coupled to a catheter and a second magnet configured to couple to a patient's skin. When the catheter and the first magnet are positioned within a patient's body, the second magnet can exert a magnetic force on the first magnet that stabilizes the catheter relative to the second magnet. The second magnet can be directly attached to the patient's skin or secondary devices such as straps can be used to place the second magnet in a fixed position relative to the patient's body. In some implementations, a plurality of magnets can facilitate holding the catheter in a substantially fixed position within the patient.

## Claims

### Claim 1

A catheter apparatus comprising:
a catheter;
a heart pump coupled to a distal end portion of the catheter;
a first magnet coupled to an exterior surface of the catheter;
a second magnet configured to be coupled to a patient's skin;
a third magnet coupled to a distal tip of the heart pump; and
a fourth magnet configured to be coupled to the patient's skin at a position different from that of the second magnet;
wherein the second magnet exerts a magnetic force on the first magnet, and the fourth magnet exerts a magnetic force on the third magnet such that the heart pump is stabilized relative to the second and fourth magnets when the catheter and the first and third magnets are positioned inside the patient's body,
wherein the first, second, third and fourth magnets are spaced sufficiently far away from each other such that their magnetic fields do not interfere with each other and with operation of the heart pump, and
wherein the distal tip of the heart pump is coupled to a flexible atraumatic extension.

### Claim 2 (depends on 1)

The catheter apparatus of claim 1, wherein the atraumatic extension comprises a pigtail tip or a rounded tip.

### Claim 3 (depends on 1)

The catheter apparatus of claim 1, wherein the third magnet is coupled to the distal tip of the heart pump via the flexible atraumatic extension.