# US 2025/0082920 A1 · Impeller and frame for a blood pump

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

- Number: US 2025/0082920 A1
- Document ID: US20250082920A1
- Status: Published application
- Kind: A1
- Application number: 18/955,121
- Filed: 2024-11-21
- Published: 2025-03-13
- Earliest claimed: 2019-01-24
- Assignees: Magenta Medical Ltd.
- Applicants: Magenta Medical Ltd
- Inventors: Yosi Tuval; Zev Sohn; Ehud Schwammenthal; Gad Lubinsky; Victor Troshin; Shaul Jacob Leisner Mustacchi; Yinnon Elisha; Yuri Sudin; Hagit Zemer Harel; Avi Rozenfeld
- Web page: https://patentgrep.com/patent/US20250082920A1

## CPC

- A61M 60/81: Pump housings
- A61M 60/126: implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
- A61M 60/135: inside a blood vessel, e.g. using grafting
- A61M 60/139: inside the aorta, e.g. intra-aortic balloon pumps
- A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
- A61M 60/165: implantable in, on, or around the heart
- A61M 60/174: discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system
- A61M 60/216: including a rotating member acting on the blood, e.g. impeller
- A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
- A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
- A61M 60/531: using blood pressure data, e.g. from blood pressure sensors
- A61M 60/808: specially adapted for deformable impellers, e.g. expandable impellers
- A61M 60/812: Vanes or blades, e.g. static flow guides
- A61M 60/816: Sensors arranged on or in the housing, e.g. ultrasonic flow sensors
- A61M 60/818: Bearings
- A61M 60/825: Contact bearings, e.g. ball-and-cup or pivot bearings
- A61M 60/829: having a purge fluid supply
- A61M 60/857: Implantable blood tubes
- A61M 60/865: Devices for guiding or inserting pumps or pumping devices into the patient's body
- A61M 60/894: Passive valves, i.e. valves actuated by the blood
- A61M 60/122: Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M 60/205: Non-positive displacement blood pumps
- A61M 60/419: the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
- A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
- A61M 60/804: Impellers
- A61M 2205/0216: Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
- 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

Apparatus and methods are described including a blood pump that includes an impeller configured to pump blood through a subject's body, and a frame disposed around the impeller. In a radially-non-constrained configuration of the frame, the frame defines a proximal conical portion and a cylindrical portion disposed distally to the proximal conical portion. The blood pump is configured such that such that, during at least some of the operation of the blood pump, at least a portion of the impeller is disposed within the proximal conical portion of the frame. Other applications are also described.

## Claims

### Claim 1

Apparatus comprising:
a blood pump comprising:
an impeller configured to pump blood through a subject's body;
a frame disposed around the impeller, wherein, in a radially-non-constrained configuration of the frame, the frame defines a proximal conical portion and a cylindrical portion disposed distally to the proximal conical portion,
wherein the blood pump is configured such that, during at least some of the operation of the blood pump, a first portion of the impeller is disposed within the proximal conical portion of the frame.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein the frame further defines a distal conical portion disposed distally to the cylindrical portion.

### Claim 3 (depends on 1)

The apparatus according to claim 1, wherein the impeller comprises at least a portion along which a diameter of the impeller increases toward a location along the impeller at which a span of the impeller is at its maximum, and wherein the blood pump is configured such that at least some of the portion of the impeller along which the diameter of the impeller increases is disposed within the conical portion of the frame during at least some of the operation of the blood pump.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein the blood pump is configured such that, during at least some of the operation of the blood pump, a second portion of the impeller is disposed within the cylindrical portion of the frame.

### Claim 5 (depends on 4)

The apparatus according to claim 4, wherein throughout the operation of the blood pump, at a location at which a span of the impeller is at its maximum, the impeller is configured to be disposed within the cylindrical portion of the frame.

### Claim 6 (depends on 4)

The apparatus according to claim 4, wherein the impeller comprises at least a portion along which a diameter of the impeller increases toward the location along the impeller at which the span of the impeller is at its maximum, and wherein the blood pump is configured such that at least some of the portion of the impeller along which the diameter of the impeller increases is disposed within the conical portion of the frame during at least some of the operation of the blood pump.

### Claim 7 (depends on 1)

The apparatus according to claim 1, wherein the frame comprises struts that are shaped to define cells, and wherein a density of the struts increases from the proximal conical portion to the cylindrical portion.

### Claim 8 (depends on 7)

The apparatus according to claim 7, wherein the frame further defines a distal conical portion disposed distally to the cylindrical portion, and wherein the density of the struts increases from the distal conical portion to the cylindrical portion.

### Claim 9 (depends on 7)

The apparatus according to claim 7, wherein, within the cylindrical portion of the frame, a strut density of the frame is constant.

### Claim 10 (depends on 7)

The apparatus according to claim 7, wherein a width of each of the cells within the cylindrical portion as measured around a circumference of the cylindrical portion is less than 2 mm.

### Claim 11 (depends on 10)

The apparatus according to claim 10, wherein the width of each of the cells within the cylindrical portion as measured around the circumference of the cylindrical portion is between 1.4 mm and 1.6 mm.

### Claim 12 (depends on 10)

The apparatus according to claim 10, wherein the width of each of the cells within the cylindrical portion as measured around the circumference of the cylindrical portion is between 1.6 mm and 1.8 mm.