# US 10,864,310 B2 · Impeller for use in blood pump

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- Number: US 10,864,310 B2
- Document ID: US10864310B2
- Status: Granted
- Kind: B2
- Application number: 16/278,323
- Filed: 2019-02-18
- Published: 2019-06-13
- Granted: 2020-12-15
- Earliest claimed: 2013-03-13
- Assignees: Magenta Medical Ltd.
- Applicants: Magenta Medical Ltd.
- Inventors: Ehud Schwammenthal; Yosi Tuval; Daniel Glozman
- Web page: https://patentgrep.com/patent/US10864310B2

## CPC

- A61F 2/07: Stent-grafts
- A61B 5/02055: {Simultaneously evaluating both cardiovascular condition and temperature}
- 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 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
- A61M 60/33: of kidneys
- A61M 60/411: generated by an electromotor
- A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
- A61M 60/523: using blood flow data, e.g. from blood flow transducers
- A61M 60/808: specially adapted for deformable impellers, e.g. expandable impellers
- A61M 60/81: Pump housings
- A61M 60/825: Contact bearings, e.g. ball-and-cup or pivot bearings
- A61M 60/833: Occluders for preventing backflow
- 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 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
- A61M 60/896: having flexible or resilient parts, e.g. flap valves
- A61M 2207/00: Methods of manufacture, assembly or production
- A61M 2210/1082: Kidney
- A61M 2210/12: Blood circulatory system
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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 an impeller that includes an impeller frame that comprises proximal and distal end portions and at least one helical elongate element that winds from the proximal end portion to the distal end portion. A material is coupled to the at least one helical elongate element, such that the at least one helical elongate element with the material coupled thereto defines a blade of the impeller. A plurality of sutures are tied around the at least one helical elongate element, the sutures being configured to facilitate coupling of the material to the at least one helical elongate element. Other applications are also described.

## Claims

### Claim 1

A method, comprising:
manufacturing an impeller by:
cutting a tube such that the cut tube defines a structure having first and second end portions at proximal and distal ends of the structure, the end portions being connected to one another by at least one elongate element;
tying sutures around the at least one elongate element;
causing the at least one elongate element to radially expand and form at least one helical elongate element, by axially compressing the structure; and
coupling a material to the at least one helical elongate element, such that the at least one helical elongate element with the material coupled thereto defines a blade of the impeller,
the sutures being configured to facilitate coupling of the material to the helical elongate element,
wherein the at least one helical elongate element has a first stiffness, wherein the material comprises a material having a lower stiffness than the first stiffness, and wherein tying sutures around the at least one elongate element comprises using the sutures as mediators, such as to enhance bonding between the at least one helical elongate element and the material.

### Claim 2 (depends on 1)

The method according to claim 1, wherein coupling a material to the at least one helical elongate element comprises coupling the material to the at least one helical elongate element such that the material defines a hollow central lumen therethrough, the hollow central lumen facilitating the insertion of an axial support member through the hollow central lumen.

### Claim 3 (depends on 1)

The method according to claim 1, wherein manufacturing the impeller comprises manufacturing a biocompatible impeller that is configured to be inserted into a blood vessel of a subject.

### Claim 4 (depends on 1)

The method according to claim 1, wherein cutting the tube further comprises forming a notch in an edge of at least one of the end portions, the notch being configured to facilitate coupling of the material to the at least one helical elongate element.

### Claim 5 (depends on 1)

The method according to claim 1, wherein cutting the tube comprises cutting the tube such that the cut tube defines a structure having first and second end portions at proximal and distal ends of the structure, the end portions being connected to one another by three elongate elements, and wherein causing the at least one elongate element to radially expand and form at least one helical elongate element comprises causing the three elongate elements to form three helical elongate elements.

### Claim 6 (depends on 1)

The method according to claim 1, wherein cutting the tube comprises cutting the tube such that the cut tube defines a structure having first and second end portions at proximal and distal ends of the structure, the end portions being connected to one another by two elongate elements, and wherein causing the at least one elongate element to radially expand and form at least one helical elongate element comprises causing the two elongate elements to form two helical elongate elements.

### Claim 7 (depends on 1)

The method according to claim 1, wherein causing the at least one elongate element to form the at least one helical elongate element comprises causing the at least one elongate element to form at least one helical elongate element, the at least one helical elongate element defining less than half a winding of a helix.

### Claim 8 (depends on 1)

The method according to claim 1, wherein cutting the tube comprises cutting the tube such that the cut tube defines a structure having first and second rings at proximal and distal ends of the structure, and such that first and second ends of each of the at least one elongate element are disposed at an angle from one another with respect to circumferences of the rings, the angle being greater than 50 degrees.

### Claim 9 (depends on 1)

The method according to claim 1, wherein cutting the tube comprises cutting the tube such that the cut tube defines a structure having first and second rings at proximal and distal ends of the structure, and such that first and second ends of the at least one elongate element are disposed at an angle from one another with respect to circumferences of the rings, the angle being less than 180 degrees.

### Claim 10 (depends on 1)

The method according to claim 1, wherein coupling the material to the at least one helical elongate element comprises dipping at least a portion of the structure into the material while the material is in a liquid state, and drying the material, while the material is being supported by the at least one helical elongate element.

### Claim 11 (depends on 10)

The method according to claim 10, wherein tying sutures around the at least one elongate element comprises enhancing bonding between the at least one helical elongate element and the material by increasing a surface area with which the material comes into contact.

### Claim 12 (depends on 10)

The method according to claim 10, wherein tying sutures around the at least one elongate element comprises enhancing bonding between the at least one helical elongate element and the material by providing a surface that is more porous that that of the helical elongate element, with which the material comes into contact.

### Claim 13 (depends on 10)

The method according to claim 10, wherein the material includes silicone, and wherein drying the material comprises curing the silicone.