# US 2019/0167873 A1 · Ventricular assist system and blood pump controller

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- Number: US 2019/0167873 A1
- Document ID: US20190167873A1
- Status: Published application
- Kind: A1
- Application number: 16/211,188
- Filed: 2018-12-05
- Published: 2019-06-06
- Earliest claimed: 2017-12-06
- Assignees: Sun Medical Technology Research Corporation
- Applicants: Sun Medical Technology Research Corporation
- Inventors: Nozomi KOIKE; Shinji KOBAYASHI; Hideki KANEBAKO
- Web page: https://patentgrep.com/patent/US20190167873A1

## CPC

- A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
- A61M 60/178: drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
- A61M 60/232: Centrifugal pumps
- A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
- A61M 60/416: transmitted directly by the motor rotor drive shaft
- A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
- A61M 60/554: of blood pressure
- A61M 60/592: Communication of patient or blood pump data to distant operators for treatment purposes
- A61M 60/81: Pump housings
- A61M 60/824: Hydrodynamic or fluid film bearings
- A61M 60/825: Contact bearings, e.g. ball-and-cup or pivot bearings
- A61M 60/829: having a purge fluid supply
- A61M 60/876: Implantable batteries
- A61M 60/878: Electrical connections within the patient's body
- A61M 60/88: Percutaneous cables
- A61M 2205/0216: Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
- A61M 2205/3606: cooled
- A61M 2205/366: by liquid heat exchangers
- 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 ventricular assist system and a blood pump controller including a blood pump usable in a state where a first slide surface and a second slide surface are brought into contact with each other, and a cool sealing liquid is supplied to a gap formed between the first slide surface and the second slide surface; a first sub controller having a first cool sealing liquid reservoir, a cool sealing liquid pump, a first pipe joint upstream side, and a fourth pipe joint downstream side; and a second sub controller having a blood pump drive circuit, a battery, a first pipe joint downstream side, a second pipe joint upstream side, a third pipe joint downstream side, and a fourth pipe joint upstream side. The first sub controller and the second sub controller are detachably connected by a first pipe joint and a fourth pipe joint.

## Claims

### Claim 1

A ventricular assist system comprising:
a blood pump having: a fixed side slide member having an annular first slide surface; a rotary side slide member having an annular second slide surface; a blood pump chamber positioned on an outer peripheral side of the fixed side slide member and the rotary side slide member, an impeller housed in the blood pump chamber and being integrally rotatable with the rotary side slide member; a motor capable of imparting rotary energy to the impeller; and a cool sealing liquid flow chamber which is positioned on an inner peripheral side of the fixed side slide member and the rotary side slide member and through which a cool sealing liquid supplied from an outside flows, the blood pump being used in a state where the first slide surface and the second slide surface are brought into contact with each other, and the cool sealing liquid is supplied to a gap formed between the first slide surface and the second slide surface from the cool sealing liquid flow chamber;
a blood pump controller for driving the blood pump and for supplying the cool sealing liquid to the blood pump;
an electric cable for transmitting a drive signal from the blood pump controller to the blood pump;
an up tube through which the cool sealing liquid is made to flow from the blood pump controller to the blood pump; and
a down tube through which the cool sealing liquid is made to flow from the blood pump to the blood pump controller, wherein
the blood pump controller includes:
a blood pump drive circuit electrically connected to the electric cable and provided for driving the motor of the blood pump;
a battery electrically connected to the blood pump drive circuit for supplying a power source to the blood pump drive circuit;
a first cool sealing liquid reservoir for storing the cool sealing liquid;
a cool sealing liquid pump for sucking the cool sealing liquid supplied from the first cool sealing liquid reservoir and discharging the sucked cool sealing liquid;
a first pipe joint formed of a first pipe joint upstream side and a first pipe joint downstream side which are detachably connected to each other and being capable of relaying the cool sealing liquid supplied from the cool sealing liquid pump;
a second pipe joint formed of a second pipe joint upstream side and a second pipe joint downstream side which are detachably connected to each other where the second pipe joint downstream side is connected to the up tube so as to enable the second pipe joint to relay the cool sealing liquid supplied from the first pipe joint to the up tube;
a third pipe joint formed of a third pipe joint upstream side and a third pipe joint downstream side which are detachably connected to each other where the third pipe joint upstream side is connected to the down tube so as to enable the third pipe joint to relay the cool sealing liquid supplied from the down tube to an inside of the blood pump controller; and
a fourth pipe joint formed of a fourth pipe joint upstream side and a fourth pipe joint downstream side which are detachably connected to each other and being capable of relaying the cool sealing liquid supplied from the third pipe joint downstream side to the first cool sealing liquid reservoir, and
the blood pump controller includes:
a first sub controller (home station) having the first cool sealing liquid reservoir, the cool sealing liquid pump, the first pipe joint upstream side, and the fourth pipe joint downstream side; and
a second sub controller (a portable side controller) having the blood pump drive circuit, the battery, the first pipe joint downstream side, the second pipe joint upstream side, the third pipe joint downstream side, and the fourth pipe joint upstream side, and
the first sub controller and the second sub controller are separable from each other and are joinable to each other by detachably connecting the first pipe joint and the fourth pipe joint.

### Claim 2 (depends on 1)

The ventricular assist system according to claim 1, wherein the first pipe joint upstream side, the first pipe joint downstream side, the fourth pipe joint upstream side, and the fourth pipe joint downstream side respectively include a relay port shut off means which is disposed in a vicinity of a relay port which appears when a pipe joint of each of said respective sides is separated from a pipe joint of a counterpart side which forms a pair with said each of the sides and shuts off between an outer portion and an inner portion of the relay port.

### Claim 3 (depends on 1)

The ventricular assist system according to claim 1, wherein in the blood pump, a dynamic pressure groove is formed on a member which forms a part of a cool sealing liquid flow path.

### Claim 4 (depends on 3)

The ventricular assist system according to claim 3, wherein the dynamic pressure groove is a groove formed on the first slide surface of the fixed side slide member or the second slide surface of the rotary side slide member.

### Claim 5 (depends on 3)

The ventricular assist system according to claim 3, wherein the dynamic pressure groove is a groove formed on a shaft connected to the motor or a bearing.

### Claim 6 (depends on 1)

A blood pump controller being the blood pump controller used in the ventricular assist system according to claim 1, the blood pump controller comprising:
the blood pump drive circuit electrically connected to the electric cable and provided for driving the motor of the blood pump;
the battery electrically connected to the blood pump drive circuit for supplying a power source to the blood pump drive circuit;
the first cool sealing liquid reservoir for storing the cool sealing liquid;
the cool sealing liquid pump for sucking the cool sealing liquid supplied from the first cool sealing liquid reservoir and discharging the sucked cool sealing liquid;
the first pipe joint formed of the first pipe joint upstream side and the first pipe joint downstream side which are detachably connected to each other and being capable of relaying the cool sealing liquid supplied from the cool sealing liquid pump;
the second pipe joint formed of the second pipe joint upstream side and the second pipe joint downstream side which are detachably connected to each other where the second pipe joint downstream side is connected to the up tube so as to enable the second pipe joint to relay the cool sealing liquid supplied from the first pipe joint to the up tube;
the third pipe joint formed of the third pipe joint upstream side and the third pipe joint downstream side which are detachably connected to each other where the third pipe joint upstream side is connected to the down tube so as to enable the third pipe joint to relay the cool sealing liquid supplied from the down tube to an inside of the blood pump controller; and
the fourth pipe joint formed of the fourth pipe joint upstream side and the fourth pipe joint downstream side which are detachably connected to each other and being capable of relaying the cool sealing liquid supplied from the third pipe joint downstream side to the first cool sealing liquid reservoir, and
the first sub controller having the first cool sealing liquid reservoir, the cool sealing liquid pump, the first pipe joint upstream side, the fourth pipe joint downstream side and the second sub controller having the blood pump drive circuit, the battery, the first pipe joint downstream side, the second pipe joint upstream side, the third pipe joint downstream side, and the fourth pipe joint upstream side are separable from each other and are joinable with each other by detachably connecting the first pipe joint and the fourth pipe joint.

### Claim 7 (depends on 6)

The blood pump controller according to claim 6, wherein the second sub controller further includes a second cool sealing liquid reservoir disposed between the first pipe joint downstream side and the second pipe joint upstream side, having capacity smaller than capacity of the first cool sealing liquid reservoir, and storing the cool sealing liquid.

### Claim 8 (depends on 7)

The blood pump controller according to claim 7, wherein the second sub controller further includes a pressure applying means for increasing a pressure of the cool sealing liquid to be supplied to the blood pump.

### Claim 9 (depends on 8)

The blood pump controller according to claim 8, wherein the pressure applying means is an elastic member which applies a force to the second cool sealing liquid reservoir.

### Claim 10 (depends on 8)

The blood pump controller according to claim 8, wherein the pressure applying means is an actuator which applies a force to the second cool sealing liquid reservoir.

### Claim 11 (depends on 7)

The blood pump controller according to claim 7, wherein the second cool sealing liquid reservoir has an flattened portion, and has a flat external appearance as a whole.

### Claim 12 (depends on 7)

The blood pump controller according to claim 7, wherein the second cool sealing liquid reservoir is formed using a material which contains polypropylene or polyethylene.

### Claim 13 (depends on 6)

The blood pump controller according to claim 6, further comprising a separation detection means for detecting a separated state and a joined state between the first sub controller and the second sub controller.