# US 11,992,594 B2 · Blood circulation system

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- Number: US 11,992,594 B2
- Document ID: US11992594B2
- Status: Granted
- Kind: B2
- Application number: 17/001,122
- Filed: 2020-08-24
- Published: 2020-12-10
- Granted: 2024-05-28
- Earliest claimed: 2014-08-20
- Assignees: Senko Medical Instrument Mfg. Co., Ltd.
- Applicants: SENKO MEDICAL INSTRUMENT Mfg. Co., Ltd.; Naoki Niimi
- Inventors: Yoshinari Niimi; Katsunori Tanaka; Masahiro Kihara; Munehiro Kishi; Taku Maruya; Masanori Yoshihara; Masahiro Kamiya
- Web page: https://patentgrep.com/patent/US11992594B2

## CPC

- A61M 1/3607: {Regulation parameters}
- A61M 1/3666: {Cardiac or cardiopulmonary bypass, e.g. heart-lung machines}
- A61M 1/38: Removing constituents from donor blood and {storing or} returning remainder to body {, e.g. for transfusion}
- A61M 1/3623: {Means for actively controlling temperature of blood}
- A61M 2205/3334: Measuring or controlling the flow rate
- A61M 2205/3365: Rotational speed
- 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 artificial heart and lung apparatus (100) includes a roller pump (120); a blood removal line (101); a first blood transfer line (104); a blood removal rate sensor (111); a control unit (140) that performs the linked control of the roller pump (120) in correspondence with a blood removal rate; and a blood transfer rate adjustment unit (160) that instructs the roller pump (120) to transfer a blood transfer rate. The blood transfer rate adjustment unit (160) includes an operation amount input unit to which an operation amount from an arbitrary circumferential position can be input, and which outputs a pulse signal according to the input operation amount, and a counter that adds and subtracts pulse signals output from the operation amount input unit, and outputs a resultant as blood transfer rate adjustment data, and the counter performs a counting operation with respect to the circumferential position of the operation amount input unit when blood transfer control transitions to the normal control.

## Claims

### Claim 1

A blood circulation system that can be connected to a human body, and is configured to transfer removed blood to the human body via a blood transfer pump, the system comprising:
the blood transfer pump;
a blood removal line through which removed blood flows to the blood transfer pump;
a blood transfer line that is configured to transfer blood, which is sent from the blood transfer pump, to the human body;
a blood removal rate sensor that is provided in the blood removal line; and
a controller that includes a blood removal rate signal input interface connected to the blood removal rate sensor and performs linked control of the blood transfer pump in correspondence with a blood removal rate measured by the blood removal rate sensor such that a blood transfer rate of the blood transfer pump is in a specific range with respect to the blood removal rate,
wherein, for a target blood transfer rate of the blood transfer pump in normal control, the blood transfer pump transfers blood independently from the blood removal rate,
wherein the blood transfer rate is provided to the controller, and a linked blood transfer rate storage stores data relating to a linked blood transfer rate when blood transfer control transitions from the linked control to the normal control,
wherein an operation amount input unit is provided, to which an operation amount from an arbitrary position can be input by a manual operation, and which outputs a pulse signal according to the input operation amount, and a counter that adds and subtracts pulse signals output from the operation amount input unit, and outputs a resultant as blood transfer rate adjustment data, and the counter performs a counting operation with respect to the linked blood transfer rate when the blood transfer control transitions from the linked control to the normal control, and
wherein the controller calculates the target blood transfer rate of the blood transfer pump by adding the blood transfer rate adjustment data to the data relating to the linked blood transfer rate stored in the linked blood transfer rate storage.

### Claim 2 (depends on 1)

The blood circulation system according to claim 1,
wherein the operation amount input unit includes an encoder with a knob through which an operation amount from an arbitrary position can be input to the controller, or a switch through which an increase and decrease amount is instructed.