# US 2017/0281850 A1 · Artificial dialysis device

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

- Number: US 2017/0281850 A1
- Document ID: US20170281850A1
- Status: Published application
- Kind: A1
- Application number: 15/511,517
- Filed: 2015-08-19
- Published: 2017-10-05
- Earliest claimed: 2014-09-19
- Assignees: Shibuya Corporation
- Applicants: Shibuya Kogyo Co., Ltd.
- Inventors: Kosho MATSUZAKI; Shingo SAITO; Yuki NAKAMURA
- Web page: https://patentgrep.com/patent/US20170281850A1

## CPC

- A61M 1/3652: {using gas, e.g. air}
- A61M 1/14: Dialysis systems; Artificial kidneys; Blood oxygenators (semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00){; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis}
- A61M 1/1621: {Constructional aspects thereof (semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi permeable membranes characterised by their material B01D71/00)}
- A61M 1/168: {Sterilisation or cleaning before or after use}
- A61M 1/1694: {with recirculating dialysing liquid}
- A61M 1/3638: {with a vapour trap}
- B01D 63/02: Hollow fibre modules
- B01D 65/02: Membrane cleaning or sterilisation {; Membrane regeneration}
- A61M 2205/3334: Measuring or controlling the flow rate
- B01D 2321/18: Use of gases
- B01D 2321/26: By suction
- 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)}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A filter CF1 for filtering dialysis fluid comprises the following: a housing 52 inside of which a filter material 51 is accommodated and which is vertically long; an introduction port 53 that is disposed in the lower part of the housing and that introduces dialysis fluid from an upstream-side flow path 23a; a filtered fluid lead-out port 54 through which filtered dialysis fluid, which has passed through the filter material, is lead out from the upper part of the housing to a downstream-side flow path 23b; and an unfiltered fluid lead-out port 55 through which unfiltered fluid is lead out from the upper part of the housing to a waste fluid flow path 57. When removing the filter from a dialysis fluid circuit 4, fluid is suctioned from the inside of the housing via the upstream-side flow path by using fluid suction means 64A, and a gas is caused to flow into the housing from at least either one of the waste fluid flow path and the downstream-side flow path by using gas inflow means 65. The fluid may be suctioned from the downstream-side flow path and the gas may be caused to flow in from the upstream-side flow path, or the fluid may be suctioned from the waste fluid flow path and the gas may be caused to flow in from the downstream-side flow path. Residual fluid in the filter can be reduced.

## Claims

### Claim 1

A dialysis device comprising a dialysis fluid circuit for supplying a dialysis fluid to a dialyzer and a filter connected to the dialysis fluid circuit and filtering the dialysis fluid, characterized in that:
the filter includes a cylindrical housing arranged with a longitudinal direction vertically and accommodating a filter material therein, an introduction port provided on a lower part of the housing and introducing the dialysis fluid into an inside, a filtered fluid lead-out port provided on an upper part of the housing for leading out a filtered dialysis fluid having passed through the filter material in the dialysis fluid having been introduced through the introduction port, and an unfiltered fluid lead-out port provided on an upper part of the housing for leading out unfiltered fluid not having passed through the filter material in the dialysis fluid having been introduced through the introduction port;
the dialysis fluid circuit includes an upstream-side flow path connected to the introduction port of the filter and causing the dialysis fluid to flow into the housing, a downstream-side flow path connected to the filtered fluid lead-out port of the filter and causing the filtered dialysis fluid to flow out from the inside of the housing, and a waste fluid flow path connected to the unfiltered fluid lead-out port and causing the unfiltered fluid to be discharged from the inside of the housing; and
fluid suction means capable of suctioning the fluid inside the housing through the upstream-side flow path and gas inflow means for causing a gas to flow into the housing through at least either one of the waste fluid flow path and the downstream-side flow path are provided in the dialysis fluid circuit; and
when the filter is to be removed from the dialysis fluid circuit by separating it from the upstream-side flow path, the downstream-side flow path, and the waste fluid flow path, the gas inflow means is opened, and the fluid in the housing is suctioned by the fluid suction means so as to discharge the fluid in the housing to an outside.

### Claim 2

A dialysis device comprising a dialysis fluid circuit for supplying a dialysis fluid to a dialyzer and a filter connected to the dialysis fluid circuit and filtering the dialysis fluid, characterized in that:
the filter includes a cylindrical housing arranged with a longitudinal direction vertically and accommodating a filter material therein, an introduction port provided on a lower part of the housing and introducing the dialysis fluid into an inside, a filtered fluid lead-out port provided on an upper part of the housing for leading out a filtered dialysis fluid having passed through the filter material in the dialysis fluid having been introduced through the introduction port, and an unfiltered fluid lead-out port provided on an upper part of the housing for leading out unfiltered fluid not having passed through the filter material in the dialysis fluid having been introduced through the introduction port;
the dialysis fluid circuit includes an upstream-side flow path connected to the introduction port of the filter and causing the dialysis fluid to flow into the housing, a downstream-side flow path connected to the filtered fluid lead-out port of the filter and causing the filtered dialysis fluid to flow out from the inside of the housing, and a waste fluid flow path connected to the unfiltered fluid lead-out port and causing the unfiltered fluid to be discharged from the inside of the housing;
fluid suction means capable of suctioning the fluid inside the housing through the downstream-side flow path and gas inflow means for causing a gas to flow into the housing through at least either one of the upstream-side flow path and the waste fluid flow path are provided in the dialysis fluid circuit; and
when the filter is to be removed from the dialysis fluid circuit by separating it from the upstream-side flow path, the downstream-side flow path, and the waste fluid flow path, the gas inflow means is opened, and the fluid in the housing is suctioned by the fluid suction means so as to discharge the fluid in the housing to an outside.

### Claim 3

A dialysis device comprising a dialysis fluid circuit for supplying a dialysis fluid to a dialyzer and a filter connected to the dialysis fluid circuit and filtering the dialysis fluid, characterized in that:
the filter includes a cylindrical housing arranged with a longitudinal direction vertically and accommodating a filter material therein, an introduction port provided on a lower part of the housing and introducing the dialysis fluid into an inside, a filtered fluid lead-out port provided on an upper part of the housing for leading out a filtered dialysis fluid having passed through the filter material in the dialysis fluid having been introduced through the introduction port, and an unfiltered fluid lead-out port provided on an upper part of the housing for leading out unfiltered fluid not having passed through the filter material in the dialysis fluid having been introduced through the introduction port;
the dialysis fluid circuit includes an upstream-side flow path connected to the introduction port of the filter and causing the dialysis fluid to flow into the housing, a downstream-side flow path connected to the filtered fluid lead-out port of the filter and causing the filtered dialysis fluid to flow out from the inside of the housing, and a waste fluid flow path connected to the unfiltered fluid lead-out port and causing the unfiltered fluid to be discharged from the inside of the housing;
fluid suction means capable of suctioning the fluid inside the housing through the waste fluid flow path and gas inflow means for causing a gas to flow into the housing through the downstream-side fluid flow path are provided in the dialysis fluid circuit; and
when the filter is to be removed from the dialysis fluid circuit by separating it from the upstream-side flow path, the downstream-side flow path, and the waste fluid flow path, the gas inflow means is opened, and the fluid in the housing is suctioned by the fluid suction means so as to discharge the fluid in the housing to an outside.