# US 6,296,762 B1 · Apparatus for disinfecting a device for the central preparation and distribution of salt concentrates

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- Number: US 6,296,762 B1
- Document ID: US6296762B1
- Status: Granted
- Kind: B1
- Application number: 09/570,110
- Filed: 2000-05-12
- Granted: 2001-10-02
- Earliest claimed: 1994-09-20
- Assignees: Gambro AB
- Inventors: Lennart Jönsson; Birger Hallberg; Sven Jönsson; Stefan Knutsson; Lennart Olsson
- Web page: https://patentgrep.com/patent/US6296762B1

## CPC

- B01F 21/00: Dissolving (separating by dissolving B01D; dissolving to effect cooling F25D5/00)
- A61L 2/04: Heat (radiation A61L2/08)
- A61M 1/1656: {Apparatus for preparing dialysates}
- A61M 1/1657: {with centralised supply of dialysate or constituent thereof for more than one dialysis unit}
- A61M 1/1666: {by dissolving solids}
- A61M 1/1668: {Details of containers}
- A61M 1/167: {Flexible packaging for solid concentrates}
- A61M 1/1686: {by heat}
- A61M 1/1688: {with recirculation of the sterilising fluid}
- B01F 21/30: {Workflow diagrams or layout of plants, e.g. flow charts; Details of workflow diagrams or layout of plants, e.g. controlling means}
- B01F 23/59: {Mixing systems, i.e. flow charts or diagrams}
- B01F 25/50: Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F 33/81: Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F 33/812: {in two or more alternative mixing receptacles, e.g. mixing in one receptacle and dispensing from another receptacle}
- B01F 35/50: Mixing receptacles
- B01F 35/513: Flexible receptacles, e.g. bags supported by rigid containers
- A61L 2103/05: Living organisms or biological materials
- A61M 1/169: {using chemical substances}
- A61M 2205/84: for treating several patients simultaneously
- B01F 2035/99: {Heating}
- Y10T 137/2499: Mixture condition maintaining or sensing
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- 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)}
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Methods for the central preparation and distribution of a concentrate to a plurality of medical treatment devices are disclosed comprising supplying a stream of substantially only water to a central container which includes a single salt composition at least partially in solid form, producing a substantially saturated solution of the salt composition in the central container, and distributing the salt solution to a distribution conduit which includes a plurality of concentrate connectors whereby the salt solution can be distributed to the plurality of medical treatment devices. Methods for disinfecting this apparatus, the apparatus itself, and containers for use in the apparatus are also disclosed.

## Claims

### Claim 1

Apparatus for disinfecting a device for the central preparation and distribution of a concentrate to a plurality of medical treatment devices comprising a central concentrate container for preparation of a substantially saturated solution of substantially only a single salt composition, distribution means for distributing said salt solution from said central concentrate container to a plurality of concentrate connectors, each of said plurality of concentrate connectors being adapted for attachment to one of said plurality of medical treatment devices whereby said salt solution can be distributed to said plurality of medical treatment devices, and recirculation means for recirculating said salt solution through said central concentrate container and said distribution means, said recirculation means including heating means for heating said salt solution to an elevated temperature to disinfect said recirculation means, a pressure meter for measuring the pressure in said recirculation means, and a concentrate measuring means for measuring the concentration of said salt solution.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein said concentration measuring means comprises a conductivity meter.

### Claim 3 (depends on 1)

The apparatus of claim 1 including bypass means for bypassing said central concentrate container during said disinfecting.

### Claim 4 (depends on 1)

The apparatus of claim 1 wherein said recirculation means comprises a closed system, whereby an elevated pressure can be maintained within said recirculation means.