# US 12,005,171 B2 · Filtering systems and filtering manifolds for use with filtering systems

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- Number: US 12,005,171 B2
- Document ID: US12005171B2
- Status: Granted
- Kind: B2
- Application number: 17/332,180
- Filed: 2021-05-27
- Published: 2021-12-02
- Granted: 2024-06-11
- Earliest claimed: 2020-05-28
- Assignees: Minnetronix Neuro, Inc.
- Applicants: Minnetronix Neuro, Inc.
- Inventors: Justin Charles Jones; Matthew John Hill; Elizabeth Christine Johnson; Brett Jacob Andreas; Lucas John Sheehan; Nathan Mueggenberg; Chase Knight-Scott; David John Deroode
- Web page: https://patentgrep.com/patent/US12005171B2

## CPC

- A61M 1/3496: {Plasmapheresis; Leucopheresis; Lymphopheresis (A61M1/3472 takes precedence)}
- A61M 1/88: {Draining devices having means for processing the drained fluid, e.g. an absorber (for liposuction A61M1/892)}
- A61M 1/34: Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
- A61M 1/36: Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation {; Extra-corporeal blood circuits}
- A61M 1/362263: {Details of incorporated filters}
- A61M 27/006: {Cerebrospinal drainage; Accessories therefor, e.g. valves}
- A61M 2027/004: {with at least a part of the circuit outside the body}
- A61M 2202/0464: Cerebrospinal fluid
- A61M 2205/123: with incorporated reservoirs
- A61M 2205/125: with incorporated filters
- A61M 2205/3331: Pressure; Flow
- A61M 2205/75: with filters
- A61M 2206/10: Flow characteristics
- 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

Filtering device for filtering cerebrospinal fluid are disclosed. An example filtering device may include a filter housing having an inlet for receiving cerebrospinal fluid from a patient and an outlet for returning filtered cerebrospinal fluid to the patient. The filter housing may include a plurality of layers coupled together and defining a fluid pathway therein between the inlet and the outlet. A filtering section may be defined within the filter housing along the fluid pathway. The filtering section may include a widened region of the fluid pathway that is configured to slow the passage of fluid therethrough.

## Claims

### Claim 1

A filtering device for filtering cerebrospinal fluid, the filtering device comprising:
a controller assembly having a socket formed therein;
a filter cassette configured to be removably secured to the socket, the filter cassette defining a filter housing formed from a plurality of discrete layers coupled together and defining a fluid pathway therein;
a membrane disposed between two adjacent layers of the filter housing;
wherein the filter housing has an asymmetric shape that allows the filter cassette to be removably secured to the socket in a singular orientation;
one or more laterally projecting latching projections extending from the filter housing, the latching projections being configured to engage the controller assembly so as to releasably secure the filter housing to the socket; and
a filtering section defined by a widened region of the fluid pathway that is configured to slow the passage of fluid therethrough in order to allow gravity filtration of fluid passing therethrough.

### Claim 2 (depends on 1)

The filtering device of claim 1, further comprising a filter disk member disposed between two adjacent layers of the filter housing.

### Claim 3 (depends on 2)

The filtering device of claim 2, wherein the filter disk member includes a dead-end filter disk.

### Claim 4 (depends on 1)

The filtering device of claim 1, further comprising one or more sensors coupled to the filter housing.

### Claim 5 (depends on 1)

The filtering device of claim 1, further comprising a sampling port.