Medical fluid cartridge with related systems

• US 10,451,572 B2
• Filed: 07/29/2016
• Issued: 10/22/2019
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Inventors: Jones, Ross Peter
• Primary Examiner(s): Brewster, Hayden
• Application Number:
  US15/223,388
• Publication Number:
  US 20160334348A1
• Time in Patent Office: 1,180 Days
• Field of Search: 7386111, 210 85, 210 962, 210222, 210646, 210647, 324 7619, 324113, 324313, 324318-322, 32475431, 3408546
• CPC Class Codes: A61M 1/152 Details related to the interface between cassette and machine
• CPC Class Codes: A61M 1/154 with sensing means or components thereof
• CPC Class Codes: A61M 1/1562 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/1605 Physical characteristics of the dialysate fluid
• CPC Class Codes: 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
• CPC Class Codes: A61M 1/1654 Dialysates therefor
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1668 Details of containers
• CPC Class Codes: A61M 1/3609 Physical characteristics of the blood, e.g. haematocrit, urea
• CPC Class Codes: A61M 1/36222 Details related to the interface between cassette and machine
• CPC Class Codes: A61M 1/36224 with sensing means or components thereof
• CPC Class Codes: A61M 1/36226 Constructional details of cassettes, e.g. specific details on material or shape
• CPC Class Codes: A61M 1/3681 by irradiation
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/60 with identification means
• CPC Class Codes: A61M 2205/75 with filters
• CPC Class Codes: A61M 2230/20 Blood composition characteristics
• CPC Class Codes: G01N 24/087 Structure determination of a chemical compound, e.g. of a biomolecule such as a protein
• CPC Class Codes: G01N 33/4925 measuring blood gas content, e.g. O2, CO2 , HCO3
• CPC Class Codes: G01R 33/307 : specially adapted for moving the sample relative to the MR system, e.g. spinning mechanisms, flow cells or means for positioning the sample inside a spectrometer
• CPC Class Codes: G01R 33/34092 : RF coils specially adapted for NMR spectrometers
• CPC Class Codes: G01R 33/3635 : Multi-frequency operation
• CPC Class Codes: G01R 33/3806 : Open magnet assemblies for improved access to the sample, e.g. C-type or U-type magnets
• CPC Class Codes: G01R 33/383 : using permanent magnets
• CPC Class Codes: G01R 33/465 : applied to biological material, e.g. in vitro testing

Abstract

This disclosure relates to medical fluid sensors and related systems and methods. In some aspects, a medical fluid cartridge includes a body including a first portion defining a first fluid passageway and a second portion defining a second fluid passageway in fluid communication with the first fluid passageway. The first portion of the body can be disposed in a radio frequency device while the second portion of the body remains outside the radio frequency device.

Claims

1. A medical fluid cartridge comprising:

a body comprising;

a first portion defining a meandering fluid passageway extending between a fluid inlet port and a fluid outlet port, and

a second portion defining a fluid passageway extending between the fluid inlet port and the fluid outlet port, and

a partition arranged so that a cross sectional area of the meandering passageway adjacent the fluid inlet port is less than a cross sectional area of the fluid passageway defined by the second portion adjacent the fluid inlet port;

wherein the partition is configured such that a first flow path of the meandering passageway adjacent the fluid inlet port is substantially parallel to a second flow path of the fluid passageway adjacent the fluid inlet port,

wherein the partition is positioned adjacent to the fluid inlet port such that when fluid flows into the medical fluid cartridge via the fluid inlet port, the fluid is divided between the meandering fluid passageway and the fluid passageway defined by the second portion; and

wherein the meandering fluid passageway and the fluid passageway defined by the second portion are configured so that when fluid flows into the medical fluid cartridge via the fluid inlet port, a flow rate of fluid flowing through the meandering fluid passageway is less than a flow rate of fluid flowing through the fluid passageway defined by the second portion.

2. The medical fluid cartridge of claim 1, wherein the meandering fluid passageway and the fluid passageway defined by the second portion are configured so that when fluid flows into the medical fluid cartridge via the fluid inlet port, the flow rate of fluid flowing through the meandering fluid passageway is 10 percent to 30 percent of the flow rate of fluid flowing through the fluid passageway defined by the second portion.

3. The medical fluid cartridge of claim 1, wherein a cross-sectional flow area of the fluid passageway defined by the second portion is 5 to 15 times greater than a cross-sectional flow area of the meandering fluid passageway.

4. The medical fluid cartridge of claim 1, wherein the body is configured such that 10 percent to 30 percent by volume of the medical fluid flowing through the fluid inlet port passes through the meandering fluid passageway.

5. The medical fluid cartridge of claim 1, wherein the fluid passageway defined by the second portion is a substantially straight fluid passageway.

6. The medical fluid cartridge of claim 1, wherein the meandering fluid passageway has a first region and a second region, a cross-sectional flow area of the first region being greater than a cross-sectional flow area of the second region.

7. The medical fluid cartridge of claim 6, wherein the second region of the meandering fluid passageway is configured to carry fluid to the first region of the meandering fluid passageway.

8. The medical fluid cartridge of claim 1, wherein the medical fluid cartridge comprises indicia that indicates a volume of a first region of the meandering fluid passageway.

9. The medical fluid cartridge of claim 1, wherein the medical fluid cartridge is a dialysis fluid cartridge.

10. A medical fluid system comprising:

a medical fluid pumping machine;

a magnet assembly defining a cavity, the magnet assembly being configured to generate a magnetic field within the cavity; and

a medical fluid cartridge comprising;

a body comprising;

a first portion defining a meandering fluid passageway extending between a fluid inlet port and a fluid outlet port, and

a second portion defining a fluid passageway extending between the fluid inlet port and the fluid outlet port, and

a partition arranged so that a cross sectional area of the meandering passageway adjacent the fluid inlet port is less than a cross sectional area of the fluid passageway defined by the second portion adjacent the fluid inlet port;

wherein the partition is positioned adjacent to the fluid inlet port such that when fluid flows into the medical fluid cartridge via the fluid inlet port, the fluid is divided between the meandering fluid passageway and the fluid passageway defined by the second portion;

wherein the meandering fluid passageway and the fluid passageway defined by the second portion are configured so that when fluid flows into the medical fluid cartridge via the fluid inlet port, a flow rate of fluid flowing through the meandering fluid passageway is less than a flow rate of fluid flowing through the fluid passageway defined by the second portion.

11. The medical fluid system of claim 10, further comprising a radio frequency device disposed in the cavity of the magnet assembly, a first section of the first portion of the body of the medical fluid cartridge being configured to be disposed in the radio frequency device.

12. The medical fluid system of claim 11, wherein a second section of the first portion of the body of the medical fluid cartridge is configured to be disposed within the cavity defined by the magnet assembly and to remain outside the radio frequency device when the first portion of the body of the medical fluid cartridge is disposed in the radio frequency device.

13. The medical fluid system of claim 10, wherein the magnet assembly is part of the medical fluid pumping machine.

14. The medical fluid system of claim 13, wherein the magnet assembly is part of a module that is releasably attached to a housing of the medical fluid pumping machine.

15. The medical fluid system of claim 10, further comprising a medical fluid line connected to the cartridge to carry medical fluid to the cartridge.

16. The medical fluid system of claim 15, wherein the medical fluid pumping machine comprises a pump that is operably connected to the medical fluid line to pump medical fluid to the cartridge.

17. The medical fluid system of claim 10, wherein the medical fluid pumping machine is a dialysis machine.

18. The medical fluid system of claim 10, wherein the medical fluid cartridge is removable from the cavity of the magnet assembly.

19. The medical fluid system of claim 10, wherein a cross-sectional flow area of the fluid passageway defined by the second portion is 5 to 15 times greater than a cross-sectional flow area of the meandering fluid passageway.