Patent ID: 9566377
Date: 2017-02-14
CPC Classifications: A61B,A61M,G01N,G01R

Claim:
1. A method comprising: reading an indicia of a medical fluid cartridge to determine a volume of a first fluid passageway of the medical fluid cartridge indicated by the indicia; removeably positioning the medical fluid cartridge in a first magnetic field, such that the first fluid passageway is positioned within a radio frequency device in the magnetic field, and a second fluid passageway of the medical fluid cartridge is positioned within the magnetic field and outside the radio frequency device; flowing dialysis fluid in the second fluid passageway, the first magnetic field aligning atoms of a substance of the dialysis fluid in the second fluid passageway; flowing the dialysis fluid from the second fluid passageway into the first fluid passageway; transmitting radio frequency energy to the dialysis fluid in the first fluid passageway using the radio frequency device, the radio frequency energy changing the alignment of the atoms of the substance of the dialysis fluid, the atoms of the substance generating a second magnetic field in the first fluid passageway; receiving radio frequency energy generated by the atoms of the substance in the dialysis fluid in the first fluid passageway of the medical fluid cartridge, the radio frequency device receiving the radio frequency energy; and determining a concentration of the substance in the dialysis fluid in the first fluid passageway based on the determined volume of the first fluid passageway of the medical dialysis fluid cartridge indicated by the indicia and the received radio frequency energy generated by the atoms of the substance of the dialysis fluid in the first fluid passageway of the medical fluid cartridge.