Solute concentration measurement device and related methods
AssigneeTandem Diabetes Care, Inc.
InventorDavid Brown
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Abstract
A solute concentration measurement device is disclosed. The device may comprise a filter membrane, an exchange chamber, a sensing chamber, a separator, and a sensor. The device may be configured to be placed in fluid communication with a sample solution containing a solute and a solvent. The filter membrane may provide selective fluid communication between the solution and the exchange chamber. The separator may separate the exchange chamber from the sensing chamber and cause a change in a condition of the sensing chamber corresponding to a change of a condition of the exchange chamber. The sensor may sense the condition pertaining to the sensing chamber and calculate the concentration of the sample solution corresponding to this change.
Claims13
A device comprising, in combination:
- a housing having disposed therein a filter membrane, an exchange chamber, and a sensing chamber having disposed therein a pressure sensor;
- wherein the exchange chamber and sensing chamber are separated by a movable separator that moves in response to changes in the volume of the exchange chamber;
- and
- wherein the device is adapted to measure the concentration of a solute in a sample solution;
- wherein the solute is glucose.
A method comprising, in combination providing:
- an exchange chamber;
- a sensing chamber;
- a filter membrane configured to provide selective fluid communication between the sample solution and the exchange chamber, but is substantially impermeable to a solute contained in the exchange chamber;
- a movable separator configured to separate the exchange chamber from the sensing chamber;
- and
- a sensor configured to sense a condition pertaining to the sensing chamber;
- and
- wherein the device is adapted to be placed into fluid communication with a sample solution.
A method comprising:
- placing a solute concentration measurement device comprising a housing having disposed therein at least an exchange chamber, a sensing chamber having a pressure sensor, a filter membrane substantially impermeable to the solute, and a movable separator into fluid communication with a sample solution;
- measuring the pressure in the sensing chamber after allowing a solute concentration in the exchange chamber to equilibrate with a solute concentration in the sample solution;
- and
- using the measured pressure in the sensing chamber to calculate the concentration of the solute in the sample solution.
Dependencies are inferred from the claim text.