Methods and systems for measuring and using the oxidation-reduction potential of a biological sample

A system for identifying an oxidative capacity of a fluid, comprising:

• a fluid sample;
• a test strip, including:
• a reference cell;
• a sample chamber;
• a counter electrode, wherein a first portion of the counter electrode extends into the sample chamber;
• a working electrode, wherein a first portion of the working electrode extends into the sample chamber;
• a reference electrode, wherein the reference electrode is in electrical contact with the reference cell;
• a readout device, including:
• a first contact;
• a second contact;
• a third contact;
• a test signal power supply, wherein a first terminal of the test signal power supply is electrically connected to the first contact, and wherein a second terminal of the test signal power supply is electrically connected to the second contact;
• an electrometer, wherein a first input of the electrometer is electrically connected to the second contact, and wherein a second input of the electrometer is electrically connected to the third contact;
• memory;
• a processor, wherein with the first contact electrically connected to the counter electrode, the second contact electrically connected to the working electrode, and the third contact electrically connected to the reference electrode, and with the fluid sample in the sample chamber, the processor is operable to execute programming code stored in the memory to:
• operate the test signal power supply to supply a current across the sample chamber between the counter electrode and the working electrode for at least a first period of time;
• during the first period of time, monitor and/or record the voltage sensed by the electrometer;
• identify an inflection point in the voltage sensed by the electrometer;
• record the time at which the inflection point is identified.