Method of monitoring an automated point-of-care fluid testing system

A method of generating voltage output limits for a fluid draw of a fluid testing system having an optical sensor, a patient connection adapted to connect the system to a patient to collect a fluid sample, a pump, and a processor in communication with a memory, the method comprising:

• drawing a known quantity fluid sample using a pump of the testing system to draw the fluid sample to the testing system;
• generating a plurality of voltage outputs of an optical sensor indicative of a fluid present at the optical sensor periodically during the drawing of the fluid sample;
• calculating an upper voltage limit utilizing a forward exponential moving average of the plurality of voltage outputs and a positive offset value;
• and
• calculating a lower voltage limit utilizing a reverse exponential moving average of the plurality of voltage outputs and a negative offset value.

A method of generating voltage output limits for a fluid flush of a fluid testing system having an optical sensor, a patient connection adapted to connect the system to a patient to collect a fluid sample, a pump, and a processor in communication with a memory, the method comprising:

• flushing a known quantity of fluid from the fluid testing system using a pump of the testing system to flush the fluid;
• generating a plurality of voltage outputs of an optical sensor indicative of a fluid present at the optical sensor periodically during the flushing of the fluid;
• calculating an upper voltage limit utilizing a reverse exponential moving average of the plurality of voltage outputs and a positive offset value;
• and
• calculating a lower voltage limit utilizing a forward exponential moving average of the plurality of voltage outputs and a negative offset value.