Fluid loss estimation based on weight of medical items

A system for quantifying fluid from a patient, the system comprising:

• a scale configured to measure a wet weight of at least one item containing a first volume of a first fluid;
• a display configured to display a graphical representation of a container containing a volume of a second fluid and a second volume of the first fluid, wherein the graphical representation comprises a first display element for receiving a first user input indicating the volume of the second fluid in the container and a second display element for receiving a second user input indicating a total fluid volume in the container;
• and
• a processor coupled to the scale and the display, wherein the processor is configured to perform operations comprising:
• identifying a scale signal pattern associated with a weighing event distinct from a non-weighing event, the identifying being performed using a machine learning algorithm trained on a training data set of scale signal patterns corresponding to weighing events and to non-weighing events;
• in response to the identifying of the scale signal pattern associated with the weighing event, estimating the first volume of the first fluid in the item based on a difference between a dry weight of the item and the wet weight of the item;
• estimating the second volume of the first fluid in the container based on at least one of the first and second user inputs;
• and
• estimating a quantity of the first fluid based at least in part on the estimated first and second volumes of the first fluid.