Indicator dilution techniques are methods used to measure blood flow and volume in various organs. This is done by injecting a known quantity of a tracer, or indicator, into the bloodstream and then measuring its concentration at different points downstream. The dilution of the indicator helps determine how much blood is flowing through a specific area over time. These techniques are commonly used in medical settings to assess conditions like heart disease or kidney function. By analyzing the rate at which the indicator is diluted, healthcare professionals can gain insights into the efficiency of blood circulation and the health of the organ being studied.