Final answer:
A thromboelastograph (or thromboelastometry device) is used to measure the various stages of coagulation, from fluid state to clot lysis, and is essential in medical settings for assessing and managing coagulation disorders.
Step-by-step explanation:
The name of the instrument used to measure coagulation from the fluid state until clot lysis occurs is known as a thromboelastograph or a thromboelastometry device. These instruments are capable of recording the kinetics of clot formation, providing a visual representation of the clot's elasticity, which reflects the formation, stabilization, and dissolution of the fibrin-based clot. It measures various parameters that represent the different stages of coagulation - from the initial thrombin burst, through clot strengthening, and eventually clot lysis. This tool is essential in various medical settings to assess coagulation status and function, and to guide therapy in patients with bleeding or clotting complications.