Hepln-13 is primarily used in medical settings as an anticoagulant to prevent and treat blood clots. It is often administered in hospitals to patients undergoing surgeries, especially those involving the heart or blood vessels, to reduce the risk of thrombosis. Additionally, it is used in dialysis procedures to prevent clotting in the extracorporeal circuit. Hepln-13 is also employed in the management of conditions like deep vein thrombosis, pulmonary embolism, and certain cardiovascular disorders. Its ability to inhibit blood clotting makes it a critical component in maintaining blood flow in critical care scenarios.