title: Plasma heparin estimation based upon a thrombin clotting time technique.
mesh_terms: D001780:Blood Coagulation Tests / Q000379:methods; D002138:Calibration; D006493:Heparin / Q000097:blood* / Q000627:therapeutic use; D006801:Humans; D013917:Thrombin / Q000502:physiology
chemical_list: D006493:Heparin; D013917:Thrombin