title: Assay of heparin in plasma using a chromogenic substrate for activated factor X.
mesh_terms: D000991:Antithrombins / Q000097:blood; D001681:Biological Assay / Q000379:methods*; D001777:Blood Coagulation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005170:Factor X; D005338:Fibrin Fibrinogen Degradation Products / Q000097:blood; D006493:Heparin / Q000097:blood* / Q000494:pharmacology; D006801:Humans; D006932:Hyperbilirubinemia / Q000097:blood; D013053:Spectrophotometry
chemical_list: D000991:Antithrombins; D005338:Fibrin Fibrinogen Degradation Products; D005170:Factor X; D006493:Heparin