title: Accuracy of activated partial thromboplastin time drawn through central venous catheters.
mesh_terms: D001780:Blood Coagulation Tests / Q000379:methods*; D001815:Bloodletting; D002408:Catheters, Indwelling; D006493:Heparin / Q000494:pharmacology; D006801:Humans; D010314:Partial Thromboplastin Time; D014680:Veins
chemical_list: D006493:Heparin