title: Heparin prevention of catheter thrombosis.
mesh_terms: D002404:Catheterization / Q000009:adverse effects*; D006493:Heparin / Q000627:therapeutic use*; D006801:Humans; D013927:Thrombosis / Q000209:etiology / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D006493:Heparin