title: The influence of fondaparinux on the diagnosis of postoperative deep vein thrombosis by soluble fibrin and D-dimer.
abstract: BACKGROUND
  There are many reports concerning the fondaparinux prophylaxis of deep vein thrombosis (DVT) after surgery, but little is known about the usefulness of diagnosing DVT by the thrombotic markers such as soluble fibrin (SF) and D-dimer in patients treated with fondaparinux. The main purpose of this study was to evaluate the accuracy of SF and D-dimer tests for DVT screening in patients undergoing total hip arthroplasty (THA) and total knee arthroplasty (TKA) treated with fondaparinux.
  
  
  METHODS
  A total of 519 patients who underwent THA or TKA were evaluated. SF and D-dimer levels were evaluated on postoperative days 1, 4, 7, 14 and 21. DVT was confirmed by ultrasonography 4 days after surgery.
  
  
  RESULTS
  The incidence of DVT in patients treated with fondaparinux was significantly lower than in patients without fondaparinux. The SF test on postoperative day 1, and the D-dimer test on postoperative days 1, 4, and 7 were useful in untreated patients. However, in the patients treated with fondaparinux, the D-dimer test on postoperative day 7 only was useful for DVT screening.
  
  
  CONCLUSIONS
  The accuracy of SF and D-dimer test for the diagnosis of DVT was decreased by administration of fondaparinux. A new strategy for diagnosing DVT might be required for patients receiving fondaparinux.
authors.affiliation: Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, Edobashi, Tsu City, Mie, 514-8507, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Niimi
authors.forename: M
authors.initials: M
authors.lastname: Hasegawa
authors.forename: D Q
authors.initials: DQ
authors.lastname: Shi
authors.forename: A
authors.initials: A
authors.lastname: Sudo
mesh_terms: D000368:Aged; D000925:Anticoagulants / Q000627:therapeutic use*; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005337:Fibrin / Q000378:metabolism*; D005338:Fibrin Fibrinogen Degradation Products / Q000378:metabolism*; D000077425:Fondaparinux; D006801:Humans; D008297:Male; D008875:Middle Aged; D011134:Polysaccharides / Q000627:therapeutic use*; D011183:Postoperative Complications / Q000175:diagnosis / Q000000981:diagnostic imaging; D011446:Prospective Studies; D014463:Ultrasonography; D020246:Venous Thrombosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000517:prevention & control*
chemical_list: D000925:Anticoagulants; D005338:Fibrin Fibrinogen Degradation Products; D011134:Polysaccharides; C036309:fibrin fragment D; D005337:Fibrin; D000077425:Fondaparinux