title: Short-Term Anticoagulant Therapy and Thrombus Location Are Independent Risk Factors for Delayed Recanalization of Deep Vein Thrombosis.
abstract: BACKGROUND
  Prompt recanalization of the vein containing the thrombus is an important goal during the initial treatment of DVT, and risk factors for delayed recanalization in patients with deep vein thrombosis (DVT) in the lower extremities need to be determined.
  
  
  METHODS
  A total of 174 patients with DVT in lower extremities were recruited from June 2014 to March 2015 at our hospital. Duplex ultrasound scanning was conducted for all patients at 1 and 6 months after baseline evaluation. We divided the patients into recanalization and non-recanalization groups and analyzed risk factors for delayed recanalization.
  
  
  RESULTS
  The univariate analysis revealed that an oral anticoagulant time of less than 3 months and venous thrombus location were risk factors for delayed recanalization (P<0.01). However, age, gender, hypertension, diabetes, pulmonary embolism, incidence factors, the use of catheter-directed thrombolytic (CDT) drugs, and inferior vena cava filter (IVCF) implantation had no influence on the incidence of delayed recanalization in patients with DVT (P>0.05). The multivariate analysis showed that patients with an anticoagulant time of less than 3 months had a lower incidence of recanalization than those with an anticoagulant time of more than 3 months (OR=2.358, P<0.05). The risk of delayed recanalization in patients with proximal DVT was 7 times higher than that in patients with distal DVT.
  
  
  CONCLUSIONS
  Duration of anticoagulant treatment of less than 3 months and venous thrombus location are independent risk factors for delayed recanalization of DVT in the lower extremities.
authors.affiliation: School of Nursing, Chongqing Medical University, Chongqing, China (mainland).
authors.forename: Chuanlin
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland).
authors.forename: Qining
authors.initials: Q
authors.lastname: Fu
authors.affiliation: Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland).
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: School of Nursing, Chongqing Medical University, Chongqing, China (mainland).
authors.forename: Shaoyu
authors.initials: S
authors.lastname: Mu
authors.affiliation: Department of Vascular Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland).
authors.forename: Liping
authors.initials: L
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000925:Anticoagulants / Q000009:adverse effects* / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012307:Risk Factors; D013927:Thrombosis / Q000000981:diagnostic imaging / Q000473:pathology*; D013997:Time Factors; D014463:Ultrasonography; D020246:Venous Thrombosis / Q000000981:diagnostic imaging / Q000209:etiology*; D055815:Young Adult
chemical_list: D000925:Anticoagulants