title: [Impact of hip fracture on coagulation function in elderly patients].
abstract: OBJECTIVE
  To investigate the impact of hip fracture on coagulation function in elderly patients.
  
  
  METHODS
  In our study, 127 elderly patients with hip fracture were diagnosed and admitted to Peking University People's Hospital from January 2011 to March 2012. Specimens of their venous blood were obtained before and after the surgery, and measured for fibrinogen (FIB) and D-dimer. Also, we analyzed their age, type of fracture, fracture time, and concomitant diseases.
  
  
  RESULTS
  The FIB level of the patients (127 cases) before surgery was (3.91 ± 1.06) g/L, and 42.52% (54/127) patients' FIB was higher than normal. After the surgery, 28 patients underwent FIB test [(4.21 ± 1.24) g/L], which was higher than the FIB value before surgery, but was not statistically significant. Before surgery, 15 patients underwent D-dimer test [(2 059.5 ± 1 948.0) μg/L]. After the surgery, 26 patients underwent D-dimer test [(2 574.9 ± 1 702.4) μg/L].The two values were significantly higher than normal (P<0.05). The elevated value of FIB had no relationship with age, diabetes, cardiovascular or cerebrovascular diseases. Before surgery, 45.83% (22/48) of the intertrochanteric fracture patients had abnormal FIB, and 40.50% (32/79) of the patients with femoral neck fracture had abnormal FIB, but they were not statistically significant. Grouped according to the fracture time, when fracture time was longer than 96 h, the ratio of abnormal FIB was 26.7%, lower than those of other groups, and the difference was statistically significant (P<0.05).
  
  
  CONCLUSIONS
  The hip fracture in elderly patients has a direct impact on coagulation system, and FIB and D-dimer have significantly changed. According to the variation of FIB after fracture,we speculate that fracture surgery after 96 h may affect the coagulation system at the lowest level.
authors.affiliation: Department of Trauma and Orthopeadics, Peking University People's Hospital; Peking University Traffic Medicine Center, Beijing 100044, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Li-Yue
authors.initials: LY
authors.lastname: Xu
authors.forename: Sen-Yao
authors.initials: SY
authors.lastname: Shao
authors.forename: Lan
authors.initials: L
authors.lastname: Yao
authors.forename: Tian-Bing
authors.initials: TB
authors.lastname: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001777:Blood Coagulation; D005260:Female; D005265:Femoral Neck Fractures / Q000097:blood / Q000601:surgery; D005338:Fibrin Fibrinogen Degradation Products / Q000378:metabolism*; D005340:Fibrinogen / Q000378:metabolism*; D006620:Hip Fractures / Q000097:blood* / Q000601:surgery; D006801:Humans; D008297:Male; D012189:Retrospective Studies
chemical_list: D005338:Fibrin Fibrinogen Degradation Products; C036309:fibrin fragment D; D005340:Fibrinogen