title: [Experimental research on whole blood viscosity changes at different time points in rats model with lumbar vertebrae semidislocation].
abstract: OBJECTIVE
  To investigate whole blood viscosity changes at different time points in rats model with lumbar vertebrae semidislocation, study Shi's theroy of qi and blood and "Gucuofeng and Jinchucao" [symbols: see text], also reveal pathological physiology characteristics of spinal disorder.
  
  
  METHODS
  Thirty-six SPF male rats weighted 350 to 450 g were randomly divided into rotatory fixation group (RF group), simple fixation group (SF group) and Sham group (Sham group), 12 rats in each group. Exterior vertebrae implanted through L4-L6 segments of lumbar vertebrae in RF and SF group were connected fixed device. In RF group, L5 spinous process were rotated to right, and caused L5 spinous process was non collinear with L4 and L6; in SF group, external fixed device were simple connected without rotation. At 1, 4, 8 and 12 weeks after fixation, whole blood viscosity changes were tested.
  
  
  RESULTS
  At 4 and 8 weeks after fixation, high (150/s), medium (60/s) and lower (10/s) shear rate in RF and SF group were higher than that of Sham group (P<0.05). At 1 and 12 weeks, there was no sigificant differences among three groups in whole blood viscosity (P>0.05).
  
  
  CONCLUSIONS
  "Gucuofeng and Jinchucao" [symbols: see text] vertebrae could raise whole blood viscosity, increase degree of bloos stasis and induce or aggravate spinal disorder in further.
authors: Bo
authors: B
authors: Chen
authors: Xun
authors: X
authors: Lin
authors: Jian
authors: J
authors: Pang
authors: Ling-jun
authors: LJ
authors: Kong
authors: Hong-sheng
authors: HS
authors: Zhan
authors: Ying-wu
authors: YW
authors: Cheng
authors: Yin-yu
authors: YY
authors: Shi
mesh_terms: D000818:Animals; D001809:Blood Viscosity; D004195:Disease Models, Animal; D004204:Joint Dislocations / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000293:injuries* / Q000601:surgery; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors