title: CT value analysis and clinical significance before and after percutaneous lumbar discectomy.
abstract: OBJECTIVE
  To provide theoretical basis for effect and mechanism of percutaneous lumbar discectomy in clinic.
  
  
  METHODS
  A total of 180 patients with lumbar intervertebral disc herniation were evaluated by CT on the fifth day before and after operation. Meanwhile, CT value was measured in the determined level and region.
  
  
  RESULTS
  After operation, CT value of the central and posterior determined point of herniated intervertebral disc was lower significantly than that before operation (P<0.01), but CT value of the anterior determined point was different insignificantly. The excellent and good results of the patients together were 83% postoperatively.
  
  
  CONCLUSIONS
  The curative effect of percutaneous lumbar discectomy is achieved through reduction of lumbar intradiscal pressure.
authors.affiliation: Department of Orthopedics, First Affiliated Hospital, West China Medical University, Chengdu 610041, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Fuxing
authors.initials: F
authors.lastname: Pei
authors.forename: Yueming
authors.initials: Y
authors.lastname: Song
authors.forename: Bin
authors.initials: B
authors.lastname: Shen
authors.forename: Zongke
authors.initials: Z
authors.lastname: Zhou
authors.forename: Wenkai
authors.initials: W
authors.lastname: Song
authors.forename: Cong
authors.initials: C
authors.lastname: Zhang
mesh_terms: D000328:Adult; D017587:Diskectomy, Percutaneous; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000000981:diagnostic imaging* / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome