title: [Study on the needling depth of point Yaotu with CT scanning].
abstract: OBJECTIVE
  To probe the safe depth and angle of needling the point Yaotu for treatment of prolapse of intervertebral disc.
  
  
  METHODS
  CT technique was used for scanning investigation of the depth and angle of needling the point Yaotu.
  
  
  RESULTS
  When the acupuncture needle was inserted vertically to the external space of intervertebral foramen of human body with arrival of qi, the tip of needle could reach to 73 mm deep, which is the best needling depth and angle.
  
  
  CONCLUSIONS
  The needle vertically inserting to the external space of intervertebral foramen at the point Yaotu is proper in treatment of prolapse of intervertebral disc.
authors.affiliation: Shuguang Hospital Affiliated to Shanghai University of TCM, Shanghai 200021, China. huangshirong3268@sina.com
authors.forename: Shi-rong
authors.initials: SR
authors.lastname: Huang
authors.forename: Qi-xiong
authors.initials: QX
authors.lastname: Lin
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
authors.forename: Jian-chu
authors.initials: JC
authors.lastname: Chen
mesh_terms: D015667:Acupuncture Analgesia; D015669:Acupuncture Points; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000628:therapy*; D008159:Lumbar Vertebrae; D008516:Medicine, Chinese Traditional; D014057:Tomography, X-Ray Computed