title: Pseudo-hypotension in patients with ankylosing spondylitis during posterior osteotomy for correction of kyphosis.
abstract: OBJECTIVE
  To report the occurrence of pseudo-hypotension during posterior osteotomy for correction of kyphosis in patients with ankylosing spondylitis.
  
  
  METHODS
  Retrospective case series.
  
  
  METHODS
  University-affiliated hospital.
  
  
  METHODS
  The records of 36 patients with ankylosing spondylitis, who had severe thoracolumbar kyphosis and who underwent one-level transpedicular wedge osteotomy for correction from 2008 to 2010, were reviewed. Details of the patients' condition, anesthetic induction and maintenance, hemodynamic responses during correction and the corresponding treatment, intraoperative course, and immediate postoperative neurological complications were analyzed.
  
  
  RESULTS
  The posterior osteotomy corrected all patients' kyphosis. There were no deaths. In 8 cases, a significant decrease in radial arterial blood pressure (BP) occurred during the correction, but BP recovered to normal levels immediately after the ipsilateral clavicle was drawn downward. Three of the 8 patients suffered numbness and muscle weakness of the upper extremities postoperatively.
  
  
  CONCLUSIONS
  This decrease in BP may be associated with stenosis of the thoracic outlet with compression of neurovascular bundle due to correction, similar to the thoracic outlet syndrome.
authors: Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, Jiangsu, China, 210008.
authors: Zhong
authors: Z
authors: Jiang
authors: Yue
authors: Y
authors: Liu
authors: Wei
authors: W
authors: Zhang
authors: Zhengliang
authors: Z
authors: Ma
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000502:physiology; D005260:Female; D006801:Humans; D006987:Hypesthesia / Q000209:etiology; D007022:Hypotension / Q000209:etiology*; D007738:Kyphosis / Q000209:etiology / Q000601:surgery*; D008297:Male; D018908:Muscle Weakness / Q000209:etiology; D010027:Osteotomy / Q000009:adverse effects*; D012075:Remission, Spontaneous; D012189:Retrospective Studies; D013167:Spondylitis, Ankylosing / Q000150:complications / Q000601:surgery*; D013901:Thoracic Outlet Syndrome / Q000209:etiology; D055815:Young Adult