title: Single balloon kyphoplasty using far-lateral extrapedicular approach: technical note and preliminary results.
abstract: OBJECTIVE
  The authors have performed a single-balloon kyphoplasty using far-lateral extrapedicular approach in the treatment of osteoporotic vertebral compression fractures. The authors introduce its surgical technique and early clinical results.
  
  
  METHODS
  Clinical outcomes were determined by comparison of preoperative and postoperative visual analog scale score. Radiographic assessment included vertebral height restoration rate (%) and correction of kyphosis.
  
  
  RESULTS
  Thirty-one consecutive patients with 37 vertebrae were treated during a 5-month period and followed up for more than 6 months. Twenty-nine of 31 patients (95%) improved the visual analog scale pain score postoperatively (P<0.001). The average anterior body height was 60.85 +/- 14.27% of estimated height before procedure and 81.86 +/- 12.78% of estimated height after procedure (P<0.007). The average middle body height was 63.14 +/- 14.42% of estimated height before procedure and 80.94 +/- 18.44% of estimated height after procedure (P<0.001). The mean height restoration ratio was 31.72 +/- 20.98%. The kyphotic deformity was corrected from 16.06 +/- 5.24 degree to 8.84 +/- 3.89 degree (P<0.001). There was no surgery and device-related complications.
  
  
  CONCLUSIONS
  Single-balloon kyphoplasty using far-lateral extrapedicular approach is less invasive procedure that produces comparable therapeutic effects with the conventional 2-balloon technique.
authors.affiliation: Department of Neurosurgery, Kang Nam St Mary's Hospital, The Catholic University of Korea, Seocho-Gu, Seoul, Korea.
authors.forename: Kyeong-Sik
authors.initials: KS
authors.lastname: Ryu
authors.forename: Chun-Kun
authors.initials: CK
authors.lastname: Park
authors.forename: Moon-Kyu
authors.initials: MK
authors.lastname: Kim
authors.forename: Dong-Hyun
authors.initials: DH
authors.lastname: Kim
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002404:Catheterization / Q000295:instrumentation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D050815:Fractures, Compression / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D010865:Pilot Projects; D011859:Radiography; D019651:Plastic Surgery Procedures / Q000295:instrumentation* / Q000379:methods*; D013131:Spine / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology; D016896:Treatment Outcome