Document Detail


Next Generation of Growth-Sparing Technique: Preliminary Clinical Results of a Magnetically Controlled Growing Rod (MCGR) in 14 Patients With Early Onset Scoliosis.
MedLine Citation:
PMID:  23060057     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT: Study Design: Prospective non-randomized study.Objective: To report the preliminary results of Magnetically Controlled Growing Rod (MCGR) technique in children with progressive early onset scoliosis (EOS).Summary of Background Data: Growing rod (GR) technique is a viable alternative for treatment of EOS. High complication rate is attributed to frequent surgical lengthening. The safety and efficacy of MCGR was recently reported in a porcine model.Methods: Multicenter study of clinical and radiographic data of patients underwent MCGR surgery and at least 3 distractions. Distractions were performed in clinic without anesthesia/analgesics. T1-T12 and T1-S1 heights and the distraction distance inside the actuator were measured after lengthening.Results: 14 Patients (7 F, 7 M) with a mean age of 8y+10m (3y+6m to 12y+7m) had 14 index surgeries, single rod (SR) in 5 and dual rod (DR) in 9, with overall 68 distractions. Diagnoses were idiopathic (N=5), neuromuscular (N=4), congenital (N=2), syndromic (N=2) and NF (N=1). Mean follow-up (FU) was 10 months (5.8-18.2). Cobb angle changed from 60° to 34° after initial surgery and 31° at latest FU. During distraction period, T1-T12 height increased by 7.6 mm for SR (1.09 mm/month) and 12.12 mm for DR (1.97 mm/month). T1-S1 height gain was 9.1 mm for SR (1.27 mm/month) and 20.3 mm for DR (3.09 mm/month). Complications included superficial infection in 1 SR, prominent implant in 1 DR and minimal loss of initial distraction in 3 SR after index. Partial distraction loss observed following 14 of the 68 distractions (1 DR and 13 SR) but regained in subsequent distractions. There was no neurologic deficit or implant failure.Conclusion: Preliminary results indicated MCGR was safe and provided adequate distraction similar to standard GR. DR achieved better initial curve correction and greater spinal height during distraction compared to SR. No major complications were observed during the FU.
Authors:
Behrooz A Akbarnia; Kenneth Cheung; Hilali Noordeen; Hazem Elsebaie; Muharrem Yazici; Zaher Dannawi; Nima Kabirian
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-10
Journal Detail:
Title:  Spine     Volume:  -     ISSN:  1528-1159     ISO Abbreviation:  Spine     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
*Behrooz A. Akbarnia, M.D., San Diego Center for Spinal Disorders, 4130 La Jolla Village drive, Suite 300, La Jolla, CA.
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