Dual Growing Rod Technique Followed for Three to Eleven Years Until Final Fusion : The Effect of Frequency of Lengthening

Retrospective case review of children completing dual growing rod treatment at our institutions. Patients had a minimum of 2 years follow-up. To identify the factors influencing dual growing rod treatment outcome followed to final fusion. Published reports on dual growing rod technique results for e...

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Bibliographic Details
Published in:Spine (Philadelphia, Pa. 1976) Pa. 1976), 2008-04, Vol.33 (9), p.984-990
Main Authors: AKBARNIA, Behrooz A, BREAKWELL, Lee M, MARKS, David S, MCCARTHY, Richard E, THOMPSON, Alistair G, CANALE, Sarah K, KOSTIAL, Patricia N, TAMBE, Anant, ASHER, Marc A
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cerebrospinal fluid. Meninges. Spinal cord
Child
Child, Preschool
Female
Follow-Up Studies
Humans
Lumbar Vertebrae - diagnostic imaging
Lumbar Vertebrae - growth & development
Lumbar Vertebrae - surgery
Male
Medical sciences
Nervous system (semeiology, syndromes)
Neurology
Orthopedic surgery
Radiography
Retrospective Studies
Scoliosis - diagnostic imaging
Scoliosis - physiopathology
Scoliosis - surgery
Severity of Illness Index
Spinal Fusion - adverse effects
Spinal Fusion - instrumentation
Spinal Fusion - methods
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Thoracic Vertebrae - diagnostic imaging
Thoracic Vertebrae - growth & development
Thoracic Vertebrae - surgery
Time Factors
Treatment Outcome
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Summary:Retrospective case review of children completing dual growing rod treatment at our institutions. Patients had a minimum of 2 years follow-up. To identify the factors influencing dual growing rod treatment outcome followed to final fusion. Published reports on dual growing rod technique results for early onset scoliosis demonstrate it to be safe and effective in curve correction and maintenance as well as in allowing spinal growth. Between 1990 and 2003, 13 patients with no previous surgery and noncongenital curves underwent final fusion. All had preoperative curve progression over 10 degrees after unsuccessful nonoperative treatment. There were 10 females and 3 males. Average age was 6.6 +/- 2.9 years at initial surgery. There were 3 idiopathic, 1 nonspine congenital anomaly, and 9 syndromic patients. Analysis included age at initial surgery and final fusion, number and frequency of lengthenings, and complications. Radiographic evaluation included changes in Cobb angle, T1-S1 length, and instrumentation length over the treatment period. Cobb angle improved from 81.0 +/- 23 degrees to 35.8 +/- 15 degrees postinitial and 27.7 +/- 17 degrees after final fusion. Average number of lengthenings was 5.2 +/- 3 at an interval of 9.4 +/- 5 months. T1-S1 length increased from 24.4 +/- 3.4 to 29.3 +/- 3.6 cm postinitial and 35.0 +/- 3.7 cm postfinal fusion. Average growth was 1.46 +/- 0.66 cm/year. Those lengthened at
ISSN:0362-2436
1528-1159
DOI:10.1097/BRS.0b013e31816c8b4e