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ISSN: 2165-7939

Journal of Spine
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Research Article

Minimally Invasive Surgery for AIS: An Early Prospective Comparison with Standard Open Posterior Surgery

Firoz Miyanji1*, Amer Samdani2, Arvindera Ghag3, Michelle Marks4 and Peter O. Newton4
1British Columbia Children’s & Women’s Hospital Department of Orthopaedics, Vancouver, Canada
2Shriner’s Hospital for Children, Philadelphia PA, USA
3University of British Columbia Department of Orthopedics, Vancouver BC, Canada
4Rady Children’s Hospital, San Diego, CA, USA
Corresponding Author : Dr. Firoz Miyanji, MD, FRCSC
BC Children’s and Women’s Hospital, Department of Orthopaedics
A234-4480 Oak Street, Vancouver, BC; V6H 3V4, Canada
Tel: 604-875-2651
Fax: 604-875-2275
E-mail: [email protected]
Received April 16, 2013; Accepted May 22, 2013; Published May 24, 2013
Citation: Miyanji F, Samdani A, Ghag A, Marks M, Newton PO (2013) Minimally Invasive Surgery for AIS: An Early Prospective Comparison with Standard Open Posterior Surgery. J Spine S5:001. doi:10.4172/2165-7939.S5-001
Copyright: © 2013 Miyanji F, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Study design: Prospective matched-control comparison study.

Objective: To prospectively compare deformity correction and measures of perioperative morbidity between minimally invasive posterior spinal fusion and conventional open posterior procedures in age- and curve classificationmatched individuals.

Summary of background data: Minimally invasive surgery (MIS) has evolved in an effort to decrease the rate of approach-related morbidity associated with conventional open procedures for spinal disorders. Its widespread use in spinal trauma and degenerative disorders has yielded similar clinical results to open techniques with the added benefit of optimizing peri-operative morbidity. No report has been made comparing the clinical results of MIS to conventional open procedures in the setting of adolescent idiopathic scoliosis (AIS).

Methods: Patients enrolled in a multi-center, longitudinal, prospective AIS study were included in this analysis. Pre-op, peri-op and first erect post-op data was evaluated. 16 MIS patients were matched for age, sex, Lenke classification, and curve size with 16 conventional open posterior procedures. All cases were also matched to a single surgeon to reduce potential surgeon-induced variability. Statistical analysis was done using SPSS v.18.

Results: Age, gender, Lenke classification and curve magnitude were not statistically different between individuals treated with MIS or open surgery (Table 1). Post-op major Cobb was 20 degrees (curve correction 63%) in those treated with MIS and 18 degrees (curve correction 68%) in those treated with open surgery. Both estimated blood loss and length of stay (LOS) were significantly less in the MIS group (277 mL, 4.63 days) compared to the open group (388 mL, 6.19 days); however OR time was significantly longer in the MIS group (444 min) compared to the open group (350 min).

Conclusions: MIS for AIS has similar results to standard open posterior techniques, specifically for curve correction. Although increase in operative time was noted in the MIS group, advantages of MIS over standard open procedures seem to include decreased LOS and blood loss. Further follow-up will be critical to evaluating the longerterm outcomes of the MIS approach to AIS treatment.

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