#218 Magnetically Controlled Growing Rods for Early Onset Scoliosis: A Preliminary Report

General Session: Cutting Edge Technology - Imaging Guidance

Presented by: G. La Rosa

Author(s):

G. La Rosa (1)
L. Ruzzini (1)
L. Oggiano (1)

(1) Bambino Gesù Children’s Hospital, IRCCS, Palidoro, Department of Surgery and Transplants Center, Orthopedic Unit, Fiumicino, Italy

Abstract

Introduction: Conservative management of early onset scoliosis (EOS), which include orthoses and casting techniques, is the initial method of treatment, but when this is inappropriate or fail, surgical intervention will need to be considered. The principal aims of surgical treatment of EOS are to control the progressing deformity and to maximize the growth of the trunk. For this reason a new method for the management of such kind of scoliosis has been recently introduced: it consists in a magnetically controlled growing rod (MAGEC) that allow gradual outpatient distractions through a controlled remote device.

Methods: We implanted magnetically controlled growing rods in five patients affected by early onset scoliosis. We preoperatively evaluated on plain radiographs the degree of scoliosis assessing Cobb angle, the degree of kiphosis and the spinal length assessing T1-T12 and T1-S1 distances.

We have one patient with 12 months of follow-up, two patients with 6 months of follow-up and two patients with 3 months of follow-up. Plain radiographs were obtained after each distraction and rod real lengthening was evaluated and compared to the predicted one. After 6 and 12 months of follow-up Cobb angle, Kyphosis angle and T1-T12 and T1-S1 distance were evaluated.

Results: Magnetically controlled growing rods have been successively implanted in all our patients. The one-year follow-up patient showed a Cobb angle of 27°, a kyphosis angle of 21°, a T1-S1 length of 34 cm and a T1-T12 length of 21 cm. The scoliosis curve remained stable at 27 °from postoperative to one year of follow-up leading the growth of the spine as demonstrated from the higher T1-S1 and T1-T12 values. There were no intraoperative or postoperative complications and the outpatient distractions were painless an well tolerated by all the patients.

Conclusion: Our preliminary study showed that magnetically controlled growing rods can be safely and effectively used in patients affected by early onset scoliosis. We showed that magnetically controlled growing rods after 12 months of follow-up were able to maintain spine correction (27°) and to allow spinal growth as demonstrated by the higher values of T1-S1 and T1-T12 length.