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Conference Paper: Next generation of growth-sparing techniques: preliminary clinical results of a magnetically controlled growing rod in 14 patients

TitleNext generation of growth-sparing techniques: preliminary clinical results of a magnetically controlled growing rod in 14 patients
Authors
Issue Date2011
PublisherScoliosis Research Society.
Citation
The 18th International Meeting on Advanced Spine Techniques (IMAST), Copenhagen, Denmark, 13-16 July 2011. In Final Program of 18th IMAST, 2011, p. 93-94, Paper no. 75 How to Cite?
AbstractSUMMARY: Growth-sparing techniques are commonly used for the treatment of progressive EOS. The standard growing rod (GR) technique requires multiple surgeries for lengthening. The preliminary results of MCGR has shown the comparable outcomes to standard GR without the need for repeated surgery which can be expected to reduce the overall complication rate in GR surgery. INTRODUCTION: Growing rod technique (GR) has been a viable alternative for the treatment of progressive early onset scoliosis (EOS). However, a high complication rate associated with GR has been attributed to frequent surgeries required for lengthening. The safety and efficacy of a non-invasive Magnetically Controlled Growing Rod (MCGR) has been previously reported in a porcine model. We are reporting the preliminary clinical results of the use of this device. METHODS: Multicenter prospective review of early clinical and radiographic data of EOS patients underwent MCGR surgery. Patients who had at least 3 distractions were included. The technique was not significantly different from standard GR surgery. Distractions were performed in clinic without anesthesia or analgesics. The “Target” length (the intended distraction amount in mm which is set on the external magnet) and “Achieved” length (The distraction measured in mm on post distraction radiograph) were also recorded for each distraction. RESULTS: Patients (N=14, F=7,M=7) had mean age of 8y10m (3y6m to 12y7m) and underwent 14 index surgeries, single rod (SR) in 5, dual rod (DR) in 9 and 68 distractions. Diagnosis was idiopathic 5, neuromuscular 4, congenital 2, syndromic 2 and NF one. Mean FU was 9 months (4-15). Average distraction achieved was 4.2 mm per patient. The average time between index surgery and the first distraction was 66 days (28-185) and thereafter was 43 days (23-184). Complications included superficial infection in 1 (SR), prominent implant in 1 (DR) and minimal loss of initial length in 3 (21%) index surgery (all SR). Partial loss of distraction was observed following 14 of the 68 distractions (1 in DR,13 SR). This loss was regained in subsequent distractions. There was no neurologic deficit or implant failure. CONCLUSION: Preliminary results indicate that MCGR appears to be safe and provided the distraction comparable with standard GR procedure without the need for repeated surgeries. No major complications have been observed in the short follow up period …
DescriptionConcurrent Session 4B: Innovatiove Methods - Paper no. 75
Persistent Identifierhttp://hdl.handle.net/10722/165491

 

DC FieldValueLanguage
dc.contributor.authorAkbarnia, BAen_US
dc.contributor.authorCheung, KMCen_US
dc.contributor.authorNoordeen, HHen_US
dc.contributor.authorElsebaie, HBen_US
dc.contributor.authorYazici, Men_US
dc.contributor.authorDannawi, Zen_US
dc.contributor.authorKabirian, Nen_US
dc.date.accessioned2012-09-20T08:19:11Z-
dc.date.available2012-09-20T08:19:11Z-
dc.date.issued2011en_US
dc.identifier.citationThe 18th International Meeting on Advanced Spine Techniques (IMAST), Copenhagen, Denmark, 13-16 July 2011. In Final Program of 18th IMAST, 2011, p. 93-94, Paper no. 75en_US
dc.identifier.urihttp://hdl.handle.net/10722/165491-
dc.descriptionConcurrent Session 4B: Innovatiove Methods - Paper no. 75-
dc.description.abstractSUMMARY: Growth-sparing techniques are commonly used for the treatment of progressive EOS. The standard growing rod (GR) technique requires multiple surgeries for lengthening. The preliminary results of MCGR has shown the comparable outcomes to standard GR without the need for repeated surgery which can be expected to reduce the overall complication rate in GR surgery. INTRODUCTION: Growing rod technique (GR) has been a viable alternative for the treatment of progressive early onset scoliosis (EOS). However, a high complication rate associated with GR has been attributed to frequent surgeries required for lengthening. The safety and efficacy of a non-invasive Magnetically Controlled Growing Rod (MCGR) has been previously reported in a porcine model. We are reporting the preliminary clinical results of the use of this device. METHODS: Multicenter prospective review of early clinical and radiographic data of EOS patients underwent MCGR surgery. Patients who had at least 3 distractions were included. The technique was not significantly different from standard GR surgery. Distractions were performed in clinic without anesthesia or analgesics. The “Target” length (the intended distraction amount in mm which is set on the external magnet) and “Achieved” length (The distraction measured in mm on post distraction radiograph) were also recorded for each distraction. RESULTS: Patients (N=14, F=7,M=7) had mean age of 8y10m (3y6m to 12y7m) and underwent 14 index surgeries, single rod (SR) in 5, dual rod (DR) in 9 and 68 distractions. Diagnosis was idiopathic 5, neuromuscular 4, congenital 2, syndromic 2 and NF one. Mean FU was 9 months (4-15). Average distraction achieved was 4.2 mm per patient. The average time between index surgery and the first distraction was 66 days (28-185) and thereafter was 43 days (23-184). Complications included superficial infection in 1 (SR), prominent implant in 1 (DR) and minimal loss of initial length in 3 (21%) index surgery (all SR). Partial loss of distraction was observed following 14 of the 68 distractions (1 in DR,13 SR). This loss was regained in subsequent distractions. There was no neurologic deficit or implant failure. CONCLUSION: Preliminary results indicate that MCGR appears to be safe and provided the distraction comparable with standard GR procedure without the need for repeated surgeries. No major complications have been observed in the short follow up period …-
dc.languageengen_US
dc.publisherScoliosis Research Society.-
dc.relation.ispartofFinal Program of the 18th International Meeting on Advanced Spine Techniques, IMAST 2011en_US
dc.titleNext generation of growth-sparing techniques: preliminary clinical results of a magnetically controlled growing rod in 14 patientsen_US
dc.typeConference_Paperen_US
dc.identifier.emailCheung, KMC: cheungmc@hku.hken_US
dc.identifier.authorityCheung, KMC=rp00387en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.hkuros207276en_US
dc.identifier.spage93-
dc.identifier.epage94-
dc.publisher.placeDenmark-
dc.description.otherThe 18th International Meeting on Advanced Spine Techniques (IMAST), Copenhagen, Denmark, 13-16 July 2011. In Final Program of 18th IMAST, 2011, p. 93-94, Paper no. 75-

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