final program

SCOLIOSIS RESEARCH SOCIETY presents

24th IMAST

INTERNATIONAL MEETING  ON ADVANCED SPINE TECHNIQUES

JULY 12-15, 2017 SOUTH AFRICA

CAPE TOWN INTERNATIONAL CONVENTION CENTRE

FINAL PROGRAM

IMAST Committee Ronald A. Lehman, Jr., MD, Chair Henry F.H. Halm, MD, Co-Chair Andrew H. Jea, MD Dean Chou, MD D. Kojo Hamilton, MD Mun Keong Kwan, MBBS, MS Orth Robert Lee, BSc, MBBS, MRCS, FRCS Ibrahim A. Omeis, MD Juan S. Uribe, MD Jeffrey Dean Coe, MD Yong Hai, MD David H. Clements, III, MD Hossein Mehdian, MD, FRCS(Ed) Stefan Parent, MD, PhD

www.srs.org/imast2017

MEETING AGENDA

† = Whitecloud Award Nominee – Best Clinical Paper * = Whitecloud Award Nominee – Best Basic Science Paper

Thursday, July 13, 2017 09:51 - 09:55

Paper 8 Closed Reduction of Cervical Facet Dislocations a New Take on an Old Technique†

09:55 - 09:59

Paper 9 Safety of a High-Dose Tranexamic Acid Protocol in Complex Adult Spinal Deformity Analysis of 100 Consecutive Cases†

Johannes H. Davis, MMed(Orth), FCOrth (SA); De La Rey HS Badenhorst; Moosa Ahmed Farouk Mohideen; Maarten Potgieter

James D Lin, MD; Lawrence G. Lenke, MD; Jamal Shillingford, MD; Joseph Lawrence Laratta, MD; Lee A Tan; Charla R. Fischer, MD; Ronald A. Lehman, MD

10:35 - 11:05

09:59 - 10:09

Discussion

10:09 - 10:14

Introduction of the President

10:14 - 10:29

Presidential Keynote Address

10:29 - 10:35

Preview of the 52nd Annual Meeting and 25th IMAST 52nd Annual Meeting – Philadelphia, PA, USA 25th IMAST - Los Angeles, CA, USA

Todd J. Albert, MD Kenneth MC Cheung, MD

Refreshment Break & Exhibit Viewing Case Presentations in Exhibit Hall

11:05 - 12:30

Concurrent Sessions 2A-C: Abstract Sessions

11:05 - 12:30

2A. Whitecloud Basic Science Nominees and Top-Scoring Abstracts AUDITORIUM I Moderators: Kenneth MC Cheung, MD & Justin S. Smith, MD, PhD

11:05 - 11:09

Paper 10 Improved Clinical Outcomes of Intraoperative Lumbar Nerve Root Monitoring Changes Using Motor Evoked Potentials During Thoracolumbar Spinal Surgery* Earl D. Thuet, B.S., CNIM; Lee Tan; Anil Mendiratta, MD; Moosa Ahmed Farouk Mohideen; Paul,F Kent, MD, PhD; Ronald A. Lehman, MD; Yongjung J. Kim, MD; Charla R. Fischer, MD; Mark Weidenbaum, MD; Lawrence G. Lenke, MD

11:09 - 11:13

Paper 11 Changes in Cervical Facets Orientation During Child Growth*

11:13 - 11:17

Paper 12 Locally Applied Simvastatin as an Adjunct to Promote Spinal Fusion in Rats*

11:17 - 11:26

Discussion

11:26 - 11:30

Paper 13 Widening of the Safe Trajectory Range During Subaxial Cervical Pedicle Screw Placement: Advantages of a Curved Pedicle Probe and Laterally Located Starting Point without Creating a Funnel-Shaped Hole

Sebastien Pesenti; Renaud Lafage; Benjamin Blondel; Emilie Peltier, MD; Elie Choufani, MD; Jean-Luc Jouve, MD, PhD Sravisht Iyer, MD; Patrick, E Donnelly, PhD; George Spaniel BS; Matthew E. Cunningham, MD, PhD

Jin Hoon Park; Subum Lee

11:30 - 11:34

Paper 14 Neurologic Deficits and MRI Characteristics of Syrinx in Idiopathic Syringomyelia Related Scoliosis*

11:34 - 11:38

Paper 15 Impact of Type of Screw on Kyphotic Deformity Correction after Spine Fracture Fixation- Cannulated versus Solid Pedicle Screw*

Haining Tan; Fan Feng; Youxi Lin, MD; Xingye Li, MD; Chong Chen, MD; Jianxiong Shen, MD

Abduljabbar Alhammoud, MD; Mahmood Arbash; Ashik, M Parambathkandi; Ohmed Khilji; Abdul Moeen Baco

11:38 - 11:47

Discussion

11:47 - 11:51

Paper 16 A 20-Year Analysis of AIS Patient Incidence of Critical Changes and Predictive Factors to Define Patients at Risk Daniel J. Sucato, MD, MS; Kiley Poppino, BS; Alec, S Thoveson; Ali Parsa; Steven, P Sparagana, MD; Patricia Rampy, MS, CNIM

FINAL PROGRAM

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PAPER ABSTRACTS

† = Whitecloud Award Nominee – Best Clinical Paper * = Whitecloud Award Nominee – Best Basic Science Paper

Results 172 cases with traumatic thoracolumbar fracture underwent pedicle screw fixation (Open vs MIS) either with CS or SCS. 142 males and 28 females, average age 36.1 ± 12.4 years, 100 open and 72 MIS, 76 solid and 96 cannulated screws. The average pre-operative, intra-operative and postoperative kyphotic angle of the fractured vertebra was respectively 18.9 ± 9.9 (range from 1 to 90), 7.4 ± 6.7 (range from 0 to 40) and 8.1 ± 6.5 (range from 0 to 40) degrees and an average 13.08 degree angle reduction was quantified with solid screws and 8.96 degrees with cannulated screws. Average height reduction in the pre-operative and post-operative stages showed a wide difference which indicated a successful height gain after surgery, and this is supported statistically while performing ANOVA (p < 0.05) in solid groups compared to cannulated screw procedure performed. Conclusion Solid screws are found to be superior in the increased correction of kyphotic angle and the height of the fractured vertebra comparing to cannulated ones. 15. Impact of Type of Screw on Kyphotic Deformity Correction after Spine Fracture Fixation- Cannulated versus Solid Pedicle Screw* Abduljabbar Alhammoud, MD; Mahmood Arbash; Ashik M. Parambathkandi; Ohmed Khilji; Abdul Moeen Baco Summary Retrospective case series of 172 patients with traumatic thoracolumbar fracture fixed by solid or cannulated screw to detect the impact of type of screw on kyphotic deformity correction Hypothesis Solid screws are superior to cannulated screws in the increased correction of kyphotic angle and the height of the fractured vertebra. Design Retrospective case series Introduction Spine fractures result from multiple causes particularly fall from heights and road traffic accidents. It is a major cause of disability if not treated properly. Many advocates are in favor of pedicle fixation method, considering it a comparatively safer procedure when compared to the riskier non-pedicle counterpart. Open spine surgery is known to have several limitations which include blood loss, elongated post-operative pain and disability risk. Minimal incision techniques were, therefore, a ‘looked-for’ advancement. Pedicle screw can be Polyaxial cannulated screw or Monoaxial solid screw. Our aim is to explore and find out if the screw design differences will affect the correction of the deformity after the fixation of unstable spine fractures Methods Retrospective case series of all pedicle screw fixation for traumatic thoracolumbar fractures (Open vs. MIS) in Hamad General Hospital, Doha, Qatar. The use of cannulated screws (CS) and solid core screws (SCS) during the two surgical modes named ‘traditional open’ (OPEN) and ‘minimally invasive’ (MISS) are considered for the study. The data comprised of patient details for five years from 2011 to 2015.

16. A 20-Year Analysis of AIS Patient Incidence of Critical Changes and Predictive Factors to Define Patients at Risk Daniel J. Sucato, MD, MS; Kiley Poppino, BS; Alec S. Thoveson; Ali Parsa; Steven P. Sparagana, MD; Patricia Rampy, MS, CNIM Summary The incidence of critical neuromonitoring changes in a consecutive series of 1605 patients was 2.24%, predominantly during deformity. Risk factors were older age, longer surgery, larger curves and ant/post surgery. The timely response by the surgical team resulted in no permanent neurologic event as long as blunt trauma to the cord was avoided. Modern IONM monitoring prevents permanent neurologic deficits with an incidence of 0.06% Hypothesis Multimodal use of intraoperative neuromonitoring is associated with a low incidence of permanent postoperative neurological deficits in AIS due to careful and rapid response to critical changes Design Retrospective chart review Introduction In AIS surgery, critical intraoperative neuromonitoring (IONM) changes are uncommon and permanent deficits are rare. Few studies identify risk factors for these changes or strategies to limit their occurrence. Methods A retrospective review of a consecutive series of AIS patients at a single institution undergoing a posterior surgery using SSEP, NMEP and TcMEP monitoring was performed over an 18year period. Risk factors, responses to changes and ultimate outcome were determined. Results There were 1605 patients who were 14.57 years at surgery with 80.9% female and a major preoperative Cobb of 60.8 . Critical IONM changes occurred in 36 (2.24%) patients- 28 girls/ 8 boys. The changes were motor (39%), sensory (11%), and motor/sensory (50%) and occurred during anchor placement (22%), corrective maneuvers (56%), anesthetic event (8.3%) and other (13.8%). Preoperative MRI was ordered in more patients in the

FINAL PROGRAM

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