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clinical differences will develop. Neurosurg Focus Neurosurgical Focus FOC 1092-0684 American Association of Neurological Surgeons 2013.1.FOC-LSRSABSTRACTS Poster Abstract Poster 3. Use Of Recombinant Human Bone Morphogenetic Protein-2 (rhBMP-2) Without Iliac Crest Bone Graft In Posterolateral Lumbar Spine Fusion (PLF) Daniel K. Park , MD , Sung Soo Kim , and Scott Boden , MD William Beaumont Hospital, Orthopedic Surgery, Southfield, MI 1 2013 34 1 The Science of Neurosurgical Practice A2

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Vishwajeet Singh, Tarush Rustagi and Robert Hart

S acral fractures may result in pelvic deformity as well as loss of lower-extremity, bowel, and bladder function. Notably, H-type sacral fractures are unstable and are referred to as sacropelvic dissociation, in which the upper sacral fragment with the lumbar spine freely rotates in relation to the distal segment due to unopposed forces exerted by psoas muscle and gravity. 2 , 3 , 7 , 9 , 10 , 17 , 20 Malunion may alter the sacropelvic relationship and results in alteration of pelvic indices. The resulting loss of sagittal balance brings a mechanical

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SP was widest at 11.09 ± 2.85 mm. L5 had a slope of 23.68 ± 10.51 degrees relative to the mechanical axis, which was steeper than other levels. At L2-L5, more SPs have convex morphology. Conversely, L1 exhibits convex morphology only 38.7% of the time ( Table 1 ). Discussion: Past studies have examined the quantitative anatomy of the lumbar spine as it pertains to pedicle fixation for posterior spinal fusions. Little work, however, has been done to examine lumbar spinous processes and their variable morphology. Spinous process length, width, height and slope

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effective and safe to use in well-selected ASD patients and lays the foundation for further studies on this important topic. Neurosurg Focus Neurosurgical Focus FOC 1092-0684 American Association of Neurological Surgeons 10.3171/2017.4.FOC-LSRSabstracts 2017.4.FOC-LSRSABSTRACTS Abstract Paper 02. Comparison of Bleeding vs Clotting Complications after Lumbar Spine Surgery Haroutioun Boyajian , MD 1 , Olumuyiwa Idowu , BA 2 , William Mosenthal , MD 1 , Lewis Shi , MD 1 , and Michael

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) within three months after surgery for degenerative lumbar spine conditions. Materials/Methods: Patients who underwent decompressive laminectomy and/or arthrodesis for degenerative lumbar spine conditions at two affiliated tertiary care centers between 2005 and 2015 were identified. Inclusion criteria were patients 18 years or older with at least 90 days of clinical follow-up. Exclusion criteria: tumor, fracture, trauma, pseudarthrosis, or preexisting infection. Primary outcome measure was SSI within 90 days after surgery requiring incision and debridement

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Natalie Zusman, Jacqueline L. Munch, Alexander Ching, Robert Hart and Jung Yoo

, Diwan S , Singh V , Falco FJ , : The effectiveness of lumbar interlaminar epidural injections in managing chronic low back and lower extremity pain . Pain Physician 15 : E363 – E404 , 2012 2 Botwin K , Brown LA , Fishman M , Rao S : Fluoroscopically guided caudal epidural steroid injections in degenerative lumbar spine stenosis . Pain Physician 10 : 547 – 558 , 2007 3 Buttermann GR : Treatment of lumbar disc herniation: epidural steroid injection compared with discectomy. A prospective, randomized study . J Bone Joint Surg Am 86

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Michael P. Kelly, Lukas P. Zebala, Han Jo Kim, Daniel M. Sciubba, Justin S. Smith, Christopher I. Shaffrey, Shay Bess, Eric Klineberg, Gregory Mundis Jr., Douglas Burton, Robert Hart, Alex Soroceanu, Frank Schwab, Virginie Lafage and International Spine Study Group

ALLO blood transfused was associated with an increased risk of infection in lumbar spine surgeries, suggesting a dose-response effect from ALLO PRBC transfusion. 26 This cohort consisted of lumbar procedures only, however. The immunomodulatory effects of ALLO blood exposure have been confirmed, and further study within the ASD population is needed. 24 , 25 A methodical approach to PABD, with patients identified by demographic data and anticipated EBL, is needed. Some patients are unlikely to require any transfusion, whereas others are likely to require more blood

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Virginie Lafage, Frank Schwab, Shaleen Vira, Robert Hart, Douglas Burton, Justin S. Smith, Oheneba Boachie-Adjei, Alexis Shelokov, Richard Hostin, Christopher I. Shaffrey, Munish Gupta, Behrooz A. Akbarnia, Shay Bess and Jean-Pierre Farcy

but also pelvic parameters to a variable degree. A linear correlation between osteotomy degree and pelvic correction was not expected. Methods Patient Selection This is a multicenter retrospective study (8 institutions in the US) that was approved by each institutional review committee. Inclusion criteria included any adult patient (> 20 years old at time of surgery) with a documented regional or global sagittal plane deformity ( Table 1 ) who underwent surgical treatment including a PSO in the lumbar spine (L1–5). Exclusion criteria included any patient

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Christopher P. Ames, Justin S. Smith, Justin K. Scheer, Christopher I. Shaffrey, Virginie Lafage, Vedat Deviren, Bertrand Moal, Themistocles Protopsaltis, Praveen V. Mummaneni, Gregory M. Mundis Jr., Richard Hostin, Eric Klineberg, Douglas C. Burton, Robert Hart, Shay Bess, Frank J. Schwab and the International Spine Study Group

) is used for Grade 2 osteotomies, but these may be performed in combination with an anterior soft-tissue release (Modifiers AP, PA, APA, or PAP). F ig . 3. A: Grade 2 osteotomy, complete facet joint/Ponte osteotomy. B: Preoperative and postoperative radiographs of a patient treated with multilevel complete facet resection and posterior segmental instrumentation and fusion from C2–T2. The classification for this case is 2P (with no minor osteotomies). Numerous previous reports have described osteotomy techniques for the lumbar spine that are commonly

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Alexander A. Theologis, Gregory M. Mundis Jr., Stacie Nguyen, David O. Okonkwo, Praveen V. Mummaneni, Justin S. Smith, Christopher I. Shaffrey, Richard Fessler, Shay Bess, Frank Schwab, Bassel G. Diebo, Douglas Burton, Robert Hart, Vedat Deviren and Christopher Ames

approach is an attractive option for achieving interbody fusion in ASD, as it provides minimally invasive access to the lumbar spine/thoracolumbar junction and is associated with less blood loss, avoids direct neural manipulation, and puts less physiological stress on patients compared with multilevel ALIF and TLIF. 9 , 28 , 35 , 36 , 38 The goal of this investigation was to evaluate the utility of supplementing long thoracolumbar open PSF with multilevel LIF of the lumbar/thoracolumbar curve apex in ASD. As each deformity and associated operation is unique, this study