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Lumbar instrumentation

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https://www.readbyqxmd.com/read/28719806/effect-of-cage-design-supplemental-posterior-instrumentation-and-approach-on-primary-stability-of-a-lumbar-interbody-fusion-a-biomechanical-in-vitro-study
#1
Werner Schmoelz, Sabrina Sandriesser, Oded Loebl, Marlies Bauer, Dietmar Krappinger
BACKGROUND: There are various techniques and approaches for lumbar interbody fusion differing in access, cage type and type of supplemental posterior instrumentation. While a transforaminal access usually includes a hemifacetectomy, the facet joint can be preserved with a more lateral extraforaminal access. The supplemental posterior instrumentation required for both fusion techniques is still debated. The purpose of the present study was to compare primary stability of the two accesses for two different cage types with none, unilateral and bilateral supplemental posterior instrumentation...
July 8, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28719560/perioperative-and-delayed-major-complications-following-surgical-treatment-of-adolescent-idiopathic-scoliosis
#2
Carrie E Bartley, Burt Yaszay, Tracey P Bastrom, Suken A Shah, Baron S Lonner, Jahangir Asghar, Firoz Miyanji, Amer Samdani, Peter O Newton
BACKGROUND: Reporting accurate surgical complication rates to patients and their families is important in the management of adolescent idiopathic scoliosis (AIS). In this study, we report the rate of major complications following the surgical treatment of AIS both in the perioperative period and among patients with a minimum of 2 years of follow-up. METHODS: We reviewed the prospectively collected data of a multicenter registry of patients who underwent surgical treatment of AIS during the period of 1995 to 2014 in order to identify all complications...
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28713528/the-double-transforaminal-lumbar-interbody-fusion-an-innovative-one-stage-surgical-technique-for-posterior-kyphosis-correction
#3
Marcus Jäger, Tjark Tassemeier
Posttraumatic deformities after vertebral fractures are challenging for orthopedic surgeons in the non-operative and operative field. Especially osteoporotic fractures may cause a hyperkyphosis resulting in segmental or global sagittal imbalance and chronic back pain. Different vertebral osteotomies are potent to restore sagittal profile but show a very high perioperative risk including neurological and soft tissue complications. In addition, some of these extensive operations require a two-step procedure including posterior and anterior approaches...
June 23, 2017: Orthopedic Reviews
https://www.readbyqxmd.com/read/28710046/image-guidance-to-aid-pedicle-screw-fixation-of-a-lumbar-fracture-dislocation-injury-in-a-toddler
#4
John K Houten, Jonathan Nahkla, Shashank Ghandi
BACKGROUND: Pedicle screw fixation of the lumbar spine in children less than two years of age is particularly challenging, as successful cannulation of the small pedicle dimensions require a high level of precision and there are no implants specifically designed for the infantile spine. Image-guided navigation is commonly used in adult spinal surgery and may be particularly helpful for placement of spinal screws where the bony anatomy is small and/or anatomically complex as in the upper cervical area...
July 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28703022/lumbar-idiopathic-intervertebral-disc-calcification-associated-with-ossification-of-the-ligamentum-flavum-in-adult-a-case-report
#5
Danjie Zhu, Yu Chen
A 23 year-old female was diagnosed with lumbar idiopathic intervertebral disc calcification associated with ossification of OLF. The patient underwent posterior decompression and posterolateral fusion with pedicle screw fixation, which achieved excellent clinical improvement. Surgical intervention of a posterior approach for decompression and instrumented fusion is indicated in cases that the spinal cord compression with neurologic deficits was involved.
July 13, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28700450/comparison-of-thirty-day-complications-between-navigated-and-conventional-single-level-instrumented-posterior-lumbar-fusion-a-propensity-score-matched-analysis
#6
Patawut Bovonratwet, Stephen J Nelson, Nathaniel T Ondeck, Benjamin J Geddes, Jonathan N Grauer
STUDY DESIGN: cohort comparison study. OBJECTIVE: To compare perioperative outcomes between navigated and conventional single-level instrumented posterior lumbar fusions in the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) database. SUMMARY OF BACKGROUND DATA: Although multiple studies have investigated the accuracy of pedicle screw placement and radiation exposure with navigation, no study has compared perioperative complications between navigated and conventional posterior lumbar fusion...
July 11, 2017: Spine
https://www.readbyqxmd.com/read/28692568/superior-segment-facet-joint-violation-during-instrumented-lumbar-fusion-is-associated-with-higher-reoperation-rates-and-diminished-improvement-in-quality-of-life
#7
Jay M Levin, Vincent J Alentado, Andrew T Healy, Michael P Steinmetz, Edward C Benzel, Thomas E Mroz
STUDY DESIGN: A retrospective cohort study at a single tertiary care center. OBJECTIVE: To determine the impact of superior segment facet joint violation (FJV) during lumbar fusion on reoperation rates and quality of life (QOL). SUMMARY OF BACKGROUND DATA: Although lumbar fusion is an efficacious and durable treatment for numerous spinal pathologies, adjacent segment degeneration remains a serious complication. FJV has been suggested to alter load-bearing capability and potentially contribute to adjacent segment degeneration...
July 7, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28689293/predictors-of-shoulder-level-after-spinal-fusion-in-adolescent-idiopathic-scoliosis
#8
Jan Henrik Terheyden, Mark Wetterkamp, Georg Gosheger, Viola Bullmann, Ulf Liljenqvist, Tobias Lange, Albert Schulze Bövingloh, Tobias L Schulte
BACKGROUND: For patients with adolescent idiopathic scoliosis, shoulder balance influences their treatment satisfaction and psychological well-being. Several parameters are known to affect postoperative shoulder balance, but few prognostic models are as yet available. PURPOSE: This study aimed to identify independent predictive factors that can be used to assess preoperatively which patients are at risk of postoperative shoulder elevation, and to build a linear prediction model...
July 8, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28688061/new-method-for-correction-of-lumbo-sacral-kyphosis-deformity-in-patient-with-high-pelvic-incidence
#9
Marcin Czyz, Stephen Forster, James Holton, Babak Shariati, David J Clarkson, Bronek M Boszczyk
STUDY DESIGN: Technical note. OBJECTIVE: We describe a novel technique of bilateral longitudinal sacral osteotomy allowing direct reduction of high pelvic incidence (PI) and correction of sagittal imbalance. METHODS: A 25-year-old female patient presented with a disabling lumbo-sacral kyphosis fused in situ through previous operations with residual low-grade wound infection and grade IV L5/S1 spondylolisthesis with severity index (SI) of 65%...
July 7, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28685862/sprint-mechanics-evaluation-using-inertial-sensor-based-technology-a-laboratory-validation-study
#10
Igor Setuain, Pablo Lecumberri, Juha P Ahtiainen, Antti A Mero, Keijo Häkkinen, Mikel Izquierdo
Advances in micro-electromechanical systems have turned magnetic inertial measurement units (MIMUs) into a suitable tool for vertical jumping biomechanical evaluation. Thus, the presented study aimed to determine if appropriate reliability and agreement reports could also be obtained when analysing 20m sprint mechanics. Four bouts of 20 m sprints were evaluated to determine if the data provided by a MIMU placed at the lumbar spine could reliably assess sprint mechanics and to examine the validity of the MIMU sensor compared to force plate recordings...
July 7, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28678610/occupant-responses-in-conventional-and-abts-seats-in-high-speed-rear-sled-tests
#11
David C Viano, Chantal S Parenteau, Roger Burnett, Priya Prasad
OBJECTIVE: This study compared biomechanical responses of a normally seated Hybrid III dummy on conventional and ABTS (all belts to seat) seats in 40.2 km/h (25 mph) rear sled tests. It determined the difference in performance with modern (≥2000 MY) seats compared to older (<2000 MY) seats and ABTS seats. METHODS: The seats were fixed in a sled buck subjected to a 40.2 km/h (25 mph) rear sled test. The pulse was a 15 g double-peak acceleration with 150 ms duration...
July 5, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28670415/outcomes-of-revision-surgery-following-instrumented-posterolateral-fusion-in-degenerative-lumbar-spinal-stenosis-a-comparative-analysis-between-pseudarthrosis-and-adjacent-segment-disease
#12
Seung-Pyo Suh, Young-Hoon Jo, Hae Won Jeong, Won Rak Choi, Chang-Nam Kang
STUDY DESIGN: Retrospective study. PURPOSE: We examined the clinical and radiological outcomes of patients who received revision surgery for pseudarthrosis or adjacent segment disease (ASD) following decompression and instrumented posterolateral fusion (PLF). OVERVIEW OF LITERATURE: At present, information regarding the outcomes of revision surgery for complications such as pseudarthrosis and ASD following instrumented PLF is limited. METHODS: This study examined 60 patients who received PLF for degenerative lumbar spinal stenosis and subsequently developed pseudarthrosis or ASD leading to revision surgery...
June 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28660870/the-effect-of-global-postural-reeducation-on-body-weight-distribution-in-sitting-posture-and-on-musculoskeletal-pain-a-pilot-study
#13
Fernanda De Lima E Sá Resende, Carla Vanti, Federico Banchelli, José Geraldo Trani Brandao, José Benedito Oliveira Amorim, Jorge Hugo Villafañe, Andrew Guccione, Paolo Pillastrini
OBJECTIVE: To quantify body weight distribution (BWD) in seated posture with an office chair instrumented with load cells and to evaluate the effects of ergonomic advice and Global Postural Reeducation (GPR) on seated BWD and on musculoskeletal pain. METHODS: Nineteen healthy females were randomly assigned: nine to the experimental group and 10 to the control group. Control group (CG) received only ergonomic verbal advice (EVA) regarding BWD in a seated position...
June 28, 2017: La Medicina del Lavoro
https://www.readbyqxmd.com/read/28660108/distal-fusion-level-selection-in-scheuermann-s-kyphosis-a-comparison-of-lordotic-disc-segment-versus-the-sagittal-stable-vertebrae
#14
Han Jo Kim, Venu Nemani, Oheneba Boachie-Adjei, Matthew E Cunningham, Justin A Iorio, Kevin O'Neill, Brian J Neuman, Lawrence G Lenke
STUDY DESIGN: Retrospective study. OBJECTIVE: To compare 2 methods of selecting the lowest instrumented vertebra (LIV) on the rates of revision surgery for distal junctional kyphosis (DJK) following treatment for Scheuermann's kyphosis (SK). METHODS: A retrospective review of patients who have undergone surgical treatment for SK was performed. Forty-four patients were divided into 2 groups based on intervention: Group 1 (n = 26) included patients who had an LIV distal to or at the sagittal stable vertebrae (SSV), and Group 2 (n = 18) included patients who had an LIV proximal to the SSV...
May 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28656505/videoexoscopic-real-time-intraoperative-navigation-for-spinal-neurosurgery-a-novel-co-adaptation-of-two-existing-technology-platforms-technical-note
#15
Meng Huang, Sean Michael Barber, William James Steele, Zain Boghani, Viren Rajendrakumar Desai, Gavin Wayne Britz, George Alexander West, Todd Wilson Trask, Paul Joseph Holman
Image-guided approaches to spinal instrumentation and interbody fusion have been widely popularized in the last decade [1-5]. Navigated pedicle screws are significantly less likely to breach [2, 3, 5, 6]. Navigation otherwise remains a point reference tool because the projection is off-axis to the surgeon's inline loupe or microscope view. The Synaptive robotic brightmatter drive videoexoscope monitor system represents a new paradigm for off-axis high-definition (HD) surgical visualization. It has many advantages over the traditional microscope and loupes, which have already been demonstrated in a cadaveric study [7]...
June 27, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28645672/percutaneous-pedicle-screw-placement-under-single-dimensional-fluoroscopy-with-a-designed-pedicle-finder-a-technical-note-and-case-series
#16
Fon-Yih Tsuang, Chia-Hsien Chen, Yi-Jie Kuo, Wei-Lung Tseng, Yuan-Shen Chen, Chin-Jung Lin, Chun-Jen Liao, Feng-Huei Lin, Chang-Jung Chiang
BACKGROUND CONTEXT: Minimally invasive spine surgery has become increasingly popular in clinical practice, and it offers patients the potential benefits of reduced blood loss, wound pain, and infection risk and also diminishes the loss of working time and length of hospital stay. However, surgeons require more intraoperative fluoroscopy and ionizing radiation exposure during minimally invasive spine surgery for localization, especially for guidance in instrumentation placement. In addition, computer navigation is not accessible in some facility-limited institutions...
June 20, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28632643/the-early-impact-of-postoperative-bracing-on-pain-and-quality-of-life-following-posterior-instrumented-fusion-for-lumbar-degenerative-conditions-a-randomized-trial
#17
Hany Ag Soliman, Soraya Barchi, Stefan Parent, Gilles Maurais, Alain Jodoin, Jean-Marc Mac-Thiong
STUDY DESIGN: A randomized controlled trial. OBJECTIVE: To investigate if bracing after posterior spinal instrumented fusion(PSIF) can improve pain relief and quality of life(QoL) 6 weeks and 3 months postoperatively. SUMMARY OF BACKGROUND DATA: Braces are commonly prescribed after PSIF in patients with lumbar degenerative conditions with the aim of improving pain relief and QoL. However, there is a lack of evidence on the indication for postoperative bracing, as surgeons use braces mainly based on their experience and training...
June 19, 2017: Spine
https://www.readbyqxmd.com/read/28632564/accuracy-of-percutaneous-pedicle-screw-placement-does-training-level-matter
#18
Evan O Baird, Steven J McAnany, Samuel Overley, Branko Skovrlj, Javier Z Guzman, Sheeraz A Qureshi
STUDY DESIGN: In vitro human cadaveric surgical technique study. OBJECTIVE: To assess the accuracy of percutaneous pedicle screw placement in a human cadaveric model using standard fluoroscopic guidance technique, compared across varying levels of experience. SUMMARY OF BACKGROUND DATA: The current literature varies widely in the reported frequency of facet violation during placement of percutaneous pedicle screws. However, as of yet there are no studies examining the effect that training level has on accuracy of placement...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28632559/counting-the-cost-of-failed-spinal-fusion-for-relief-of-low-back-pain-does-primary-fusion-with-bone-morphogenetic-protein-make-economic-sense-from-a-primary-payer-perspective
#19
Adam P Lloyd
STUDY DESIGN: A retrospective cohort study. OBJECTIVES: To investigate the unknown direct costs of failed instrumented lumbar fusion using iliac crest bone graft (ICBG) and subsequent reoperation utilizing recombinant human bone morphogenetic protein-2 (rhBMP-2) from a primary payer perspective. SUMMARY OF BACKGROUND DATA: Recent evidence has demonstrated increased rates of instrumented lumbar fusion and utilization of rhBMP-2 to treat a range of conditions causing lower back pain...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28631069/-s2-ala-iliac-screws-for-extended-pelvic-fixation-in-longer-lumbar-instrumentations-description-of-a-freehand-technique
#20
REVIEW
F Lattig, S Weckbach
OBJECTIVE: To reduce the rate of implant failures at the lumbosacral junction in polysegmental lumbar fusions. INDICATIONS: Spinal fusion with deformity correction including L5/S1, revision surgery for pseudoarthrosis L5/S1, screw pull-out and pedicle fractures in S1, and S1/S2 fractures after polysegmental fusions. CONTRAINDICATIONS: Osteosynthesis of complex pelvic ring fractures, tumors of the ilium. Relative contraindication: infection, to avoid contamination of the iliosacral joint...
June 19, 2017: Operative Orthopädie und Traumatologie
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