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https://www.readbyqxmd.com/read/29053084/intubation-biomechanics-validation-of-a-finite-element-model-of-cervical-spine-motion-during-endotracheal-intubation-in-intact-and-injured-conditions
#1
Benjamin C Gadomski, Snehal S Shetye, Bradley J Hindman, Franklin Dexter, Brandon G Santoni, Michael M Todd, Vincent C Traynelis, Robert P From, Ricardo B Fontes, Christian M Puttlitz
OBJECTIVE Because of limitations inherent to cadaver models of endotracheal intubation, the authors' group developed a finite element (FE) model of the human cervical spine and spinal cord. Their aims were to 1) compare FE model predictions of intervertebral motion during intubation with intervertebral motion measured in patients with intact cervical spines and in cadavers with spine injuries at C-2 and C3-4 and 2) estimate spinal cord strains during intubation under these conditions. METHODS The FE model was designed to replicate the properties of an intact (stable) spine in patients, C-2 injury (Type II odontoid fracture), and a severe C3-4 distractive-flexion injury from prior cadaver studies...
October 20, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29052813/exploration-for-reliable-radiographic-assessment-method-for-hinge-like-hypermobility-at-atlanto-occipital-joint
#2
Shinjiro Kaneko, Ken Ishii, Kota Watanabe, Takashi Tsuji, Masaya Nakamura, Morio Matsumoto, Yoshiyuki Yato, Takashi Asazuma
PURPOSE: Hinge-like hyper-mobility is occasionally observed at the atlanto-occipital (O-C1) joint. However, it has not been clear if this kind of hinge-like hyper-mobility at the O-C1 joint should be regarded as "pathologic", or referred to as "instability". To solve this issue, we aimed to establish a reliable radiographic assessment method for this specific type of O-C1 instability and figure out the "standard value" for the range of motion (ROM) of the O-C1 joint. METHODS: To figure out the standard range of the O-C1 angle, we acquired magnetic resonance imaging (MRI) sagittal views of the cervical spine for 157 healthy volunteers [average: 37...
October 20, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29040717/letter-reconsidering-bone-morphogenetic-protein-in-the-cervical-spine-selective-use-for-managing-type-ii-odontoid-fractures-in-the-elderly
#3
Francis J Jareczek, Kingsley O Abode-Iyamah, Efrem M Cox, Nader S Dahdaleh, Patrick W Hitchon, Matthew A Howard
No abstract text is available yet for this article.
October 11, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29021684/use-of-c2-vertebroplasty-and-stereotactic-radiosurgery-for-treatment-of-lytic-metastasis-of-the-odontoid-process
#4
Casey Alicen Hribar, Deb A Bhowmick
Improvements in cancer therapy have led to increased patient survival times in spite of metastatic spinal disease in many forms of cancer. Conventional treatment methods often employ radiotherapy with or without surgery depending on the neurological status, mechanical instability, and the extent of tumor. Percutaneous vertebroplasty as well as stereotactic radiosurgery (SRS) have arisen as common modalities of treatment of spinal metastasis in which neurological compromise or spinal instability and deformity is not of significant concern...
July 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29021682/spontaneous-regression-of-retro-odontoid-post-traumatic-cicatrix-following-occipitocervical-fixation
#5
Priyank Sinha, Ming-Te Lee, Sasan Panbehchi, Ankur Saxena, Debasish Pal
This case report describes a patient who presented with myelopathy secondary to a large retro-odontoid post traumatic cicatrix. The objective of this study was to discuss the clinical presentation, pathogenesis, imaging, and surgical management of pseudoarthrosis tissue mass associated with odontoid nonunion. Atlantoaxial subluxation (AAS) has been widely reported in patients with rheumatoid arthritis. AAS leads to repeated cycles of partial tear and repair of ligaments around the altantoaxial complex, resulting in the formation of periodontoid mass (pseudotumor)...
July 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29018648/os-odontoideum-a-comprehensive-clinical-and-surgical-review
#6
REVIEW
Fareed Jumah, Saja Alkhdour, Shaden Mansour, Puhan He, Ali Hroub, Nimer Adeeb, Rimal Hanif, Martin M Mortazavi, R Shane Tubbs, Anil Nanda
Os odontoideum (OO) is a rare anomaly of the odontoid process first described by Giacomini in 1886. There is considerable debate about the origin of this anomaly, whether congenital or acquired, though a growing body of evidence favors the latter. Using PubMed, we reviewed the literature on OO with regards to its etiology, clinical presentations, diagnostic modalities, and management. Manuscripts cited in reviews were also searched manually. Because the medical literature on this condition is limited, our understanding of the natural history and management of OO is still vague...
August 8, 2017: Curēus
https://www.readbyqxmd.com/read/29017980/predisposing-factors-of-fracture-nonunion-after-posterior-c1-lateral-mass-screws-combined-with-c2-pedicle-laminar-screws-fixation-for-type-ii-odontoid-fracture
#7
Hui Wang
INTRODUCTION: The aim of this study was to explore the predisposing factors for fracture nonunion after C1 lateral screw combined with C2 pedicle/laminar screw for type II odontoid fracture, and hope to provide references in decision making and surgical planning for spinal surgeons. METHODS: This is a retrospective study. By retrieving the medical records from January 2010 to July 2015 in our hospital, 117 type II odontoid fracture patients were reviewed. According to the occurrence of fracture union at the final follow up, patients were divided into two groups: Union group and Non-union group...
October 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28983222/transoral-approach-for-odontoidectomy-efficacy-and-safety
#8
Ahmed Mohamed Elbadrawi, Tameem Mohamed Elkhateeb
BACKGROUND: Odontoid process pathologies can cause upper motor neuron lesions. These pathologies can be approached through either a high retropharyngeal approach or a transoral approach. The introduction of the surgical microscope, proper instrumentations, and proper antibiotics has increased utilization of the transoral approach. QUESTIONS/PURPOSES: Our approach to anterior odontoid resection through transoral approach for different pathologies resulting in compression the cervical cord or causing craniocervical instability is described here...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28962628/percutaneous-anterior-c1-2-transarticular-screw-fixation-salvage-of-failed-percutaneous-odontoid-screw-fixation-for-odontoid-fracture
#9
Ai-Min Wu, Hai-Ming Jin, Zhong-Ke Lin, Yong-Long Chi, Xiang-Yang Wang
BACKGROUND: The objective of this study is to investigate the outcomes and safety of using percutaneous anterior C1/2 transarticular screw fixation as a salvage technique for odontoid fracture if percutaneous odontoid screw fixation fails. METHODS: Fifteen in 108 odontoid fracture patients (planned to be treated by percutaneous anterior odontoid screw fixation) were failed to introduce satisfactory odontoid screw trajectory. To salvage this problem, we chose the percutaneous anterior C1/2 transarticular screw fixation technique in treatment of these patients...
September 29, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28922277/percutaneous-posterior-trans-articular-atlantoaxial-fixation-for-the-treatment-of-odontoid-fractures-in-the-elderly-a-prospective-study
#10
Mohamed Alhashash, Mootaz Shousha, Hany Gendy, Ahmed Samir Barakat, Heinrich Boehm
STUDY DESIGN: A prospective study of 20 multimorbid patients older than 65 years undergoing minimally invasive surgical treatment for odontoid fracture. OBJECTIVES: To analyze the results of percutaneous transarticular atlantoaxial screw fixation as a new minimally invasive treatment modality in this high risk group of patients. SUMMARY OF BACKGROUND DATA: Odontoid fractures are a common injury pattern in the elderly. These fractures typically present significant challenges as geriatric patients often have multiple comorbidities that may adversely affect fracture management...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28913395/simultaneous-bilateral-total-hip-arthroplasty-in-morquio-syndrome
#11
Imran Ilyas, Syed Kashif, Samar Rabbani, Husam A Alrumaih
A 16-year-old girl who had Morquio syndrome presented with severe bilateral hip pain and limited mobility because of bilateral hip osteoarthritis and fixed flexion deformities. She was wheelchair bound for the previous 6 months. Cervical spine flexion-extension views showed mild subluxation (<3 mm), and there was thoracolumbar spine kyphosis. Magnetic resonance imaging of the cervical and thoracolumbar spine showed hypoplasia of the odontoid and vertebral bodies, but no spinal cord compression. Bilateral cemented total hip arthroplasty was performed through a posterior approach under general anesthesia with fiberoptic intubation...
September 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28902102/post-traumatic-spinal-hygroma-causing-cord-compression-in-type-iii-odontoid-fracture-with-vertical-atlantoaxial-instability
#12
Salvatore Russo, Antonio Belli, Andy Eynon, Ali Nader-Sepahi
STUDY DESIGN: Case report. OBJECTIVE: To report the first case in the literature of a traumatic cervical spine subdural cerebrospinal fluid (CSF) collection (hygroma) under tension causing cord compression. We suggest etiopathogenesis and modality of treatment. SUMMARY OF BACKGROUND DATA: Hygromas are subdural cranial CSF collection. A literature review showed no previous published case of post-traumatic spinal hygroma. This was a potential life-threatening sequelae of a high cervical injury that warranted early diagnosis and emergency treatment...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28881111/biomechanical-comparison-of-inter-fragmentary-compression-pressures-lag-screw-versus-herbert-screw-for-anterior-odontoid-screw-fixation
#13
Jin-Woo Park, Kyoung-Tae Kim, Joo-Kyung Sung, Seong-Hyun Park, Ki-Woong Seong, Dae-Chul Cho
OBJECTIVE: The purpose of the present study was to compare inter-fragmentary compression pressures after fixation of a simulated type II odontoid fracture with the headless compression Herbert screw and a half threaded cannulated lag screw. METHODS: We compared inter-fragmentary compression pressures between 40- and 45-mm long 4.5-mm Herbert screws (n=8 and n=9, respectively) and 40- and 45-mm long 4.0-mm cannulated lag screws (n=7 and n=10, respectively) after insertion into rigid polyurethane foam test blocks (Sawbones, Vashon, WA, USA)...
September 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28879900/simultaneous-odontoid-excision-with-bilateral-posterior-c1-2-distraction-and-stabilization-utilizing-bilateral-posterolateral-corridors-and-a-single-posterior-midline-incision
#14
Arun K Srivastava, Sanjay Behari, Jayesh Sardhara, Kuntal Kanti Das
A simultaneous odontoid decompression and bilateral posterior atlanto-axial facetal distraction, C1-2 joint spacer/bone graft placement and stabilization may be performed utilizing the 'posterior-only' approach. This procedure may be performed utilizing a single posterior midline incision, a bilateral posterior approach to the C1-2 facet joints and a bilateral posterolateral approach to the odontoid process and C2 body. It may be carried out in situations where a C1-2 non-reduction/partial reduction using a 'posterior alone' procedure is anticipated due to the complex bony/soft tissue configuration anterior at the thecal sac existing at the cervicomedullary junction...
September 2017: Neurology India
https://www.readbyqxmd.com/read/28864483/cadaveric-study-of-movement-in-the-unstable-upper-cervical-spine-during-emergency-management-tracheal-intubation-and-cervical-spine-immobilisation-a-study-protocol-for-a-prospective-randomised-crossover-trial
#15
Shiyao Liao, Erik Popp, Petra Hüttlin, Frank Weilbacher, Matthias Münzberg, Niko Schneider, Michael Kreinest
INTRODUCTION: Emergency management of upper cervical spine injuries often requires cervical spine immobilisation and some critical patients also require airway management. The movement of cervical spine created by tracheal intubation and cervical spine immobilisation can potentially exacerbate cervical spinal cord injury. However, the evidence that previous studies have provided remains unclear, due to lack of a direct measurement technique for dural sac's space during dynamic processes...
September 1, 2017: BMJ Open
https://www.readbyqxmd.com/read/28862040/lymphoplasmacyte-rich-meningioma-with-atypical-angiomatous-feature-and-an-increased-deposition-of-igg4-positive-plasma-cells-an-unusual-case-report
#16
Hyun-Jin Son, In Kyu Yu, Seong Min Kim
Lymphoplasmacyte-rich meningioma (LPRM) is an extremely rare variant of meningioma, and a small percentage of LPRM may be associated with IgG4-related disease. To date, the coexistence of 2 rare meningioma variants consisting of LPRM and angiomatous meningioma within one neoplasm has not been reported in the literature. A 56-year-old woman presented with episodes of frequent and severe epistaxis that began 4 months ago. Initial magnetic resonance imaging showed localized, heterogeneous, and intermediate to high signal lesion at the odontoid process and clivus...
August 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28842239/endoscopic-endonasal-odontoidectomy-with-anterior-c1-arch-preservation-in-reumathoid-arthritis-long-term-follow-up-and-further-technical-improvement-by-anterior-endoscopic-c1-c2-screw-fixation-and-fusion
#17
Maurizio Iacoangeli, Davide Nasi, Roberto Colasanti, Baogen Pan, Massimo Re, Alessandro Di Rienzo, Lucia di Somma, Mauro Dobran, Nicola Specchia, Massimo Scerrati
OBJECTIVE: To examine the long-term outcomes (minimum of 4,5 years) of endoscopic endonasal odontoidectomy (EEO) with preservation of anterior C1 ring to treat irreducible ventral bulbo-medullary compressions in rheumatoid arthritis (RA) and to illustrate a novel technique of anterior pure endoscopic craniovertebral junction (CVJ) reconstruction and fusion. In fact, long-term clinical studies are still lacking to elucidate the effective role of EEO and whether it can obviate the need for posterior fixation...
August 22, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28826707/modified-posterior-c1-lateral-mass-screw-insertion-for-type-ii-odontoid-process-fractures-using-intraoperative-ct-based-spinal-navigation-to-minimize-postoperative-occipital-neuralgia
#18
Basem Ishak, Till Schneider, R Shane Tubbs, Valerie Gimmy, Alexander Younsi, Andreas W Unterberg, Karl L Kiening
No abstract text is available yet for this article.
August 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28826656/a-morphometric-assessment-of-type-i-chiari-malformation-above-the-mcrae-line-a-retrospective-case-control-study-in-302-adult-female-subjects
#19
James R Houston, Maggie S Eppelheimer, Soroush Heidari Pahlavian, Dipankar Biswas, Aintzane Urbizu, Bryn A Martin, Jayapalli Rajiv Bapuraj, Mark Luciano, Philip A Allen, Francis Loth
PURPOSE: Type I Chiari malformation (CMI) is a radiologically-defined structural dysmorphism of the hindbrain and posterior cranial fossa (PCF). Traditional radiographic identification of CMI relies on the measurement of the cerebellar tonsils in relation to the foramen magnum with or without associated abnormalities of the neuraxis. The primary goal of this retrospective study was to comprehensively assess morphometric parameters above the McRea line in a group of female CMI patients and normal controls...
August 18, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28820364/patterns-of-c-2-fracture-in-the-elderly-comparison-of-etiology-treatment-and-mortality-among-specific-fracture-types
#20
Ingrid Radovanovic, Jennifer C Urquhart, Parham Rasoulinejad, Kevin R Gurr, Fawaz Siddiqi, Christopher S Bailey
OBJECTIVE Previous studies have focused on Type II odontoid fractures and have failed to report on the effect of other C-2 fracture types on treatment and outcome. The purpose of this study was to compare patient characteristics, cause of injury, predisposing factors to fracture, treatments, and mortality rates among C-2 fracture types in a cohort of elderly patients 70 years of age and older. METHODS A retrospective cohort study design was used. Patients who sustained a C-2 fracture between 2002 and 2011 and who were admitted to the authors' Level 1 trauma center were identified using the Discharge Abstract Database and the International Statistical Classification of Diseases and Related Health Problems (ICD-10) code S12...
August 18, 2017: Journal of Neurosurgery. Spine
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