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https://www.readbyqxmd.com/read/28924145/a-novel-mouse-model-of-traumatic-optic-neuropathy-using-external-ultrasound-energy-to-achieve-focal-indirect-optic-nerve-injury
#1
Wensi Tao, Galina Dvoriantchikova, Brian C Tse, Steven Pappas, Tsung-Han Chou, Manuel Tapia, Vittorio Porciatti, Dmitry Ivanov, David T Tse, Daniel Pelaez
Traumatic optic neuropathy (TON) is a devastating cause of permanent visual loss following blunt injury to the head. Animal models for TON exist, but most fail to recapitulate the clinical scenario of closed head indirect trauma to the nerve and subsequent neurodegeneration. Thus, we developed a clinically-relevant animal model for TON using a novel ultrasonic pulse injury modality (sonication-induced TON; SI-TON). To trigger TON, a microtip probe sonifier was placed on the supraorbital ridge directly above the entrance of the optic nerve into the bony canal...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28913313/a-statistical-analysis-of-superior-orbital-fissure-width-in-korean-adults-using-computed-tomography-scans
#2
Yongsik Park, Youngjoon Kim
BACKGROUND: The superior orbital fissure is a small area that connects the middle cranial fossa and the orbit. Many studies have measured the size of the superior orbital fissure. However, there is no standard value for the size of the superior orbital fissure. Therefore, we conducted this study to provide the average size of the superior orbital fissure in Korean adults. METHODS: We measured the widths of the superior orbital fissures of 142 patients using computed tomography scans...
June 2017: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28912278/pituitary-macroadenoma-and-visual-impairment-postoperative-outcome-prediction-with-contrast-enhanced-fiesta
#3
S Hisanaga, S Kakeda, J Yamamoto, K Watanabe, J Moriya, T Nagata, Y Fujino, H Kondo, S Nishizawa, Y Korogi
BACKGROUND AND PURPOSE: Contrast-enhanced FIESTA can depict anterior optic pathways in patients with large suprasellar tumors. We assessed whether the degree of kink in the optic nerve at the optic canal orifice on contrast-enhanced FIESTA correlates with the postoperative improvement of visual impairment in patients with pituitary macroadenoma. MATERIALS AND METHODS: Thirty-one patients with pituitary macroadenoma who underwent preoperative MR imaging and an operation were evaluated...
September 14, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28910889/-clinical-features-of-traumatic-optic-neuropathy-in-265-cases
#4
M Chen, Y Jiang, J F Wen, N Li, J Qiu, N K Zhang, J B Ju
Objective: To analyze the clinical features and the pathogenetic law of traumatic optic neuropathy through epidemiologic study. Methods: 265 cases (275 eyes) with TON treated in Department of Otorhinolaryngology Head and Neck Surgery, the Affiliated Hospital of Qingdao University from April 1999 to August 2015 were retrospectively analyzed. Multiple Logistic regression analyses were used to evaluate potential prognostic factors on visual acuity. Results: TON occured mostly in young (194/265, 73.21%) man (235/265, 88...
September 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28904821/endoscopic-transnasal-suprasellar-approach-for-anterior-clinoidal-meningioma-a-case-report-and-review-of-the-literature
#5
Anas M Bardeesi, Saad Alsaleh, Abdulrazag M Ajlan
BACKGROUND: Anterior clinoidal meningiomas (ACM) are traditionally approached through transcranial routes. Due to their tendency to extend laterally and their proximity to vital neurovascular structures, the endoscopic transnasal suprasellar approach is still questionable. We present and describe an ACM case that underwent an endoscopic transnasal suprasellar approach, and provide a review of the literature and operative technique. CASE DESCRIPTION: A 56 year-old lady who presented with chronic left-sided decreased vision...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28882601/extradural-resection-of-the-anterior-clinoid-process-how-i-do-it
#6
L Troude, F Bernard, G Bauchet, S De La Rosa Morilla, P H Roche
BACKGROUND: The anterior clinoid process shares a close relationship with the optic canal, the internal carotid artery, the superior orbital fissure and the cavernous sinus. These structures may be involved in diseases whose surgical exposure requires prior clinoid process resection. METHOD: Based on operative cases we describe the different steps of this surgical technique and illustrate our surgical procedure with a video. Dividing the orbito-temporal periosteal fold is a key-step in order to optimize the elevation of the periosteal dural layer at the level of the superior orbital fissure to expose the contours of the anterior clinoid process...
September 4, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28881110/endoscopic-spine-surgery
#7
REVIEW
Gun Choi, Chetan S Pophale, Bhupesh Patel, Priyank Uniyal
Surgical treatment of the degenerative disc disease has evolved from traditional open spine surgery to minimally invasive spine surgery including endoscopic spine surgery. Constant improvement in the imaging modality especially with introduction of the magnetic resonance imaging, it is possible to identify culprit degenerated disc segment and again with the discography it is possible to diagnose the pain generator and pathological degenerated disc very precisely and its treatment with minimally invasive approach...
September 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28857943/visibility-of-optic-nerve-head-structures-with-spectral-domain-and-swept-source-optical-coherence-tomography
#8
Mónica M Loureiro, Jayme R Vianna, Vishva M Danthurebandara, Glen P Sharpe, Donna M Hutchison, Marcelo T Nicolela, Balwantray C Chauhan
PURPOSE: To compare the visibility of deep optic nerve head (ONH) structures and the visible area of the anterior surface of the lamina cribrosa (ASLC) with spectral-domain optical coherence tomography (SD-OCT) and swept-source OCT (SS-OCT). MATERIALS AND METHODS: In total, 33 glaucoma patients were imaged with SD-OCT (Spectralis, 24 radial B-scans centered on the ONH) and SS-OCT (Atlantis, 12 radial and a horizontal and vertical raster scan pattern containing 5 lines each, centered on the ONH)...
September 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28845305/optical-coherence-tomography-observation-of-gonio-structures-during-microhook-ab-interno-trabeculotomy
#9
Masaki Tanito
INTRODUCTION: Intraoperative observation of ocular structures using microscope-integrated optical coherence tomography (iOCT) has been adopted recently. I report my initial feasibility assessment of iOCT for the incised trabecular meshwork observation during microhook ab interno trabeculotomy. CASE SERIES: Both the nasal and temporal sides or either side of the trabecular meshwork/inner wall of Schlemm's canal was incised more than 3 clock hours. After then, under observation using a Swan-Jacob gonioprism lens with the real-time 5-line scan mode, OCT images of the area were successfully acquired in 10 (83%) of 12 sides in nine eyes...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28841585/optic-disc-drusen-in-children-the-copenhagen-child-cohort-2000-eye-study
#10
Lasse Malmqvist, Xiao Qiang Li, Christina L Eckmann, Anne M Skovgaard, Else M Olsen, Michael Larsen, Inger C Munch, Steffen Hamann
BACKGROUND: Optic disc drusen (ODD) are seen in up to 2.4% of the general population, but the etiology and pathophysiology of the condition is still unknown. The purpose of this study was to determine the prevalence of ODD in a population-based child cohort and to determine if scleral canal diameter and fetal birth and pubertal parameters are associated with the presence of ODD. METHODS: This observational, longitudinal population-based birth cohort study, with a nested case-control, included 1,406 children...
August 24, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28830435/non-linear-optical-microscopy-of-cartilage-canals-in-the-distal-femur-of-young-pigs-may-reveal-the-cause-of-articular-osteochondrosis
#11
Andreas Finnøy, Kristin Olstad, Magnus B Lilledahl
BACKGROUND: Articular osteochondrosis is a common cause of leg weakness in pigs and is defined as a focal delay in the endochondral ossification of the epiphysis. The first demonstrated steps in the pathogenesis consist of loss of blood supply and subsequent chondronecrosis in the epiphyseal growth cartilage. Blood vessels in cartilage are located in cartilage canals and become incorporated into the secondary ossification centre during growth. It has been hypothesized that vascular failure occurs during this incorporation process, but it is not known what predisposes a canal to fail...
August 22, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28822724/finding-the-ledge-sagittal-analysis-of-bony-landmarks-of-the-orbit
#12
Peter J J Gooris, Barbara S Muller, Leander Dubois, Jan E Bergsma, Gertjan Mensink, Maaike F E van den Ham, Alfred G Becking, Karlien Seubring
PURPOSE: This study determined the average distances and angles between anatomic landmarks within the orbit, with an emphasis on localization of the orbital process of the palatine bone. This information will help the surgeon with treatment planning and surgical procedures. PATIENTS AND METHODS: Four anatomic landmarks were identified retrospectively on computed tomograms of 100 adult Caucasian patients (50 men and 50 women): the top of the infraorbital margin superior to the infraorbital foramen (point A), the top of the orbital process of the palatine bone (point B), the anteriormost bony portion of the superior orbital fissure (point C), and the ventrolateral aspect of the bony entrance of the optic canal (point D)...
July 25, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28762040/case-update-on-cranial-osteopetrosis-which-is-the-role-of-the-neurosurgeon
#13
Irene Stella, Matthieu Vinchon, Pierre Guerreschi, Eva De Berranger, Ikram Bouacha
PURPOSE: Osteopetrosis (OP) is a rare skeletal disease, which can affect the skull base and calvaria. A multidisciplinary approach is mandatory and patient may need neurosurgical care. Few observations have been published, and optimal management of OP is not established yet. METHOD: We report a case of an infant with OP diagnosed at 5 months, who presented signs of intracranial hypertension associated with unilateral blindness. Bone marrow allograft was performed at 6 months of age...
July 31, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28757696/can-pneumocephalus-present-as-flashes-of-light-a-rare-case-report
#14
Santanu Ghosh, Menon P Jayasree, Mathew Biju, Basu Snehanshu
Orbital emphysema and associated pneumocephalus usually result from trauma to orbital bones or due to sinus disease, allowing air to travel from paranasal sinus into orbit and brain. However, it is extremely rare to have orbital emphysema and pneumocephalus in the absence of orbital wall fracture. In our case, a young male was admitted with severe eye pain, diminution of vision due to sudden exposure of compressed air gun. Examination revealed proptosed, emphysematous right eye with conjunctival laceration...
May 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/28757248/response-characteristics-of-the-cat-somatosensory-cortex-following-the-mechanical-stimulation-to-non-vital-and-vital-canine
#15
Jianxiang Tao, Duo Wang, Jie Ran, Anqi Jin, Hongbo Yu
Patients sometimes complain that non-vital teeth after root canal treatment (RCT) are paresthesia compared with vital teeth, and previous psychological studies on the tactile sensibility of non-vital teeth remained controversial. In the present study, intrinsic signal optical imaging, which served as an objective tool, was employed to compare the cortex response characteristics following forces applied to the cat non-vital and vital canines. Based on the evoked cortical responses, the response threshold, signal strength, spatial pattern, temporal dynamics and the preference of force direction, they were not significantly different between vital and non-vital canines...
July 28, 2017: Neuroscience
https://www.readbyqxmd.com/read/28749847/optic-canal-decompression-with-unexpected-changes-in-cerebrospinal-fluid-of-the-optic-canal
#16
Ende Wu, Wencan Wu
Optic neuritis is a common inflammatory disease of the optic nerve. And the cerebral spinal fluid (CSF) in the subarachnoid space of optic nerve is thought to be homogeneous as in spine. We report a case of optic neuritis, some unexpected opaque fluid observed to flow out from the optic canal during the optic canal decompression surgery when the CSF in spine is normal. One day after the surgery, the visual acuity of the patient improved dramatically to 0.4 from 0.05. This report highlights the possible restrictive pathological changes of the CSF in the optic nerve of acute optic neuritis, which may be the reason of the dysfunction of the optic nerve...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28749846/three-dimensional-radiologic-study-on-index-measurement-of-endonasal-endoscopic-optic-nerve-decompression
#17
Yao Zhao, Haobo Duan, Jianming Liu, Kailiang Cheng, Yingying Han, Youqiong Li
OBJECTIVE: To provide the radiologic basis for the clinical application of endonasal endoscopic optic nerve decompression (EEOND). METHODS: CTA images were used to observe the optic canal (OC) and related structures of 60 patients (120 sides) with normal nasal, paranasal sinuses, OC, and other related structures. RESULTS: Optic canal could be classified as: the canal (10 sides, 8.33%), the semicanal (25 sides, 20.83%), the impression (49 sides, 40...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28729783/cytotoxic-evaluation-of-a-new-ceramic-based-root-canal-sealer-on-human-fibroblasts
#18
Sandra Chakar, Sylvie Changotade, Nada Osta, Issam Khalil
OBJECTIVES: The purpose of this study was to evaluate the cytotoxicity of a new bioceramic-based root canal sealer (BioMM) by direct and indirect contact with human fibroblasts and to compare it with a zinc oxide-eugenol sealer, the Pulp Canal Sealer-extended working time (PCS-EWT). MATERIALS AND METHODS: Cell viability was assessed through direct and indirect contact between human fibroblasts and sealer. Direct contact was performed at 24 h, whereas the indirect contact was performed at 24 and 48 h at different concentrations: 100%, 50%, and 25%...
April 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28724827/angioid-streaks-in-a-case-of-camurati-engelmann-disease
#19
Bet L Tugcu, Taha Sezer, Ahmet Elbay, Hakan Özdemir
Camurati-Engelmann disease (CED) is a rare autosomal dominant disease with various phenotypic expressions. The hallmark of the disease is bilateral symmetric diaphyseal hyperostosis of the long bones with progressive involvement of the metaphysis. Ocular manifestations occur rarely and mainly result from bony overgrowth of the orbit and optic canal stenosis. We report a case of CED showing angioid streaks (ASs) in both fundi with no macular involvement and discuss the possible theories of the pathogenesis of AS in this disease...
July 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28708139/geometric-phase-morphology-of-jones-matrices
#20
Dorilian Lopez-Mago, Arturo Canales-Benavides, Raul I Hernandez-Aranda, Julio C Gutiérrez-Vega
We demonstrate an innovative technique based on the Pancharatnam-Berry phase that can be used to determine whether an optical system characterized by a Jones matrix is homogeneous or inhomogeneous, containing orthogonal or nonorthogonal eigenpolarizations, respectively. Homogeneous systems have a symmetric geometric phase morphology showing line dislocations and sets of polarization states with an equal geometric phase. In contrast, the morphology of inhomogeneous systems exhibits phase singularities, where the Pancharatnam-Berry phase is undetermined...
July 15, 2017: Optics Letters
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