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temporal bone trauma

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https://www.readbyqxmd.com/read/29890895/otopathologic-changes-in-the-cochlea-following-head-injury-without-temporal-bone-fracture
#1
Reuven Ishai, Renata M Knoll, Jenny X Chen, Kevin Wong, Katherine L Reinshagen, Joseph B Nadol, Aaron K Remenschneider, David H Jung, Elliott D Kozin
Objective Hearing loss following temporal bone (TB) fracture may result from direct transection of the middle and inner ear. The pathophysiology of hearing loss due to head injury without TB fracture, however, is not well understood. Few reports describe otopathologic findings. Herein, we investigate the pathologic findings of patients who sustained a head injury without evidence of a TB fracture. Study Design Otopathology study. Setting Otopathology laboratory. Subjects Subjects with a history of head injury without TB fracture...
June 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29889081/hypoglossal-facial-nerve-side-to-side-neurorrhaphy-for-facial-paralysis-resulting-from-closed-temporal-bone-fractures
#2
Diya Su, Dezhi Li, Shiwei Wang, Hui Qiao, Ping Li, Binbin Wang, Hong Wan, Michael Schumacher, Song Liu
BACKGROUND: Closed temporal bone fractures due to cranial trauma often result in facial nerve injury, frequently inducing incomplete facial paralysis. Conventional hypoglossal-facial nerve end-to-end neurorrhaphy may not be suitable for these injuries because sacrifice of the lesioned facial nerve for neurorrhaphy destroys the remnant axons and/or potential spontaneous innervation. OBJECTIVE: we modified the classical method by hypoglossal-facial nerve "side"-to-side neurorrhaphy using an interpositional predegenerated nerve graft to treat these injuries...
June 6, 2018: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/29888114/mechanical-evaluation-of-retinal-damage-associated-with-blunt-craniomaxillofacial-trauma-a-simulation-analysis
#3
Xiaoqi Geng, Xiaoyu Liu, Wei Wei, Yawei Wang, Lizhen Wang, Kinon Chen, Hongqiang Huo, Yuanjie Zhu, Yubo Fan
Purpose: To evaluate retinal damage as the result of craniomaxillofacial trauma and explain its pathogenic mechanism using finite element (FE) simulation. Methods: Computed tomography (CT) images of an adult man were obtained to construct a FE skull model. A FE skin model was built to cover the outer surface of the skull model. A previously validated FE right eye model was symmetrically copied to create a FE left eye model, and both eye models were assembled to the skull model...
May 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29870840/middle-cranial-fossa-approach-to-repair-tegmen-defects-with-autologous-or-alloplastic-graft
#4
Stanley Hoang, Michael J Ortiz Torres, Arnaldo L Rivera, N Scott Litofsky
BACKGROUND: Temporal bone tegmen defects may be associated with cerebrospinal fluid (CSF) otorrhea. A variety of techniques have been used for repair. We report our experience with skull base reconstruction for tegmen defects using either autologous or alloplastic grafts. METHODS: A retrospective chart review was performed on patients with tegmen defects treated from 2007 to 2017 at the University Hospital in Columbia, MO. Primary outcome measures were analyzed...
June 2, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29863561/the-outcome-analysis-of-traumatic-facial-nerve-palsy-treated-with-systemic-steroid-therapy
#5
Ping-Hsun Lee, Chi-Cheng Liang, Shiang-Fu Huang, Han-Tsung Liao
PURPOSE: Although facial nerve palsy is uncommon after a blunt craniofacial injury, it will result in functional and aesthetic disability if full recovery is not achieved. Currently, the management is still controversial and mainly through systemic steroid therapy or surgical decompression. However, current studies mainly focus on the surgical intervention, and only a few of these studies discuss the details of the steroid treatments. Thus, the purpose of this study is to analyze possible prognosis factors of systemic steroid in managing traumatic facial nerve palsy after a blunt craniofacial injury retrospectively...
May 31, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29803572/delayed-intraventricular-pneumocephalus-following-shunting-for-normal-pressure-hydrocephalus
#6
Alexander Verhaeghe, Stijn De Muynck, Jan W Casselman, Nikolaas Vantomme
BACKGROUND: Pneumocephalus is usually seen in trauma or cranial surgery. It is rarely reported as a delayed complication of ventriculoperitoneal (VP) shunt placement for hydrocephalus secondary to trauma, tumor or aqueduct stenosis. In this paper, we describe a case of intraventricular pneumocephalus (NPH) presenting 10 months after placement of a shunt for normal pressure hydrocephalus. CASE DESCRIPTION: Following the diagnosis of normal pressure hydrocephalus, a pressure-regulated VP shunt was implanted in an 81-year old patient...
May 24, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29799084/evaluation-of-a-new-slim-lateral-wall-electrode-for-cochlear-implantation-an-imaging-study-in-human-temporal-bones
#7
Aarno Dietz, Matti Iso-Mustajärvi, Sini Sipari, Jyrki Tervaniemi, Dzemal Gazibegovic
PURPOSE: To evaluate the insertion characteristics and trauma of a new slim lateral wall electrode (SlimJ) in human temporal bones (TB). METHODS: Pre- and postoperative assessment was performed using cone beam computed tomography (CBCT) and image fusion in 11 human TB. The position of the array in each cochlea was analyzed and described using a vertical scaling factor, calculated by dividing the distance of the scala tympani floor to the centre of the electrode by the duct height...
May 24, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29786819/evaluation-of-pterygoid-plate-fractures-unrelated-to-le-fort-fractures-using-maxillofacial-computed-tomography
#8
Serra Özbal Güneş, Yeliz Aktürk, Esra Soyer Güldoğan
BACKGROUND: This study aims to describe the major pterygoid plate fractures (PPFs) patterns unrelated to Le Fort fractures (LFFs) using maxillofacial computed tomography (CT). METHODS: After obtaining our hospital ethics committee approval (37-05), data for PPF were acquired from the medical records of all the trauma patients who were diagnosed using CT at our hospital from April 2014 to April 2017. RESULTS: Of the 178 patients, 135 (male/female = 86/49; mean age = 37...
May 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29771884/-exophthalmometry-with-computed-tomography
#9
M B Gushchina, D S Afanasyeva, S A Borzenok
Bone abnormalities of orbit seen in patients with trauma or radiolesion are accompanied by enophthalmos or exophthalmos. Conventional measurements of eyeball protrusion with Hertel's exophthalmometer or with computed tomography do not provide accurate and reliable data, especially in patients with asymmetry of lateral orbital rims. PURPOSE: To develop a method of computed exophthalmometry that provides accurate and reliable measurements in patients with various orbital conditions. MATERIAL AND METHODS: Medical records and computerized axial tomography scans of 25 patients' orbits without false enophthalmos or exophthalmos were analyzed posthoc...
2018: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29688804/are-patients-with-spontaneous-csf-otorrhea-and-superior-canal-dehiscence-congenitally-predisposed-to-their-disorders
#10
Shawn M Stevens, Kiefer Hock, Ravi N Samy, Myles L Pensak
Objectives (1) Compare lateral skull base (LSB) height/thickness in patients with spontaneous cerebrospinal fluid otorrhea (CSF), superior canal dehiscence (SCD), acoustic neuromas (AN), and otosclerosis (OTO). (2) Perform correlations between age, body mass index (BMI), sex, and LSB height/thickness. Study Design Case series with chart review. Setting Tertiary referral center. Subjects and Methods Patients with CSF, SCD, AN, and OTO diagnosed from 2006 to 2016 were included if they had high-definition temporal bone computed tomography (CT) and absence of trauma, radiation, chronic ear disease, and/or congenital anomaly...
April 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29608481/bilateral-post-traumatic-facial-paralysis-that-contains-longitudinal-and-transverse-temporal-fracture
#11
Caner Şahin, Özkan Özen
Acute bilateral post-traumatic facial paralysis is rare in the literature. Post-traumatic facial paralysis is frequently accompanied transverse fractures of temporal more. The incidence of acute bilateral post-traumatic facial paralysis has been reported as 1 to 5 per million in the literature. Trauma and concurrent facial paralysis are usually in the same subsite (right temporal bone fracture and right facial paralysis). There is one pathophysiological pattern for a single temporal bone fracture in a subsite...
March 30, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29493720/risk-of-posterior-semicircular-canal-trauma-when-using-a-retrosigmoid-approach-for-acoustic-neuroma-surgery-and-role-of-endoscopy-an-imaging-study
#12
Ali Kouhi, Varasteh Vakili Zarch, Ali Pouyan
The rate of hearing preservation after vestibular schwannoma surgery is variable and is not as high as expected, possibly due to injuries to the posterior semicircular canal while exposing the tumor. The aim of this study was to estimate the risk of posterior semicircular canal injuries using temporal bone computed tomography (CT) scan findings. Temporal bone CT scans of 30 patients selected between 2013 and 2015 were studied. The median age of the patients was 40 years. Two planes were studied: (1) the axial plane that shows the common crus of the posterior semicircular canal and (2) the coronal plane that shows the two crura of the posterior semicircular canal...
January 2018: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/29435765/inflammation-mesenchymal-stem-cells-and-bone-regeneration
#13
REVIEW
Hongrui Liu, Dongfang Li, Yi Zhang, Minqi Li
Achieving satisfactory reconstruction of bone remains an important goal in orthopedic and dental conditions such as bone trauma, osteoporosis, arthritis, osteonecrosis, and periodontitis. Appropriate temporal and spatial differentiation of mesenchymal stem cells (MSCs) is essential for postnatal bone regeneration. Additionally, an acute inflammatory response is crucial at the onset of bone repair, while an adaptive immune response has important implications during late bone remodeling. Various reports have indicated bidirectional interactions between MSCs and inflammatory cells or molecules...
April 2018: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29433408/blunt-injury-of-the-innominate-artery-what-surprises-to-expect-a-case-report
#14
Marina Dias-Neto, José F Ramos, José F Teixeira
Injuries of the supra-aortic trunk after blunt chest trauma are rare. This is a case report of a blunt traumatic lesion of the innominate artery (IA) origin that exhibited aortic arch involvement with a focus on imaging and treatment. A 41-year-old fisherman presented an IA injury secondary to a high-impact blunt chest trauma. Upon physical examination, vital signs were stable and upper extremity pulses were present. In addition to several bone fractures (costal ribs, clavicle, scapula, temporal, maxillary, and sphenoid), computed tomography angiography revealed dissection/pseudoaneurysm of the IA sparing the bifurcation...
April 2018: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29382611/novel-variant-in-sp7-osx-associated-with-recessive-osteogenesis-imperfecta-with-bone-fragility-and-hearing-impairment
#15
Melissa Fiscaletti, Andrew Biggin, Bruce Bennetts, Karen Wong, Julie Briody, Verity Pacey, Catherine Birman, Craig F Munns
Osteogenesis imperfecta (OI) is a connective tissue disorder characterized by low bone density and recurrent fractures with a wide genotypic and phenotypic spectrum. Common features include short stature, opalescent teeth, blue sclerae and hearing impairment. The majority (>90%) of patients with OI have autosomal dominant variants in COL1A1/COL1A2, which lead to defects in type 1 collagen. More recently, numerous recessive variants involving other genes have also been identified. Sp7/Osx gene, is a protein coding gene that encodes a zinc finger transcription factor, osterix, which is a member of the Sp subfamily of sequence-specific DNA-binding proteins...
May 2018: Bone
https://www.readbyqxmd.com/read/29342055/benefit-of-preoperative-temporal-bone-ct-for-atraumatic-cochlear-implantation
#16
Alexandre Karkas, Nicolas Menjot de Champfleur, Alain Uziel, Michel Mondain, Jean-Luc Puel, Frédéric Venail
HYPOTHESIS: Evaluate the benefit of preoperative surgical planning using computed tomography (CT) for atraumatic cochlear implantation. BACKGROUND: The surgical technique has a direct impact on hearing and structure preservation. Much interest has been given to depth of electrode insertion. We focused on electrode diameter depending on exposure of round window membrane (RWM) as calculated on preoperative CT. METHODS: Measurements were calculated radiologically and anatomically on 10 temporal bones...
March 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29342037/preservation-of-cells-of-the-organ-of-corti-and-innervating-dendritic-processes-following-cochlear-implantation-in-the-human-an-immunohistochemical-study
#17
Takefumi Kamakura, Jennifer T O'Malley, Joseph B Nadol
HYPOTHESIS: This study evaluates the degree of preservation of hair cells, supporting cells, and innervating dendritic processes after cochlear implantation in the human using immunohistochemical methods. BACKGROUND: Surgical insertion of a cochlear implant electrode induces various pathologic changes within the cochlea including insertional trauma, foreign body response, inflammation, fibrosis, and neo-osteogenesis. These changes may result in loss of residual acoustic hearing, adversely affecting the use of hybrid implants, and may result in loss of putative precursor cells, limiting the success of future regenerative protocols...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29316290/a-3d-bioprinted-in-situ-conjugated-co-fabricated-scaffold-for-potential-bone-tissue-engineering-applications
#18
Mduduzi N Sithole, Pradeep Kumar, Lisa C du Toit, Thashree Marimuthu, Yahya E Choonara, Viness Pillay
There is a demand for progressive approaches in bone tissue engineering to repair and regenerate bone defects resulting from trauma or disease. This investigation sought to engineer a single-step in situ conjugated polymeric scaffold employing 3D printing technology as an innovative fabricating tool. A polymeric scaffold was engineered in situ employing sodium alginate as a bio-ink which interacted with a poly(ethyleneimine) solution on bioprinting to form a polyelectrolyte complex through ionic bond formation...
May 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29315178/utilization-of-nerve-integrity-monitor-for-promontory-stimulation-testing-prior-to-cochlear-implant
#19
Elizabeth A Kelly, Samuel Levine, Kristin E Gravel, Dianna L Hart, Tina Huang
OBJECTIVE: To demonstrate the feasibility of a nerve integrity monitor as a tool for promontory stimulation testing in patients with profound sensorineural hearing loss considering cochlear implantation. PATIENTS: Adult patients considered for cochlear implantation with no auditory response on audiometric testing INTERVENTION:: Promontory stimulation testing using the nerve integrity monitor. MAIN OUTCOME MEASURE: By using a facial nerve stimulator and the nerve integrity monitor, transtympanic promontory stimulation testing was performed to assess auditory nerve function and determine candidacy for cochlear implantation...
February 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29291176/otorhinolaryngological-manifestations-in-head-trauma-a-prospective-study-of-the-epidemiology-clinical-presentations-management-and-outcomes
#20
Adeyi A Adoga, Kenneth N Ozoilo, Andrew A Iduh, Joyce G Mugu
Background: Otorhinolaryngological injuries following head trauma may be missed, overlooked, or forgotten in the acute phase resulting in worsened management outcomes. This study aims to report the epidemiology, clinical presentations, management, and outcomes of otorhinolaryngological injuries in head trauma with a view to creating awareness for early recognition and prompt treatment. Patients and Methods: Head injured patients consecutively presenting over a 5-year period were prospectively studied for age, gender, otorhinolaryngological presentations, interventions, and outcome of interventions...
October 2017: International Journal of Critical Illness and Injury Science
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