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cranial base surgery

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https://www.readbyqxmd.com/read/28528370/systematic-radiographic-evaluation-of-three-potential-implantation-sites-for-a-semi-implantable-bone-conduction-device-in-52-patients-after-previous-mastoid-surgery
#1
Bernhard G Weiss, Mattis Bertlich, Rebecka Scheele, Martin Canis, Mark Jakob, Jan M Sohns, Friedrich Ihler
The aim of this study was the evaluation of three localizations for the implantation of a semi-implantable transcutaneous bone conduction device after previous mastoid surgery. This is a retrospective review of electronic datasets of cranial computed tomography studies. The study setting is one tertiary referral center and included 52 consecutive adult patients (60 temporal bones) with a history of mastoid surgery. The intervention was virtual placement of the device with a planning software within the remaining mastoid as well as dorsal of the sigmoid sinus and caudal of the transverse sinus (retrosigmoidal localization) and dorsocranial of the parietomastoid suture and cranial of the transverse sinus (parietal localization)...
May 20, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28527929/new-predictors-of-complications-in-carotid-body-tumor-resection
#2
Gloria Y Kim, Peter F Lawrence, Rameen S Moridzadeh, Kate Zimmerman, Alberto Munoz, Kuauhyama Luna-Ortiz, Gustavo S Oderich, Juan de Francisco, Jorge Ospina, Santiago Huertas, Leonardo R de Souza, Thomas C Bower, Steven Farley, Hugh A Gelabert, Marcus R Kret, E John Harris, Giovanni De Caridi, Francesco Spinelli, Matthew R Smeds, Christos D Liapis, John Kakisis, Anastasios P Papapetrou, Eike S Debus, Christian-A Behrendt, Edgar Kleinspehn, Joshua D Horton, Firas F Mussa, Stephen W K Cheng, Mark D Morasch, Khurram Rasheed, Matthew E Bennett, Jean Bismuth, Alan B Lumsden, Christopher J Abularrage, Alik Farber
OBJECTIVE: This study examined the relationship between two new variables, tumor distance to base of skull (DTBOS) and tumor volume, with complications of carotid body tumor (CBT) resection, including bleeding and cranial nerve injury. METHODS: Patients who underwent CBT resection between 2004 and 2014 were studied using a standardized, multi-institutional database. Demographic, perioperative, and outcomes data were collected. CBT measurements were determined from computed tomography, magnetic resonance imaging, and ultrasound examination...
June 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28512008/3d-printing-and-modelling-of-customized-implants-and-surgical-guides-for-non-human-primates
#3
Xing Chen, Jessy K Possel, Catherine Wacongne, Anne F van Ham, P Christiaan Klink, Pieter R Roelfsema
BACKGROUND: Primate neurobiologists use chronically implanted devices such as pedestals for head stabilization and chambers to gain access to the brain and study its activity. Such implants are skull-mounted, and made from a hard, durable material, such as titanium. NEW METHOD: Here we present a low-cost method of creating customized 3D-printed cranial implants that are tailored to the anatomy of individual animals. We performed pre-surgical computed tomography (CT) and magnetic resonance (MR) scans to generate three-dimensional (3D) models of the skull and brain...
May 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28511365/morphological-and-morphometric-analysis-of-hypoglossal-canal-in-north-indian-dry-skulls-and-it-s-significance-in-cranial-base-surgeries
#4
Shalini Kumar, Ranjana Verma, Arpita Mahajan Rai, Raj D Mehra
INTRODUCTION: Hypoglossal Canal (HC) is a paired bony passage which is situated above the Occipital Condyle (OC) and transmits hypoglossal nerve and blood vessels. Studies on the osteotic variations of HC has been a field of considerable interest to research workers especially because of its clinical, radiological and surgical significance. AIM: The aim of the present study was to analyze the morphological and morphometric features of HC and its topographical relationship with OC...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28504985/current-opinion-in-otolaryngology-and-head-and-neck-surgery-frontal-sinus-fractures
#5
Robert J Chouake, Brett A Miles
PURPOSE OF REVIEW: The purpose of this manuscript is to review the current literature regarding the management of frontal sinus fractures and offer the authors opinion on the current management of these traumatic injuries. We evaluate recently proposed management algorithms as well as novel surgical approaches reported within the last few years. RECENT FINDINGS: Patient selection for sinus sparing treatment modalities is balanced between fracture severity, involved structures, and reliable patient surveillance...
May 12, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28504187/transoral-oropharyngeal-resection-classification-proposal-of-the-scorl-working-group
#6
David Virós Porcuna, Francisco Avilés Jurado, Carlos Pollán Guisasola, Rosa Delia Ramírez Ruiz, Jacinto García Lorenzo, Marc Tobed Secall, Isabel Vilaseca González, José Miguel Costa González, Josep Soteras Olle, Francesc Casamitjana Claramunt, Anna Sumarroca Trouboul, Rafael Hijano Esqué, Guillem Viscasillas Pallàs, Manel Mañós Pujol, Miquel Quer Agustí
INTRODUCTION AND GOALS: There has been a very significant increase in the use of minimally invasive surgery has in the last decade. In order to provide a common language after transoral surgery of the oropharynx, a system for classifying resections has been created in this area, regardless of the instrumentation used. METHODS: From the Oncology Working Group of the Catalan Society of Otorhinolaryngology, a proposal for classification based on a topographical division of the different areas of the oropharynx is presented, as also based on the invasion of the related structures according to the anatomical routes of extension of these tumours...
May 11, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28483229/use-of-three-dimensional-cad-cam-assisted-virtual-surgical-simulation-and-planning-in-the-pediatric-craniofacial-population
#7
Rachel Gray, Alexander Gougoutas, Vinh Nguyen, Jesse Taylor, Nicholas Bastidas
OBJECTIVE: Virtual Surgical Planning (VSP) and computer-aided design/computer-aided manufacturing (CAD/CAM) have recently helped improve efficiency and accuracy in many different craniofacial surgeries. Research has mainly focused on the use in the adult population with the exception of the use for mandibular distractions and cranial vault remodeling in the pediatric population. This study aims to elucidate the role of VSP and CAD/CAM in complex pediatric craniofacial cases by exploring its use in the correction of midface hypoplasia, orbital dystopia, mandibular reconstruction, and posterior cranial vault expansion...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28474186/sphenoorbital-meningioma-surgical-series-and-design-of-an-intraoperative-management-algorithm
#8
Lior Gonen, Eytan Nov, Nir Shimony, Ben Shofty, Nevo Margalit
Current surgical removal of sphenoorbital meningiomas (SOM) mainly aims at reduction of proptosis and restoration of visual function; some stages of the surgical technique are controversial. In this study, we aim to present a surgical decision-making algorithm for SOM. A retrospective study of 27 patients who underwent resection of SOM in our center (2005-2014) was conducted. The primary outcomes evaluated were postoperative visual function and radiological exophthalmos. In our study, clinical proptosis was the most common presenting sign (92%), followed by visual loss (37%)...
May 4, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28474182/homogenous-scaffold-based-cranial-skull-implant-modelling-and-structural-analysis-unit-cell-algorithm-meshless-approach
#9
V Phanindra Bogu, Y Ravi Kumar, Asit Kumar Khanra
This computational study explores a unique modelling approach of the cranial implant, homogenous scaffold algorithm and meshless method, respectively. This meshless method is employed to review the implant underneath intracranial pressure (ICP) conditions with a standard ICP range of 7 mm of Hg to 15 mm of Hg. The algorithm is used to introduce uniform porosity within the implant enabling the implant behaviour with respect to ICP conditions. However, increase in the porosity leads to variation in deformation and equivalent stress, respectively...
May 5, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28472679/a-fiducial-skull-marker-for-precise-mri-based-stereotaxic-surgery-in-large-animal-models
#10
Andreas Nørgaard Glud, Johannes Bech, Laura Tvilling, Hamed Zaer, Dariusz Orlowski, Lise Moberg Fitting, Dora Ziedler, Michael Geneser, Ryan Sangill, Aage Kristian Olsen Alstrup, Carsten Reidies Bjarkam, Jens Christian Hedemann Sørensen
BACKGROUND: Stereotaxic neurosurgery in large animals is used widely in different sophisticated models, where precision is becoming more crucial as desired anatomical target regions are becoming smaller. Individually calculated coordinates are necessary in large animal models with cortical and subcortical anatomical differences. NEW METHOD: We present a convenient method to make an MRI-visible skull fiducial for 3D MRI-based stereotaxic procedures in larger experimental animals...
May 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28463622/initial-experience-with-a-robotically-operated-video-optical-telescopic-microscope-in-cranial-neurosurgery-feasibility-safety-and-clinical-applications
#11
Lior Gonen, Srikant S Chakravarthi, Alejandro Monroy-Sosa, Juanita M Celix, Nathaniel Kojis, Maharaj Singh, Jonathan Jennings, Melanie B Fukui, Richard A Rovin, Amin B Kassam
OBJECTIVE The move toward better, more effective optical visualization in the field of neurosurgery has been a focus of technological innovation. In this study, the authors' objectives are to describe the feasibility and safety of a new robotic optical platform, namely, the robotically operated video optical telescopic-microscope (ROVOT-m), in cranial microsurgical applications. METHODS A prospective database comprising patients who underwent a cranial procedure between April 2015 and September 2016 was queried, and the first 200 patients who met the inclusion criteria were selected as the cohort for a retrospective chart review...
May 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28460422/effect-of-stem-sizing-and-position-on-short-term-complications-with-canine-press-fit-cementless-total-hip-arthroplasty
#12
Sarah Townsend, Stanley E Kim, Antonio Pozzi
OBJECTIVE: To determine the influence of stem sizing and positioning with early subsidence and stem complications with cementless (BFX) total hip arthroplasty (THA). STUDY DESIGN: Retrospective case series. ANIMALS: Fifty-five dogs; 58 THAs. METHODS: Eighty cobalt-chromium BFX THAs were reviewed, 58 met inclusion criteria. Implant size, positioning, and major complications within 12 months of surgery were recorded. Femoral canal flare (FCF), canal fill, stem angle, and subsidence at 3 months were measured from postoperative radiographs...
April 29, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28452617/intradiploic-encephalocele-of-the-primary-motor-cortex-in-an-adult-patient-electrophysiological-implications-during-surgery
#13
Luca Valci, Martina Dalolio, Dominique Kuhlen, Emanuele Pravatà, Claudio Gobbi, Michael Reinert
Encephaloceles are herniations of brain parenchyma through congenital or acquired osseous-dural defects of the skull base or cranial vault. Different types of symptoms, due to CSF fistulas, meningitis, or seizures, are often associated with this condition. The authors present a rare case of spontaneous right frontal parasagittal encephalocele in a 70-year-old man who was experiencing a spastic progressive paresis of his left lower limb. Results of routine electrophysiological workup (motor evoked potentials, somatosensory evoked potentials, and electroneuromyography), as well as those of MRI of the spinal cord, were normal...
April 28, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28448921/novel-bone-surrogates-for-cranial-surgery-training
#14
Marianne Hollensteiner, David Fürst, Benjamin Esterer, Peter Augat, Falk Schrödl, Stefan Hunger, Michael Malek, Daniel Stephan, Andreas Schrempf
Parietal graft lifts are trained on human or animal specimens or are directly performed on patients without extensive training. In order to prevent harm to the patient resulting from fast rotating machinery tools, the surgeon needs to apply appropriate forces. Realistic haptics are essential to identify the varying parietal bone layers and to avoid a penetration of the brain. This however, requires experience and training. Therefore, in this study, bone surrogate materials were evaluated with the aim to provide an anatomically correct artificial skull cap with realistic haptic feedback for graft lift training procedures...
April 19, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28439721/incidence-of-thromboembolic-events-after-use-of-gelatin-thrombin-based-hemostatic-matrix-during-intracranial-tumor-surgery
#15
Roberto Gazzeri, Marcelo Galarza, Carlo Conti, Costanzo De Bonis
Association between the use of hemostatic agents made from collagen/gelatin mixed with thrombin and thromboembolic events in patients undergoing tumor resection has been suggested. This study evaluates the relationship between flowable hemostatic matrix and deep vein thrombosis in a large cohort of patients treated for brain tumor removal. The authors conducted a retrospective, multicenter, clinical review of all craniotomies for tumor removal performed between 2013 and 2014. Patients were classified in three groups: group I (flowable gelatin hemostatic matrix with thrombin), group II (gelatin hemostatic without thrombin), and group III (classical hemostatic)...
April 24, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28433845/clinical-outcome-after-extended-endoscopic-endonasal-resection-of-craniopharyngiomas-two-institution-experience
#16
Hye Ran Park, Varun R Kshettry, Christopher J Farrell, Jae Meen Lee, Yong Hwy Kim, Tae Bin Won, Doo Hee Han, Hyunwoo Do, Gurston Nyguist, Marc Rosen, Dong Gyu Kim, James J Evans, Sun Ha Paek
BACKGROUND: The extended endoscopic endonasal approach (EEA) to the anterior cranial base is used for the resection of craniopharyngiomas. OBJECTIVE: We present clinical experience and outcomes utilizing EEA for craniopharyngiomas. METHODS: A total of 116 patients in two remote institutions were enrolled in this retrospective study. Surgical, endocrinological and ophthalmological outcomes were assessed. RESULTS: The mean follow-up was 35 months (range, 1-115)...
April 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28429473/surgery-for-limited-stage-small-cell-lung-cancer
#17
REVIEW
Hayley Barnes, Katharine See, Stephen Barnett, Renée Manser
BACKGROUND: Current treatment guidelines for limited-stage small-cell lung cancer (SCLC) recommend concomitant platinum-based chemo-radiotherapy plus prophylactic cranial irradiation, based on the premise that SCLC disseminates early, and is chemosensitive. However, although there is usually a favourable initial response, relapse is common and the cure rate for limited-stage SCLC remains relatively poor. Some recent clinical practice guidelines have recommended surgery for stage 1 (limited) SCLC followed by adjuvant chemotherapy, but this recommendation is largely based on the findings of observational studies...
April 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28427835/maxillofacial-growth-and-speech-outcome-after-one-stage-or-two-stage-palatoplasty-in-unilateral-cleft-lip-and-palate-a-systematic-review
#18
Rajgopal R Reddy, Srinivas Gosla Reddy, Anitha Vaidhyanathan, Stefaan J Bergé, Anne Marie Kuijpers-Jagtman
BACKGROUND: The number of surgical procedures to repair a cleft palate may play a role in the outcome for maxillofacial growth and speech. The aim of this systematic review was to investigate the relationship between the number of surgical procedures performed to repair the cleft palate and maxillofacial growth, speech and fistula formation in non-syndromic patients with unilateral cleft lip and palate. MATERIAL AND METHODS: An electronic search was performed in PubMed/old MEDLINE, the Cochrane Library, EMBASE, Scopus and CINAHL databases for publications between 1960 and December 2015...
March 22, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28409727/clival-chordomas-considerations-after-16-years-of-endoscopic-endonasal-surgery
#19
Matteo Zoli, Laura Milanese, Rocco Bonfatti, Marco Faustini-Fustini, Gianluca Marucci, Giovanni Tallini, Corrado Zenesini, Carmelo Sturiale, Giorgio Frank, Ernesto Pasquini, Diego Mazzatenta
OBJECTIVE In the past decade, the role of the endoscopic endonasal approach (EEA) has relevantly evolved for skull base tumors. In this study, the authors review their surgical experience with using an EEA in the treatment of clival chordomas, which are deep and infiltrative skull base lesions, and they highlight the advantages and limitations of this ventral approach. METHODS All consecutive cases of chordoma treated with an EEA between 1998 and 2015 at a single institution are included in this study. Preoperative assessment consisted of neuroimaging (MRI and CT with angiography sequences) and endocrinological, neurological, and ophthalmological evaluations, which were repeated 3 months after surgery and annually thereafter...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28391532/outcome-of-a-graduated-minimally-invasive-facial-reanimation-in-patients-with-facial-paralysis
#20
Laura C Holtmann, Anja Eckstein, Kerstin Stähr, Minzhi Xing, Stephan Lang, Stefan Mattheis
Peripheral paralysis of the facial nerve is the most frequent of all cranial nerve disorders. Despite advances in facial surgery, the functional and aesthetic reconstruction of a paralyzed face remains a challenge. Graduated minimally invasive facial reanimation is based on a modular principle. According to the patients' needs, precondition, and expectations, the following modules can be performed: temporalis muscle transposition and facelift, nasal valve suspension, endoscopic brow lift, and eyelid reconstruction...
April 8, 2017: European Archives of Oto-rhino-laryngology
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