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https://www.readbyqxmd.com/read/29229134/animal-models-in-plastic-and-reconstructive-surgery-simulation-a-review
#1
REVIEW
Charles Yuen Yung Loh, Aline Yen Ling Wang, Vincent Tze Yang Tiong, Thanassi Athanassopoulos, Meiling Loh, Philip Lim, Huang-Kai Kao
BACKGROUND: The use of live and cadaveric animal models in surgical training is well established as a means of teaching and improving surgical skill in a controlled setting. We aim to review, evaluate, and summarize the models published in the literature that are applicable to Plastic Surgery training. MATERIALS AND METHODS: A PubMed search for keywords relating to animal models in Plastic Surgery and the associated procedures was conducted. Animal models that had cross over between specialties such as microsurgery with Neurosurgery and pinnaplasty with ear, nose, and throat surgery were included as they were deemed to be relevant to our training curriculum...
January 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29219894/crisis-management-simulation-establishing-a-dual-neurosurgery-and-anesthesia-training-experience
#2
Jeremy Ciporen, Haley Gillham, Michele Noles, Dawn Dillman, Mark Baskerville, Caleb Haley, Donn Spight, Ryan C Turner, Brandon P Lucke-Wold
BACKGROUND: Simulation training has been shown to be an effective teaching tool. Learner management of an intraoperative crisis such as a major cerebrovascular bleed requires effective teamwork, communication, and implementation of key skill sets at appropriate time points. This study establishes a first of a kind simulation experience in a neurosurgery/anesthesia resident (learners) team working together to manage an intraoperative crisis. METHODS: Using a cadaveric cavernous carotid injury perfusion model, 7 neurosurgery and 6 anesthesia learners, were trained on appropriate vascular injury management using an endonasal endoscopic technique...
January 2018: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/29198889/virtual-reality-based-simulators-for-cranial-tumor-surgery-a-systematic-review
#3
REVIEW
Travis Mazur, Tarek R Mansour, Luke Mugge, Azedine Medkour
BACKGROUND: Virtual reality (VR) simulators have become useful tools in various fields of medicine. Prominent uses of VR technologies include assessment of physician skills and for pre-surgical planning. VR has demonstrated effectiveness in multiple surgical specialties, yet its use in the field of neurosurgery remains limited to date. OBJECTIVES: To examine all current literature on VR based simulation for pre-surgical planning and training in cranial tumor surgeries and to assess the quality of these studies...
November 30, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29197347/sample-size-calculations-based-on-a-difference-in-medians-for-positively-skewed-outcomes-in-health-care-studies
#4
Aidan G O'Keeffe, Gareth Ambler, Julie A Barber
BACKGROUND: In healthcare research, outcomes with skewed probability distributions are common. Sample size calculations for such outcomes are typically based on estimates on a transformed scale (e.g. log) which may sometimes be difficult to obtain. In contrast, estimates of median and variance on the untransformed scale are generally easier to pre-specify. The aim of this paper is to describe how to calculate a sample size for a two group comparison of interest based on median and untransformed variance estimates for log-normal outcome data...
December 2, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/29119039/osirix-software-as-a-preoperative-planning-tool-in-cranial-neurosurgery-a-step-by-step-guide-for-neurosurgical-residents
#5
REVIEW
Toma Spiriev, Vladimir Nakov, Lili Laleva, Christo Tzekov
Background: OsiriX (Pixmeo, Switzerland) is an open-source Digital Imaging and Communications in Medicine (DICOM) viewer that is gaining more and more attention in the neurosurgical community because of its user-friendly interface, powerful three-dimensional (3D) volumetric rendering capabilities, and various options for data integration. This paper presents in detail the use of OsiriX software as a preoperative planning tool in cranial neurosurgery. Methods: In January 2013, OsiriX software was introduced into our clinical practice as a preoperative planning tool...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29106668/usim-a-new-device-and-app-for-case-specific-intraoperative-ultrasound-simulation-and-rehearsal-in-neurosurgery-a-preliminary-study
#6
Alessandro Perin, Francesco Ugo Prada, Michela Moraldo, Andrea Schiappacasse, Tommaso Francesco Galbiati, Enrico Gambatesa, Piergiorgio d'Orio, Nicole Irene Riker, Curzio Basso, Matteo Santoro, Torstein Ragnar Meling, Karl Schaller, Francesco DiMeco
BACKGROUND: Intraoperative ultrasound (iUS) is an excellent aid for neurosurgeons to perform better and safer operations thanks to real time, continuous, and high-quality intraoperative visualization. OBJECTIVE: To develop an innovative training method to teach how to perform iUS in neurosurgery. METHODS: Patients undergoing surgery for different brain or spine lesions were iUS scanned (before opening the dura) in order to arrange a collection of 3-dimensional, US images; this set of data was matched and paired to preoperatively acquired magnetic resonance images in order to create a library of neurosurgical cases to be studied offline for training and rehearsal purposes...
June 29, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29029228/development-of-a-whole-task-simulator-for-carotid-endarterectomy
#7
Gabrielle Santangelo, Doran Mix, Ahmed Ghazi, Michael Stoner, G Edward Vates, Jonathan J Stone
BACKGROUND: Surgical education relies on operative exposure with live patients. Carotid endarterectomy (CEA) demands an experienced surgeon with a very low complication rate. The high-risk nature of this procedure and the decline in number of CEAs performed annually has created a gap in residency training. OBJECTIVE: To develop a high-fidelity whole-task simulation for CEA that demonstrates content, construct, and face validity. METHODS: Anatomically accurate models of the human neck were created using multilayered poly-vinyl alcohol hydrogels...
September 27, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28985669/establishment-of-next-generation-neurosurgery-research-and-training-laboratory-with-integrated-human-performance-monitoring
#8
Antonio Bernardo
Quality of neurosurgical care and patient outcomes are inextricably linked to surgical and technical proficiency and a thorough working knowledge of microsurgical anatomy. Neurosurgical laboratory-based cadaveric training is essential for the development and refinement of technical skills before their use on a living patient. Recent biotechnological advances including 3-dimensional (3D) microscopy and endoscopy, 3D printing, virtual reality, surgical simulation, surgical robotics, and advanced neuroimaging have proved to reduce the learning curve, improve conceptual understanding of complex anatomy, and enhance visuospatial skills in neurosurgical training...
October 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28942677/a-novel-device-for-intraoperative-photodynamic-therapy-dedicated-to-glioblastoma-treatment
#9
Clément Dupont, Serge Mordon, Pascal Deleporte, Nicolas Reyns, Maximilien Vermandel
AIM: Photodynamic therapy (PDT) appears to be a valuable new treatment modality for cancer therapy. Studies have reported successful application of PDT for glioblastoma. Here, we introduce a new device dedicated to intraoperative PDT delivered early after fluoro-guided resection combined with a transfer function that determines the treatment time based on the size of the surgical resection cavity. MATERIALS & METHODS: First, we describe the device, which is composed of a trocar, a balloon filled with a diffusing solution, and a fiber guide in which a cylindrical light diffuser is inserted...
September 25, 2017: Future Oncology
https://www.readbyqxmd.com/read/28924572/stereovision-based-integrated-system-for-point-cloud-reconstruction-and-simulated-brain-shift-validation
#10
Xiaochen Yang, Logan W Clements, Ma Luo, Saramati Narasimhan, Reid C Thompson, Benoit M Dawant, Michael I Miga
Intraoperative soft tissue deformation, referred to as brain shift, compromises the application of current image-guided surgery navigation systems in neurosurgery. A computational model driven by sparse data has been proposed as a cost-effective method to compensate for cortical surface and volumetric displacements. We present a mock environment developed to acquire stereoimages from a tracked operating microscope and to reconstruct three-dimensional point clouds from these images. A reconstruction error of 1 mm is estimated by using a phantom with a known geometry and independently measured deformation extent...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28864400/effects-of-transcranial-direct-current-stimulation-on-neurosurgical-skill-acquisition-a-randomized-controlled-trial
#11
Patrick Ciechanski, Adam Cheng, Steven Lopushinsky, Kent Hecker, Liu Shi Gan, Stefan Lang, Kourosh Zareinia, Adam Kirton
BACKGROUND: Recent changes in surgical training environments may have limited opportunities for trainees to gain proficiency in skill. Complex skills such as neurosurgery required extended periods of training. Methods to enhance surgical training are required to overcome duty-hour restrictions, to ensure skill proficiency is met. Transcranial direct-current stimulation (tDCS) can enhance motor skill learning but is untested in surgical procedural training. We aimed to determine the effects of tDCS on simulation-based neurosurgical skill acquisition...
August 29, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28842674/hyperspectral-data-processing-improves-ppix-contrast-during-fluorescence-guided-surgery-of-human-brain-tumors
#12
J J Bravo, J D Olson, S C Davis, D W Roberts, K D Paulsen, S C Kanick
Fluorescence guided surgery (FGS) using aminolevulinic-acid (ALA) induced protoporphyrin IX (PpIX) provides intraoperative visual contrast between normal and malignant tissue during resection of high grade gliomas. However, maps of the PpIX biodistribution within the surgical field based on either visual perception or the raw fluorescence emissions can be masked by background signals or distorted by variations in tissue optical properties. This study evaluates the impact of algorithmic processing of hyperspectral imaging acquisitions on the sensitivity and contrast of PpIX maps...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811078/mentoring-models-in-neurosurgical-training-review-of-literature
#13
REVIEW
Taiwo Akhigbe, Ardalan Zolnourian, Diederik Bulters
BACKGROUND: Effective mentoring is an invaluable element in the development of next generation of neurosurgeons. A mentor helps to develop professional core values, technical and non-technical skills, attitudes and disposition required to be qualified and competent neurosurgeon. Giving the invaluable significance of mentoring in neurosurgery, we undertook this literature review to identify mentoring models evaluating its success and relative benefit. METHODS: Literature search identified using MeSH word 'mentor', mentoring, mentorship, mentoring model, neurosurgery' in MEDLINE, EMBASE and Scopus databases from 1990 to 2016...
November 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28774433/a-high-resolution-model-for-soft-tissue-deformation-based-on-point-primitives
#14
Yanni Zou, Peter X Liu
BACKGROUND AND OBJECTIVES: In order to achieve a high degree of visual realism in surgery simulation, we propose a new model, which is based on point primitives and continuous elastic mechanics theory, for soft tissue deformation, tearing and/or cutting. METHODS: The model can be described as a two-step local high-resolution strategy. First, appropriate volumetric data are sampled and assigned with proper physical properties. Second, sparsely sampled points in non-deformed regions and densely-sampled points in the deformed zone are selected and evaluated...
September 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28765716/simulation-training-in-neurosurgery-advances-in-education-and-practice
#15
REVIEW
Sanjay Konakondla, Reginald Fong, Clemens M Schirmer
The current simulation technology used for neurosurgical training leaves much to be desired. Significant efforts are thoroughly exhausted in hopes of developing simulations that translate to give learners the "real-life" feel. Though a respectable goal, this may not be necessary as the application for simulation in neurosurgical training may be most useful in early learners. The ultimate uniformly agreeable endpoint of improved outcome and patient safety drives these investments. We explore the development, availability, educational taskforces, cost burdens and the simulation advancements in neurosurgical training...
2017: Advances in Medical Education and Practice
https://www.readbyqxmd.com/read/28756040/viscoelastic-parameter-identification-of-human-brain-tissue
#16
S Budday, G Sommer, G A Holzapfel, P Steinmann, E Kuhl
Understanding the constitutive behavior of the human brain is critical to interpret the physical environment during neurodevelopment, neurosurgery, and neurodegeneration. A wide variety of constitutive models has been proposed to characterize the brain at different temporal and spatial scales. Yet, their model parameters are typically calibrated with a single loading mode and fail to predict the behavior under arbitrary loading conditions. Here we used a finite viscoelastic Ogden model with six material parameters-an elastic stiffness, two viscoelastic stiffnesses, a nonlinearity parameter, and two viscous time constants-to model the characteristic nonlinearity, conditioning, hysteresis and tension-compression asymmetry of the human brain...
October 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28754068/a-new-head-mounted-display-based-augmented-reality-system-in-neurosurgical-oncology-a-study-on-phantom
#17
Fabrizio Cutolo, Antonio Meola, Marina Carbone, Sara Sinceri, Federico Cagnazzo, Ennio Denaro, Nicola Esposito, Mauro Ferrari, Vincenzo Ferrari
PURPOSE: Benefits of minimally invasive neurosurgery mandate the development of ergonomic paradigms for neuronavigation. Augmented Reality (AR) systems can overcome the shortcomings of commercial neuronavigators. The aim of this work is to apply a novel AR system, based on a head-mounted stereoscopic video see-through display, as an aid in complex neurological lesion targeting. Effectiveness was investigated on a newly designed patient-specific head mannequin featuring an anatomically realistic brain phantom with embedded synthetically created tumors and eloquent areas...
December 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/28750949/a-machine-learning-approach-for-real-time-modelling-of-tissue-deformation-in-image-guided-neurosurgery
#18
Michele Tonutti, Gauthier Gras, Guang-Zhong Yang
OBJECTIVES: Accurate reconstruction and visualisation of soft tissue deformation in real time is crucial in image-guided surgery, particularly in augmented reality (AR) applications. Current deformation models are characterised by a trade-off between accuracy and computational speed. We propose an approach to derive a patient-specific deformation model for brain pathologies by combining the results of pre-computed finite element method (FEM) simulations with machine learning algorithms...
July 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28721533/minimum-norm-estimation-of-motor-representations-in-navigated-tms-mappings
#19
Minna Pitkänen, Elisa Kallioniemi, Petro Julkunen, Maria Nazarova, Jaakko O Nieminen, Risto J Ilmoniemi
Navigated transcranial magnetic stimulation (nTMS) can be applied to locate and outline cortical motor representations. This may be important, e.g., when planning neurosurgery or focused nTMS therapy, or when assessing plastic changes during neurorehabilitation. Conventionally, a cortical location is considered to belong to the motor cortex if the maximum electric field (E-field) targeted there evokes a motor-evoked potential in a muscle. However, the cortex is affected by a broad E-field distribution, which tends to broaden estimates of representation areas by stimulating also the neighboring areas in addition to the maximum E-field location...
July 18, 2017: Brain Topography
https://www.readbyqxmd.com/read/28666846/-3d-printing-in-neurosurgery-a-specific-model-for-patients-with-craniosynostosis
#20
Borja Jiménez Ormabera, Ricardo Díez Valle, Javier Zaratiegui Fernández, Marcos Llorente Ortega, Xabier Unamuno Iñurritegui, Sonia Tejada Solís
INTRODUCTION: Craniosynostosis is a rare condition and requires a personalised surgical approach, which is why we consider the use of 3D printed models beneficial in the surgical planning of this procedure. MATERIAL AND METHODS: Acrylonitrile butadiene styrene plastic skull models were designed and printed from CT images of patients between 3 and 6 months of age with craniosynostosis of different sutures. The models were used to simulate surgical procedures. RESULTS: Four models of four patients with craniosynostosis were produced: two with closure of the metopic suture and two with sagittal suture closure...
November 2017: Neurocirugía
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