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https://www.readbyqxmd.com/read/28323840/htc-vive-mevislab-integration-via-openvr-for-medical-applications
#1
Jan Egger, Markus Gall, Jürgen Wallner, Pedro Boechat, Alexander Hann, Xing Li, Xiaojun Chen, Dieter Schmalstieg
Virtual Reality, an immersive technology that replicates an environment via computer-simulated reality, gets a lot of attention in the entertainment industry. However, VR has also great potential in other areas, like the medical domain, Examples are intervention planning, training and simulation. This is especially of use in medical operations, where an aesthetic outcome is important, like for facial surgeries. Alas, importing medical data into Virtual Reality devices is not necessarily trivial, in particular, when a direct connection to a proprietary application is desired...
2017: PloS One
https://www.readbyqxmd.com/read/28318742/a-mobile-based-surgical-simulation-application-a-comparative-analysis-of-efficacy-using-a-carpal-tunnel-release%C3%A2-module
#2
Kamil M Amer, Taha Mur, Kamal Amer, Asif M Ilyas
PURPOSE: The utilization of surgical simulation continues to grow in medical training. The TouchSurgery application (app) is a new interactive virtual reality smartphone- or tablet-based app that offers a step-by-step tutorial and simulation for the execution of various operations. The purpose of this study was to compare the efficacy of the app versus traditional teaching modalities utilizing the "Carpal Tunnel Surgery" module. We hypothesized that users of the app would score higher than those using the traditional education medium indicating higher understanding of the steps of surgery...
March 16, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28317683/new-technique-for-femtosecond-laser-creation-of-clear-corneal-incisions-for-cataract-surgery
#3
Sebastiano Serrao, Daniela Giannini, Domenico Schiano-Lomoriello, Giuseppe Lombardo, Marco Lombardo
PURPOSE: To evaluate the changes in corneal topography and corneal higher-order wavefront aberrations with the use of a new technique in which clear corneal incisions (CCIs) for cataract surgery are created with a femtosecond laser. SETTING: IRCCS Fondazione G.B. Bietti, Rome, Italy. DESIGN: Prospective randomized case series. METHODS: Cataract surgery patients were randomized into 2 groups. In the study group, a 3-plane CCI was created with a femtosecond laser...
January 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28314588/risk-of-breast-cancer-after-a-diagnosis-of-ovarian-cancer-in-brca-mutation-carriers-is-preventive-mastectomy-warranted
#4
Jacob McGee, Vasily Giannakeas, Beth Karlan, Jan Lubinski, Jacek Gronwald, Barry Rosen, John McLaughlin, Harvey Risch, Ping Sun, William D Foulkes, Susan L Neuhausen, Joanne Kotsopoulos, Steven A Narod
OBJECTIVE: Preventive breast surgery and MRI screening are offered to unaffected BRCA mutation carriers. The clinical benefit of these two modalities has not been evaluated among mutation carriers with a history of ovarian cancer. Thus, we sought to determine whether or not BRCA mutation carriers with ovarian cancer would benefit from preventive mastectomy or from MRI screening. METHODS: First, the annual mortality rate for ovarian cancer patients was estimated for a cohort of 178 BRCA mutation carriers from Ontario, Canada...
March 14, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28302385/primary-cutaneous-interdigitating-dendritic-cell-sarcoma-is-a-morphologic-and-phenotypic-simulator-of-poorly-differentiated-metastatic-melanoma-a-report-of-2-cases-and-review-of-the-literature
#5
REVIEW
Cynthia M Magro, Luke C Olson, Gerard Nuovo, Garron J Solomon
Interdigitating dendritic cell sarcoma (IDS) is a rare form of hematologic malignancy associated with an aggressive clinical course. Only 4 prior cases have been described as originating in the skin. We encountered two male patients ages 47 and 61years of age who presented with solitary cutaneous neoplasms diagnosed as IDS. Histologic exam showed a coalescing nested and multinodular proliferation of large pleomorphic epithelioid cells. In one case an initial diagnosis of melanoma was rendered. A recurrence 8months later was then interpreted as a primary cutaneous IDS...
February 20, 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28297050/preoperative-computer-simulation-for-planning-of-vascular-access-surgery-in-hemodialysis-patients
#6
Niek Zonnebeld, Wouter Huberts, Magda M van Loon, Tammo Delhaas, Jan H M Tordoir
INTRODUCTION: The arteriovenous fistula (AVF) is the preferred vascular access for hemodialysis patients. Unfortunately, 20-40% of all constructed AVFs fail to mature (FTM), and are therefore not usable for hemodialysis. AVF maturation importantly depends on postoperative blood volume flow. Predicting patient-specific immediate postoperative flow could therefore support surgical planning. A computational model predicting blood volume flow is available, but the effect of blood flow predictions on the clinical endpoint of maturation (at least 500 mL/min blood volume flow, diameter of the venous cannulation segment ≥4 mm) remains undetermined...
March 6, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28295456/firth-s-logistic-regression-with-rare-events-accurate-effect-estimates-and-predictions
#7
Rainer Puhr, Georg Heinze, Mariana Nold, Lara Lusa, Angelika Geroldinger
Firth's logistic regression has become a standard approach for the analysis of binary outcomes with small samples. Whereas it reduces the bias in maximum likelihood estimates of coefficients, bias towards one-half is introduced in the predicted probabilities. The stronger the imbalance of the outcome, the more severe is the bias in the predicted probabilities. We propose two simple modifications of Firth's logistic regression resulting in unbiased predicted probabilities. The first corrects the predicted probabilities by a post hoc adjustment of the intercept...
March 12, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28294695/operating-room-team-training-with-simulation-a-systematic-review
#8
Jamie M Robertson, Roger D Dias, Steven Yule, Douglas S Smink
INTRODUCTION: Nontechnical skills (NTS) such as teamwork and communication play an important role in preventing adverse outcomes in the operating room (OR). Simulation-based OR team training focused on these skills provides an environment where team members can learn with and from one another. We sought to conduct a systematic review to identify simulation-based approaches to NTS training for surgical teams. MATERIALS AND METHODS: We conducted a systematic search of PubMed, ERIC, and the Cochrane Database using keywords and MeSH terms for studies describing simulation-based training for OR teams, including members from surgery, anesthesia, and nursing in September 2016...
March 15, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28292706/effect-of-airflow-and-material-models-on-tissue-displacement-for-surgical-planning-of-pharyngeal-airways-in-pediatric-down-syndrome-patients
#9
Dhananjay Radhakrishnan Subramaniam, Goutham Mylavarapu, Robert J Fleck, Raouf S Amin, Sally R Shott, Ephraim J Gutmark
Pharyngeal narrowing in obstructive sleep apnea (OSA) results from flow-induced displacement of soft tissue. The objective of this study is to evaluate the effect of airflow parameters and material model on soft tissue displacement for planning surgical treatment in pediatric patients with OSA and Down syndrome (DS). Anatomically accurate, three-dimensional geometries of the pharynx and supporting tissue were reconstructed for one pediatric OSA patient with DS using magnetic resonance images. Six millimeters of adenoid tissue was virtually removed based on recommendations from the surgeon, to replicate the actual adenoidectomy...
March 8, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28292655/a-one-dimensional-arterial-network-model-for-bypass-graft-assessment
#10
A R Ghigo, S Abou Taam, X Wang, P-Y Lagrée, J-M Fullana
We propose an arterial network model based on one-dimensional hemodynamic equations to study the behavior of different vascular surgical bypass grafts in the case of an arterial occlusive pathology: a stenosis of the Right Iliac artery. We investigate the performances of three different bypass grafts (Aorto-Femoral, Axillo-Femoral and cross-over Femoral) depending on the degree of obstruction of the stenosis. Numerical simulations show that all bypass grafts are efficient since we retrieve in each case the healthy hemodynamics downstream of the stenosed region while ensuring at the same time a global healthy circulation...
March 11, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28291725/in-situ-operating-room-based-simulation-a-review
#11
Lily Owei, Christopher J Neylan, Raghavendra Rao, Robert C Caskey, Jon B Morris, Richard Sensenig, Ari D Brooks, Daniel T Dempsey, Noel N Williams, Joshua H Atkins, Dimitry Y Baranov, Kristoffel R Dumon
OBJECTIVE: To systematically review the literature surrounding operating room-based in situ training in surgery. METHODS: A systematic review was conducted of MEDLINE. The review was conducted based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology, and employed the Population, Intervention, Comparator, Outcome (PICO) structure to define inclusion/exclusion criteria. The Kirkpatrick model was used to further classify the outcome of in situ training when possible...
March 10, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28291699/in-silico-investigation-of-cornea-deformation-during-irrigation-aspiration-in-phacoemulsification-in-cataract-surgery
#12
Dariush Bayatpour, Omid Abouali, Alireza Ghaffarieh, Goodarz Ahmadi
To analyze the stress, strain and displacement of the human cornea under the action of negative intraocular pressure, which occurs during phacoemulsification in cataract surgery, a multidisciplinary approach including biomedical engineering, solid mechanics, numerical analysis, and fluid dynamics was used. Fluid-structure interaction method was implemented using 3-dimensional nonlinear finite element analysis of cornea tissue in conjunction with CFD analysis of anterior chamber fluid flow to study the deformation of the cornea under negative gage pressure during irrigation and aspiration (I/A)...
March 10, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28291491/an-augmented-reality-based-approach-for-surgical-telementoring-in-austere-environments
#13
Dan Andersen, Voicu Popescu, Maria Eugenia Cabrera, Aditya Shanghavi, Brian Mullis, Sherri Marley, Gerardo Gomez, Juan P Wachs
Telementoring can improve treatment of combat trauma injuries by connecting remote experienced surgeons with local less-experienced surgeons in an austere environment. Current surgical telementoring systems force the local surgeon to regularly shift focus away from the operating field to receive expert guidance, which can lead to surgery delays or even errors. The System for Telementoring with Augmented Reality (STAR) integrates expert-created annotations directly into the local surgeon's field of view. The local surgeon views the operating field by looking at a tablet display suspended between the patient and the surgeon that captures video of the surgical field...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28290396/three-dimensional-visualization-of-intracranial-tumors-with-cortical-surface-and-vasculature-from-routine-mr-sequences
#14
Zafar Neyaz, Rajendra V Phadke, Vivek Singh, Chaitanya Godbole
The simultaneous three-dimensional (3D) visualization of intracranial tumors, brain structures, skull, and vessels is desired by neurosurgeons to create a clear mental picture of the anatomical orientation of the surgical field prior to the surgical intervention. Different anatomical and pathological components are usually visualized separately on different magnetic resonance (MR) sequences; however, during surgery, they are tackled simultaneously. Another problem is that most present day MR workstations enable review of two-dimensional (2D) slices only with limited postprocessing options...
March 2017: Neurology India
https://www.readbyqxmd.com/read/28289915/numerical-modeling-of-hemodynamics-scenarios-of-patient-specific-coronary-artery-bypass-grafts
#15
Francesco Ballarin, Elena Faggiano, Andrea Manzoni, Alfio Quarteroni, Gianluigi Rozza, Sonia Ippolito, Carlo Antona, Roberto Scrofani
A fast computational framework is devised to the study of several configurations of patient-specific coronary artery bypass grafts. This is especially useful to perform a sensitivity analysis of the hemodynamics for different flow conditions occurring in native coronary arteries and bypass grafts, the investigation of the progression of the coronary artery disease and the choice of the most appropriate surgical procedure. A complete pipeline, from the acquisition of patient-specific medical images to fast parameterized computational simulations, is proposed...
March 13, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28289827/correlation-of-prediction-and-actual-outcome-of-three-dimensional-simulation-in-breast-augmentation-using-a-cloud-based-program
#16
Joshua Vorstenbosch, Avi Islur
BACKGROUND: Breast augmentation is among the most frequently performed cosmetic plastic surgeries. Providing patients with "realistic" 3D simulations of breast augmentation outcomes is becoming increasingly common. Until recently, such programs were costly and required significant equipment, training, and office space. New simple user-friendly cloud-based programs have been developed, but to date there remains a paucity of objective evidence comparing these 3D simulations with the post-operative outcomes...
March 13, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28288599/clinical-use-of-computational-modeling-for-surgical-planning-of-arteriovenous-fistula-for-hemodialysis
#17
Michela Bozzetto, Stefano Rota, Valentina Vigo, Francesco Casucci, Carlo Lomonte, Walter Morale, Massimo Senatore, Luigi Tazza, Massimo Lodi, Giuseppe Remuzzi, Andrea Remuzzi
BACKGROUND: Autogenous arteriovenous fistula (AVF) is the best vascular access (VA) for hemodialysis, but its creation is still a critical procedure. Physical examination, vascular mapping and doppler ultrasound (DUS) evaluation are recommended for AVF planning, but they can not provide direct indication on AVF outcome. We recently developed and validated in a clinical trial a patient-specific computational model to predict pre-operatively the blood flow volume (BFV) in AVF for different surgical configuration on the basis of demographic, clinical and DUS data...
March 14, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28287074/quantitative-assessment-of-cerenkov-luminescence-for-radioguided-brain-tumor-resection-surgery
#18
Justin S Klein, Gregory Mitchell, Simon Cherry
Cerenkov luminescence imaging (CLI) is a developing imaging modality that detects radiolabeled molecules via visible light emitted during the radioactive decay process. We used a Monte Carlo based computer simulation to quantitatively investigate CLI compared to direct detection of the ionizing radiation itself as an intraoperative imaging tool for assessment of brain tumor margins. Our brain tumor model consisted of a 1 mm spherical tumor remnant embedded up to 5 mm in depth below the surface of normal brain tissue...
March 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28287015/cost-consequence-analysis-of-two-different-active-flowable-hemostatic-matrices-in-spine-surgery-patients
#19
D Makhija, M Rock, S Ikeme, E Kuntze, J D Epstein, G Nicholson, J S Price, V Patel
OBJECTIVES: A recently published retrospective analysis comparing two different active flowable hemostatic matrices (FLOSEAL and SURGIFLO Kit with Thrombin) showed significantly increased resource use and complications (surgery time, risk of blood product transfusion, and amount of matrix used) with SURGIFLO use compared to FLOSEAL in major spine surgery, and also significantly increased surgical time with SURGIFLO use in severe spine surgery. This analysis was developed as a follow-up to this prior analysis, to evaluate the cost-consequence of using FLOSEAL vs SURGIFLO in major and severe spine surgery...
March 12, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28286528/evaluation-of-a-pilot-project-to-introduce-simulation-based-team-training-to-pediatric-surgery-trauma-room-care
#20
Markus Lehner, Ellen Heimberg, Florian Hoffmann, Oliver Heinzel, Hans-Joachim Kirschner, Martina Heinrich
Introduction. Several studies in pediatric trauma care have demonstrated substantial deficits in both prehospital and emergency department management. Methods. In February 2015 the PAEDSIM collaborative conducted a one and a half day interdisciplinary, simulation based team-training course in a simulated pediatric emergency department. 14 physicians from the medical fields of pediatric surgery, pediatric intensive care and emergency medicine, and anesthesia participated, as well as four pediatric nurses. After a theoretical introduction and familiarization with the simulator, course attendees alternately participated in six simulation scenarios and debriefings...
2017: International Journal of Pediatrics
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