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https://www.readbyqxmd.com/read/28803724/implementation-and-outcomes-of-an-evidence-based-precepting-program-for-burn-nurses
#1
Johnnie R Robbins, Krystal K Valdez-Delgado, Nicole W Caldwell, Linda H Yoder, Elizabeth J Hayes, Michaèl G Barba, Hope L Greeley, Colleen Mitchell, Elizabeth A Mann-Salinas
INTRODUCTION: There is significant nationwide interest in transitioning new and new-to-specialty nurses into practice, especially in burn care. Lack of a structured transition program in our Burn Center was recognized as a contributing factor for nursing dissatisfaction and increased turnover compared to other hospital units. Employee evaluations exposed a need for more didactic instruction, hands-on learning, and preceptor support. The goal of this project was to implement an evidence-based transition to practice program specific to the burn specialty...
August 10, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28803457/development-of-a-proficiency-based-virtual-reality-simulation-training-curriculum-for-laparoscopic-appendicectomy
#2
Pramudith Sirimanna, Marc A Gladman
BACKGROUND: Proficiency-based virtual reality (VR) training curricula improve intraoperative performance, but have not been developed for laparoscopic appendicectomy (LA). This study aimed to develop an evidence-based training curriculum for LA. METHODS: A total of 10 experienced (>50 LAs), eight intermediate (10-30 LAs) and 20 inexperienced (<10 LAs) operators performed guided and unguided LA tasks on a high-fidelity VR simulator using internationally relevant techniques...
August 13, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28800300/intraventricular-vector-flow-mapping-a-doppler-based-regularized-problem-with-automatic-model-selection
#3
Kondo Claude Assi, Etienne Gay, Christophe Chnafa, Simon Mendez, Franck Nicoud, Juan F P J Abascal, Pierre Lantelme, François Tournoux, Damien Garcia
We propose a regularized least-squares method for reconstructing 2D velocity vector fields within the left ventricular cavity from single-view color Doppler echocardiographic images. Vector flow mapping is formulated as a quadratic optimization problem based on an [Formula: see text]-norm minimization of a cost function composed of a Doppler data-fidelity term and a regularizer. The latter contains three physically interpretable expressions related to 2D mass conservation, Dirichlet boundary conditions, and smoothness...
August 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28798853/simulations-of-knotting-of-dna-during-genome-mapping
#4
Aashish Jain, Kevin D Dorfman
Genome mapping involves the confinement of long DNA molecules, in excess of 150 kilobase pairs, in nanochannels near the circa 50 nm persistence length of DNA. The fidelity of the map relies on the assumption that the DNA is linearized by channel confinement, which assumes the absence of knots. We have computed the probability of forming different knot types and the size of these knots for long chains (approximately 164 kilobase pairs) via pruned-enriched Rosenbluth method simulations of a discrete wormlike chain model of DNA in channel sizes ranging from 35 nm to 60 nm...
March 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28797933/simulation-debriefing-based-on-principles-of-transfer-of-learning-a-pilot-study
#5
Sandra Johnston, Fiona Coyer, Robyn Nash
Upon completion of undergraduate nursing courses, new graduates are expected to transition seamlessly into practice. Education providers face challenges in the preparation of undergraduate nurses due to increasing student numbers and decreasing availability of clinical placement sites. High fidelity patient simulation is an integral component of nursing curricula as an adjunct to preparation for clinical placement. Debriefing after simulation is an area where the underlying structure of problems can consciously be explored...
August 3, 2017: Nurse Education in Practice
https://www.readbyqxmd.com/read/28797595/effects-of-motion-segment-simulation-and-joint-positioning-on-spinal-loads-in-trunk-musculoskeletal-models
#6
F Ghezelbash, A H Eskandari, A Shirazi-Adl, N Arjmand, Z El-Ouaaid, A Plamondon
Musculoskeletal models represent spinal motion segments by spherical joints/beams with linear/nonlinear properties placed at various locations. We investigated the fidelity of these simplified models (i.e., spherical joints with/without rotational springs and beams considering nonlinear/linear properties) in predicting kinematics of the ligamentous spine in comparison with a detailed finite element (FE) model while considering various anterior-posterior joint placements. Using the simplified models with different joint offsets in a subject-specific musculoskeletal model, we computed local spinal forces during forward flexion and compared results with intradiscal pressure measurements...
July 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28789741/back-to-reality-the-use-of-the-presence-questionnaire-for-measurement-of-fidelity-in-simulation
#7
Dana E Brackney, Kimberly Priode
BACKGROUND AND PURPOSE: Simulation fidelity includes three aspects: physical, conceptual, and psychological. This study reports on strengths and limitations of the Presence Questionnaire (PQ) for measurement of fidelity in human patient simulation. METHODS: This nonexperimental correlational study includes a convenience sample of 83 undergraduate nursing students who participated in an emergency simulation and completed the PQ. Analysis of variance (ANOVA) on the 7-item PQ Realism subscale between groups who did or did not experience simulation equipment malfunction measured the PQ's sensitivity to this challenge to fidelity...
August 1, 2017: Journal of Nursing Measurement
https://www.readbyqxmd.com/read/28780253/biomechanics-of-human-parietal-pleura-in-uniaxial-extension
#8
Luis E Morales Tenorio, Kelsey J Devine, Jayme Lee, Timothy M Kowalewski, Victor H Barocas
Tension pneumothorax, a major preventable cause of battlefield death, often arises from chest trauma and is treated by needle decompression to release trapped air from the pleural cavity. Surgical simulation mannequins are often employed to train medical personnel to perform this procedure properly. Accurate reproduction of the mechanical behavior of the parietal pleura, especially in response to needle penetration, is essential to maximize the fidelity of these surgical simulators. To date, however, the design of pleura-simulating material has been largely empirical and based on subjective practitioner feel rather than on the tissue properties, which have remained unknown...
July 29, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28777114/use-of-a-virtual-learning-platform-for-distance-based-simulation-in-an-acute-care-nurse-practitioner-curriculum
#9
Margaret Carman, Shu Xu, Sharron Rushton, Benjamin A Smallheer, Denise Williams, Sathya Amarasekara, Marilyn H Oermann
BACKGROUND: Acute care nurse practitioner (ACNP) programs that use high-fidelity simulation as a teaching tool need to consider innovative strategies to provide distance-based students with learning experiences that are comparable to those in a simulation laboratory. OBJECTIVE: The purpose of this article is to describe the use of virtual simulations in a distance-based ACNP program and student performance in the simulations. METHOD: Virtual simulations using iSimulate were integrated into the ACNP course to promote the translation of content into a clinical context and enable students to develop their knowledge and decision-making skills...
September 2017: Dimensions of Critical Care Nursing: DCCN
https://www.readbyqxmd.com/read/28776326/a-comprehensive-pipeline-for-multi-resolution-modeling-of-the-mitral-valve-validation-computational-efficiency-and-predictive-capability
#10
Andrew Drach, Amir H Khalighi, Michael S Sacks
Multiple studies have demonstrated that the pathological geometries unique to each patient can affect the durability of mitral valve (MV) repairs. While computational modeling of the MV is a promising approach to improve the surgical outcomes, the complex MV geometry precludes use of simplified models. Moreover, the lack of complete in-vivo geometric information presents significant challenges in the development of patient-specific computational models. There is thus a need to determine the level of detail necessary for predictive MV models...
August 3, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28775383/high-resolution-3-dimensional-imaging-of-the-human-cardiac-conduction-system-from-microanatomy-to-mathematical-modeling
#11
Robert S Stephenson, Andrew Atkinson, Petros Kottas, Filip Perde, Fatemeh Jafarzadeh, Mike Bateman, Paul A Iaizzo, Jichao Zhao, Henggui Zhang, Robert H Anderson, Jonathan C Jarvis, Halina Dobrzynski
Cardiac arrhythmias and conduction disturbances are accompanied by structural remodelling of the specialised cardiomyocytes known collectively as the cardiac conduction system. Here, using contrast enhanced micro-computed tomography, we present, in attitudinally appropriate fashion, the first 3-dimensional representations of the cardiac conduction system within the intact human heart. We show that cardiomyocyte orientation can be extracted from these datasets at spatial resolutions approaching the single cell...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28774503/the-role-of-simulation-in-microsurgical-training
#12
Evgenios Evgeniou, Harriet Walker, Sameer Gujral
Simulation has been established as an integral part of microsurgical training. The aim of this study was to assess and categorize the various simulation models in relation to the complexity of the microsurgical skill being taught and analyze the assessment methods commonly employed in microsurgical simulation training. Numerous courses have been established using simulation models. These models can be categorized, according to the level of complexity of the skill being taught, into basic, intermediate, and advanced...
July 31, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28765631/transferring-arbitrary-d-dimensional-quantum-states-of-a-superconducting-transmon-qudit-in-circuit-qed
#13
Tong Liu, Qi-Ping Su, Jin-Hu Yang, Yu Zhang, Shao-Jie Xiong, Jin-Ming Liu, Chui-Ping Yang
A qudit (d-level quantum system) has a large Hilbert space and thus can be used to achieve many quantum information and communication tasks. Here, we propose a method to transfer arbitrary d-dimensional quantum states (known or unknown) between two superconducting transmon qudits coupled to a single cavity. The state transfer can be performed by employing resonant interactions only. In addition, quantum states can be deterministically transferred without measurement. Numerical simulations show that high-fidelity transfer of quantum states between two superconducting transmon qudits (d ≤ 5) is feasible with current circuit QED technology...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28758403/ab-initio-computations-and-active-thermochemical-tables-hand-in-hand-heats-of-formation-of-core-combustion-species
#14
Stephen J Klippenstein, Lawrence B Harding, Branko Ruscic
The fidelity of combustion simulations is strongly dependent on the accuracy of the underlying thermochemical properties for the core combustion species that arise as intermediates and products in the chemical conversion of most fuels. High level theoretical evaluations are coupled with a wide-ranging implementation of the Active Thermochemical Tables (ATcT) approach to obtain well-validated high fidelity predictions for the 0 K heat of formation for a large set of core combustion species. In particular, high level ab initio electronic structure based predictions are obtained for a set of 348 C, N, O, and H containing species, which corresponds to essentially all core combustion species with 34 or fewer electrons...
July 31, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28754411/acceleration-tracking-control-combining-adaptive-control-and-off-line-compensators-for-six-degree-of-freedom-electro-hydraulic-shaking-tables
#15
Gang Shen, Xiang Li, Zhencai Zhu, Yu Tang, Weidong Zhu, Shanzeng Liu
An electro-hydraulic shaking table (EHST) is an essential experimental facility to simulate in real-time actual vibration situations. An adaptive controller combined with off-line compensators is proposed to improve the acceleration frequency bandwidth and tracking accuracy of a six-degree-of-freedom (6-DOF) EHST. A servo controller has been employed to implement acceleration closed-loop and coordinate control of the 6-DOF EHST. A recursive extended least-squares algorithm is employed to identify acceleration closed-loop transfer functions and a zero-phase-error tracking controller is used to design off-line inverse model compensators using the identified transfer functions...
July 25, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28750949/a-machine-learning-approach-for-real-time-modelling-of-tissue-deformation-in-image-guided-neurosurgery
#16
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 24, 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28740789/a-unique-lymphaticovenous-supermicrosurgery-training-curriculum-reflections-on-validation-and-competency-thresholds
#17
Georgios Pafitanis, Mitsunaga Narushima, Mitsunobu Harima, Ali Ghanem, Simon Myers, Isao Koshima
Supermicrosurgery is becoming a commonly used technique in various subspecialties of reconstructive surgery. However, there is a lack of standardization and validation in novel supermicrosurgical training. Current simulation training programs are not adequately focused on the challenges encountered during clinical supermicrosurgery practice. This article describes the authors' experience utilizing a supermicrosurgery competency-based training curriculum, in a simulation-based environment, toward safe clinical practice for lymphatic submillimeter supermicrovascular surgery...
June 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28740664/development-of-a-novel-ex-vivo-porcine-laparoscopic-heller-myotomy-and-nissen-fundoplication-training-model-toronto-lap-nissen-simulator
#18
Hideki Ujiie, Tatsuya Kato, Hsin-Pei Hu, Patrycja Bauer, Priya Patel, Hironobu Wada, Daiyoon Lee, Kosuke Fujino, Colin Schieman, Andrew Pierre, Thomas K Waddell, Shaf Keshavjee, Gail E Darling, Kazuhiro Yasufuku
BACKGROUND: Surgical trainees are required to develop competency in a variety of laparoscopic operations. Developing laparoscopic technical skills can be difficult as there has been a decrease in the number of procedures performed. This study aims to develop an inexpensive and anatomically relevant model for training in laparoscopic foregut procedures. METHODS: An ex vivo, anatomic model of the human upper abdomen was developed using intact porcine esophagus, stomach, diaphragm and spleen...
June 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28739164/a-sparse-representation-based-method-for-parcellation-of-the-resting-brain-and-its-application-to-treatment-resistant-major-depressive-disorder
#19
Ruiyang Ge, Daniel M Blumberger, Jonathan Downar, Zafiris J Daskalakis, Joseph C W Tham, Raymond W Lam, Fidel Vila-Rodriguez
BACKGROUND: Parcellating brain regions into functionally homogeneous subdivisions is critical for understanding normal and abnormal brain functions. NEW METHOD: In this study, we developed a new sparse representation-based parcellation method for functional magnetic resonance imaging (fMRI) data, and applied the new method to investigate functional insular subdivisions in treatment-resistant major depressive disorder (MDD). Realistic simulations were implemented to demonstrate the feasibility of the method...
July 22, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28732447/dna-polymerase-%C3%AE-active-site-favors-a-mutagenic-mispair-between-the-enol-form-of-deoxyguanosine-triphosphate-substrate-and-the-keto-form-of-thymidine-template-a-free-energy-perturbation-study
#20
Sergey N Maximoff, Shina C L Kamerlin, Jan Florian
Human DNA polymerase λ is an intermediate fidelity member of the X family, which plays a role in DNA repair. Recent X-ray diffraction structures of a ternary complex of a loop-deletion mutant of polymerase λ, a deoxyguanosine triphosphate analog and a gapped DNA show that guanine and thymine form a mutagenic mispair with an unexpected Watson-Crick-like geometry rather than a wobble geometry. Hence, there is an intriguing possibility that either thymine in the DNA or guanine in the deoxyguanosine triphosphate analog may spend a substantial fraction of time in a deprotonated or enol form (both are minor species in aqueous solution) in the active site of the polymerase λ mutant...
July 21, 2017: Journal of Physical Chemistry. B
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