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Simulation medicine

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https://www.readbyqxmd.com/read/29244002/higher-recall-in-metagenomic-sequence-classification-exploiting-overlapping-reads
#1
Samuele Girotto, Matteo Comin, Cinzia Pizzi
BACKGROUND: In recent years several different fields, such as ecology, medicine and microbiology, have experienced an unprecedented development due to the possibility of direct sequencing of microbioimic samples. Among problems that researchers in the field have to deal with, taxonomic classification of metagenomic reads is one of the most challenging. State of the art methods classify single reads with almost 100% precision. However, very often, the performance in terms of recall falls at about 50%...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29243338/a-partially-linear-additive-model-for-clustered-proportion-data
#2
Weihua Zhao, Heng Lian, Dipankar Bandyopadhyay
Proportion data with support lying in the interval [0,1] are a commonplace in various domains of medicine and public health. When these data are available as clusters, it is important to correctly incorporate the within-cluster correlation to improve the estimation efficiency while conducting regression-based risk evaluation. Furthermore, covariates may exhibit a nonlinear relationship with the (proportion) responses while quantifying disease status. As an alternative to various existing classical methods for modeling proportion data (such as augmented Beta regression) that uses maximum likelihood, or generalized estimating equations, we develop a partially linear additive model based on the quadratic inference function...
December 15, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/29243295/extended-phase-graph-formalism-for-systems-with-magnetization-transfer-and-exchange
#3
Shaihan J Malik, Rui Pedro A G Teixeira, Joseph V Hajnal
PURPOSE: An extended phase graph framework (EPG-X) for modeling systems with exchange or magnetization transfer (MT) is proposed. THEORY: EPG-X models coupled two-compartment systems by describing each compartment with separate phase graphs that exchange during evolution periods. There are two variants: EPG-X(BM) for systems governed by the Bloch-McConnell equations, and EPG-X(MT) for the pulsed MT formalism. For the MT case, the "bound" protons have no transverse components, so their phase graph consists of only longitudinal states...
December 15, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29242397/whole-body-voxel-based-personalized-dosimetry-multiple-voxel-s-value-approach-for-heterogeneous-media-with-non-uniform-activity-distributions
#4
Min Sun Lee, Joong Hyun Kim, Jin Chul Paeng, Keon Wook Kang, Jae Min Jeong, Dong Soo Lee, Jae Sung Lee
Personalized dosimetry with high accuracy is becoming more important because of the growing interests in personalized medicine and targeted radionuclide therapy. Voxel-based dosimetry using dose point kernel or voxel S-value (VSV) convolution is available. However, these approaches do not consider medium heterogeneity. Here, we propose a new method for whole-body voxel-based personalized dosimetry for heterogeneous media with non-uniform activity distributions, which is referred to as the multiple VSV approach...
December 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29241901/comparison-of-timed-automata-with-discrete-event-simulation-for-modeling-of-biomarker-based-treatment-decisions-an-illustration-for-metastatic-castration-resistant-prostate-cancer
#5
Koen Degeling, Stefano Schivo, Niven Mehra, Hendrik Koffijberg, Rom Langerak, Johann S de Bono, Maarten J IJzerman
BACKGROUND: With the advent of personalized medicine, the field of health economic modeling is being challenged and the use of patient-level dynamic modeling techniques might be required. OBJECTIVES: To illustrate the usability of two such techniques, timed automata (TA) and discrete event simulation (DES), for modeling personalized treatment decisions. METHODS: An early health technology assessment on the use of circulating tumor cells, compared with prostate-specific antigen and bone scintigraphy, to inform treatment decisions in metastatic castration-resistant prostate cancer was performed...
December 2017: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/29239679/primary-care-variability-in-patients-at-higher-risk-for-colorectal-cancer-evaluation-of-screening-and-preventive-care-practices
#6
John Peabody, Juan-Sebastien Salvidar, Eric Swagel, Steven Fugaro, David Paculdo, Mary Tran
OBJECTIVE: Sub-optimal colorectal cancer (CRC) evaluations have been attributed to both physician and patient factors. The primary objective of this study was to evaluate physician practice variation in patients with a higher risk of CRC. We wanted to identify the physician characteristics and the types of patient that were associated with missed screening opportunities; we also explored whether screening for CRC served as a proxy for better preventive care practices. METHODS: 213 board-certified family and internal medicine physicians participated in the study, conducted between September and December 2016...
December 14, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29237692/does-computer-simulation-help-facilitate-personalized-precision-medicine-for-the-use-of-warfarin
#7
EDITORIAL
Shinichi Goto, Shinya Goto
No abstract text is available yet for this article.
December 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/29237491/cost-effectiveness-of-enzyme-replacement-therapy-with-alglucosidase-alfa-in-adult-patients-with-pompe-disease
#8
Tim A Kanters, Ans T van der Ploeg, Michelle E Kruijshaar, Dimitris Rizopoulos, W Ken Redekop, Maureen P M H Rutten-van Mӧlken, Leona Hakkaart-van Roijen
BACKGROUND: Pompe disease is a rare, progressive, metabolic disease, and the first treatable inheritable muscle disorder. Enzyme replacement therapy (ERT) with alglucosidase alfa is disease specific and the only medicinal product authorized for the treatment of Pompe disease. Costs of ERT are very high as for most orphan drugs. This study investigates the cost-effectiveness of ERT compared to supportive treatment in adult patients with Pompe disease. METHODS: Survival probabilities were estimated from an international observational dataset (n = 283) using a time-dependent Cox model...
December 13, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/29236642/noninvasive-cardiac-radiation-for-ablation-of-ventricular-tachycardia
#9
Phillip S Cuculich, Matthew R Schill, Rojano Kashani, Sasa Mutic, Adam Lang, Daniel Cooper, Mitchell Faddis, Marye Gleva, Amit Noheria, Timothy W Smith, Dennis Hallahan, Yoram Rudy, Clifford G Robinson
BACKGROUND: Recent advances have enabled noninvasive mapping of cardiac arrhythmias with electrocardiographic imaging and noninvasive delivery of precise ablative radiation with stereotactic body radiation therapy (SBRT). We combined these techniques to perform catheter-free, electrophysiology-guided, noninvasive cardiac radioablation for ventricular tachycardia. METHODS: We targeted arrhythmogenic scar regions by combining anatomical imaging with noninvasive electrocardiographic imaging during ventricular tachycardia that was induced by means of an implantable cardioverter-defibrillator (ICD)...
December 14, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29235449/evaluation-of-skin-absorbed-doses-during-manipulation-of-radioactive-sources-a-comparison-between-varskin-code-and-monte-carlo-simulations
#10
Ernesto Amato, Antonio Italiano
The evaluation of skin doses during manipulation of radioactive sources can be a critical issue, worth using the most accurate calculation strategies available. The aim of this work was to compare the results of the analytical approach used in VARSKIN with the simulation of radiation transport and interaction by Monte Carlo calculations in GAMOS (GEANT4-based Architecture for Medicine-Oriented Simulations), and to provide an accurate and versatile tool for the evaluation of skin doses from radionuclide sources of any realistic shape (e...
December 13, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29233854/efficacy-of-educational-video-game-versus-traditional-educational-apps-at-improving-physician-decision-making-in-trauma-triage-randomized-controlled-trial
#11
Deepika Mohan, Coreen Farris, Baruch Fischhoff, Matthew R Rosengart, Derek C Angus, Donald M Yealy, David J Wallace, Amber E Barnato
OBJECTIVE: To determine whether a behavioral intervention delivered through a video game can improve the appropriateness of trauma triage decisions in the emergency department of non-trauma centers. DESIGN: Randomized clinical trial. SETTING: Online intervention in national sample of emergency medicine physicians who make triage decisions at US hospitals. PARTICIPANTS: 368 emergency medicine physicians primarily working at non-trauma centers...
December 12, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/29233433/interprofessional-objective-structured-teaching-exercise-ioste-to-train-preceptors
#12
Livia R M McCutcheon, Kathryn Whitcomb, Craig D Cox, Mary S Klein, Hansel Burley, Terrance Youngblood, Cynthia Raehl
BACKGROUND AND PURPOSE: Interprofessional education (IPE) is important in the education of all health care students, yet limited IPE training has been provided to preceptors who train these students in the clinical setting. Simulation using the standardized student model has been used to train health care preceptors in medicine. To our knowledge, there are no reports utilizing interprofessional objective structured teaching exercises (iOSTE) to train pharmacy preceptors. The primary objectives of this pilot study were to evaluate the effects of iOSTE on the pharmacy preceptors' perceived importance of the Interprofessional Education Collaborative (IPEC) core competencies and confidence in precepting interprofessional students...
July 2017: Currents in Pharmacy Teaching & Learning
https://www.readbyqxmd.com/read/29233306/integration-and-assessment-of-the-situation-background-assessment-recommendation-framework-into-a-pharmacotherapy-skills-laboratory-for-interprofessional-communication-and-documentation
#13
Susanne Barnett, Michael W Nagy, Robert C Hakim
BACKGROUND AND PURPOSE: The situation-background-assessment-recommendation (SBAR) framework is a commonly used method to structure verbal communication in the nursing and medicine disciplines and increases the effectiveness of interprofessional communication. The purpose of this manuscript is to describe how the SBAR framework is integrated into a pharmacotherapy skills laboratory for interprofessional communication and to report on student agreement of perceived realism, preparedness, and fairness of assessment relating to simulated SBAR activities...
September 2017: Currents in Pharmacy Teaching & Learning
https://www.readbyqxmd.com/read/29232300/three-dimensional-printing-of-life-like-models-for-simulation-and-training-of-minimally-invasive-cardiac-surgery
#14
Toshiyuki Yamada, Motohiko Osako, Tomoya Uchimuro, Ryogen Yoon, Toshiaki Morikawa, Maki Sugimoto, Hisao Suda, Hideyuki Shimizu
OBJECTIVE: As the use of minimally invasive surgery in cardiothoracic surgery increases, so does the need for simulation and training. We developed a heart model for simulation and training of minimally invasive cardiac surgery, particularly minimally invasive mitral valve repair using our new three-dimensional printing system. METHODS: Digital imaging and communication in medicine data from patient computed tomography, three-dimensional computer-aided design, and three-dimensional printing helped create replicas of the heart and thoracic cavity...
December 7, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/29230860/cardiac-gating-using-scattering-of-an-8-channel-parallel-transmit-coil-at-7t
#15
Sven H F Jaeschke, Matthew D Robson, Aaron T Hess
PURPOSE: To establish a cardiac signal from scattering matrix or scattering coefficient measurements made on a 7T 8-channel parallel transmit (pTx) system, and to evaluate its use for cardiac gating. METHODS: Measurements of the scattering matrix and scattering coefficients were acquired using a monitoring pulse sequence and during a standard cine acquisition, respectively. Postprocessing used an independent component analysis and gating feature identification. The effect of the phase of the excitation radiofrequency (RF) field ( B1+ shim) on the cardiac signal was simulated for multiple B1+ shim configurations, and cine images were reconstructed from both the scattering coefficients and electrocardiogram (ECG)...
December 11, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29230656/development-of-gate-monte-carlo-simulation-for-a-csi-pixelated-gamma-camera-dedicated-to-high-resolution-animal-spect
#16
Payvand Taherparvar, Alireza Sadremomtaz
GATE is currently considered in scintigraphic imaging as a powerful tool to develop, design and optimize nuclear medicine modalities. This paper describes the GATE simulation of a pixelated gamma camera which is dedicated to high resolution of small animals imaging. It consists of a CsI(Na) crystal array coupled to position sensitive photomultiplier tube. The simulation model includes photon tracking through low energy high resolution hexagonal parallel holes collimator, CsI(Na) pixelated crystal, back-compartment, and camera shielding...
December 11, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29228882/medical-education-and-human-trafficking-using-simulation
#17
Hanni Stoklosa, Michelle Lyman, Carrie Bohnert, Olivia Mittel
Healthcare providers have the potential to play a crucial role in human trafficking prevention, identification, and intervention. However, trafficked patients are often unidentified due to lack of education and preparation available to healthcare professionals at all levels of training and practice. To increase victim identification in healthcare settings, providers need to be educated about the issue of trafficking and its clinical presentations in an interactive format that maximizes learning and ultimately patient-centered outcomes...
2017: Medical Education Online
https://www.readbyqxmd.com/read/29226975/mathematical-modeling-and-simulation-in-animal-health-part-iii-using-nonlinear-mixed-effects-to-characterize-and-quantify-variability-in-drug-pharmacokinetics
#18
REVIEW
C Bon, P L Toutain, D Concordet, R Gehring, T Martin-Jimenez, J Smith, L Pelligand, M Martinez, T Whittem, J E Riviere, J P Mochel
A common feature of human and veterinary pharmacokinetics is the importance of identifying and quantifying the key determinants of between-patient variability in drug disposition and effects. Some of these attributes are already well known to the field of human pharmacology such as bodyweight, age, or sex, while others are more specific to veterinary medicine, such as species, breed, and social behavior. Identification of these attributes has the potential to allow a better and more tailored use of therapeutic drugs both in companion and food-producing animals...
December 11, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29225716/n-of-1-design-and-its-applications-to-personalized-treatment-studies
#19
Tailiang Xie, Zhuoxin Yu
N-of-1 trial is a type of clinical trial which has been applied in chronic recurrent conditions that require long-term non-curative treatment. In this type of trials, each patient will be randomly assigned to one of the treatment sequences and repeatedly crossed over two or more treatments of interests. Through this cross-comparing method (cross-over phase), investigator can identify an optimal treatment (medicine or therapy) for the patient and treat the patient with the optimal treatment in an extension phase...
2017: Statistics in Biosciences
https://www.readbyqxmd.com/read/29225709/immunomodulatory-effects-of-human-cryopreserved-viable-amniotic-membrane-in-a-pro-inflammatory-environment-in-vitro
#20
Claire E Witherel, Tony Yu, Mark Concannon, Will Dampier, Kara L Spiller
Introduction: Chronic wounds remain a major clinical challenge. Human cryopreserved viable amniotic membrane (hCVAM) is among the most successful therapies, but the mechanisms of action remain loosely defined. Because proper regulation of macrophage behavior is critical for wound healing with biomaterial therapies, we hypothesized that hCVAM would positively regulate macrophage behavior in vitro, and that soluble factors released from the hCVAM would be important for this effect. Materials and Methods: Primary human pro-inflammatory (M1) macrophages were seeded directly onto intact hCVAM or cultured in separation via transwell inserts (Soluble Factors) in the presence of pro-inflammatory stimuli (interferon-γ and lipopolysaccharide) to simulate the chronic wound environment...
October 2017: Cellular and Molecular Bioengineering
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