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https://www.readbyqxmd.com/read/27933407/simvascular-an-open-source-pipeline-for-cardiovascular-simulation
#1
REVIEW
Adam Updegrove, Nathan M Wilson, Jameson Merkow, Hongzhi Lan, Alison L Marsden, Shawn C Shadden
Patient-specific cardiovascular simulation has become a paradigm in cardiovascular research and is emerging as a powerful tool in basic, translational and clinical research. In this paper we discuss the recent development of a fully open-source SimVascular software package, which provides a complete pipeline from medical image data segmentation to patient-specific blood flow simulation and analysis. This package serves as a research tool for cardiovascular modeling and simulation, and has contributed to numerous advances in personalized medicine, surgical planning and medical device design...
December 8, 2016: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27933290/validation-of-a-cochlear-implant-patient-specific-model-of-the-voltage-distribution-in-a-clinical-setting
#2
Waldo Nogueira, Daniel Schurzig, Andreas Büchner, Richard T Penninger, Waldemar Würfel
Cochlear Implants (CIs) are medical implantable devices that can restore the sense of hearing in people with profound hearing loss. Clinical trials assessing speech intelligibility in CI users have found large intersubject variability. One possibility to explain the variability is the individual differences in the interface created between electrodes of the CI and the auditory nerve. In order to understand the variability, models of the voltage distribution of the electrically stimulated cochlea may be useful...
2016: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/27932533/preoperative-proteinuria-and-reduced-glomerular-filtration-rate-predicts-renal-replacement-therapy-in-patients-supported-with-continuous-flow-left-ventricular-assist-devices
#3
Veli K Topkara, Ellie J Coromilas, Arthur Reshad Garan, Randall C Li, Francesco Castagna, Douglas L Jennings, Melana Yuzefpolskaya, Koji Takeda, Hiroo Takayama, Robert N Sladen, Donna M Mancini, Yoshifumi Naka, Jai Radhakrishnan, Paolo C Colombo
BACKGROUND: Renal failure requiring renal replacement therapy (RRT) has detrimental effects on quality of life and survival of patients with continuous-flow left ventricular assist devices (CF-LVADs). Current guidelines do not offer a decision-making algorithm for CF-LVAD candidates with poor baseline renal function. Objective of this study was to identify risk factors associated with RRT after CF-LVAD implantation. METHODS AND RESULTS: Three hundred and eighty-nine consecutive patients underwent contemporary CF-LVAD implantation at the Columbia University Medical Center between January 2004 and August 2015...
December 2016: Circulation. Heart Failure
https://www.readbyqxmd.com/read/27931630/infectious-complications-in-gastrointestinal-endoscopy-and-their-prevention
#4
REVIEW
Julia Kovaleva
Gastrointestinal endoscopes are medical devices that have been associated with outbreaks of health care-associated infections. Because of the severity and limited treatment options of infections caused by multidrug-resistant Enterobacteriaceae and Pseudomonas aeruginosa, considerable attention has been paid to detection and prevention of these post-endoscopic outbreaks. Endoscope reprocessing involves cleaning, high-level disinfection/sterilization followed by rinsing and drying before storage. Failure of the decontamination process implies the risk of settlement of biofilm producing species in endoscope channels...
October 2016: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/27931628/the-role-of-equipment-in-endoscopic-complications
#5
REVIEW
Stepan Suchanek, Tomas Grega, Miroslav Zavoral
The role of the surrounding equipment in endoscopic complications has not been published widely. However, an adequate understanding of the advantages and disadvantages of such devices might be helpful to avoid unnecessary problems during endoscopy. This is an overview of the basic principles, benefits and possible harms of electrical power units, medical gases and vital sign monitoring equipment. The aim of this review is to summarize current knowledge about the approach to the electrosurgical unit settings; periprocedural precautions, minimizing the risk of interference between endoscopic equipment and other electrical devices; the appropriate selection of instruments regarding the electrosurgical outcome and the role of carbon dioxide, argon plasma coagulation, pulse oximetry and capnography...
October 2016: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/27931004/increasing-trend-of-wearables-and-multimodal-interface-for-human-activity-monitoring-a-review
#6
REVIEW
Preeti Kumari, Lini Mathew, Poonal Syal
Activity recognition technology is one of the most important technologies for life-logging and for the care of elderly persons. Elderly people prefer to live in their own houses, within their own locality. If, they are capable to do so, several benefits can follow in terms of society and economy. However, living alone may have high risks. Wearable sensors have been developed to overcome these risks and these sensors are supposed to be ready for medical uses. It can help in monitoring the wellness of elderly persons living alone by unobtrusively monitoring their daily activities...
December 2, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27930909/fda-regulation-of-neurological-and-physical-medicine-devices-access-to-safe-and-effective-neurotechnologies-for-all-americans
#7
Leigh Anderson, Patrick Antkowiak, Aden Asefa, Amber Ballard, Tushar Bansal, Ayo Bello, Bernard Berne, Kristen Bowsher, Bennett Blumenkopf, Ian Broverman, Mohamad Bydon, Kuo Chao, Peter Como, Karlene Cork, Ann Costello, Kathryn De Laurentis, Angela DeMarco, Heather Dean, John Doucet, Bradley Dworak, Lisa Epperson, Eric Franca, Naz Ghassemian, Chandramallika Ghosh, Anupama Govindarajan, Jay Gupta, Stacie Gutowski, Robert Herrmann, Michael Hoffmann, William Heetderks, Steven Hsu, Daryl Kaufman, Erin Keegan, Gregg Kittlesen, Kevin Khuu, Hyung Lee, Larry Lo, Ian Marcus, Timothy Marjenin, Binoy Mathews, Sanjay Misra, Vivek Pinto, Vesper Ramos, Samuel Raben, Avena Russell, Devjani Saha, Joonil Seog, Christian Shenouda, Myra Smith, Xiaorui Tang, Kelliann Wachrathit, Jaime Waterhouse, Dhanya Williams, Xiaolin Zheng, Carlos Peña
The United States Food and Drug Administration (FDA) ensures that patients in the U.S. have access to safe and effective medical devices. The Division of Neurological and Physical Medicine Devices reviews medical technologies that interface with the nervous system. This article addresses how to navigate the FDA's regulatory landscape to successfully bring medical devices to patients.
December 7, 2016: Neuron
https://www.readbyqxmd.com/read/27929508/development-of-a-universal-medical-x-ray-imaging-phantom-prototype
#8
Annemari Groenewald, Willem A Groenewald
Diagnostic X-ray imaging depends on the maintenance of image quality that allows for proper diagnosis of medical conditions. Maintenance of image quality requires quality assurance programs on the various X-ray modalities, which consist of pro-jection radiography (including mobile X-ray units), fluoroscopy, mammography, and computed tomography (CT) scanning. Currently a variety of modality-specific phantoms are used to perform quality assurance (QA) tests. These phantoms are not only expensive, but suitably trained personnel are needed to successfully use them and interpret the results...
November 8, 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/27929275/erectile-dysfunction
#9
Karl T Rew, Joel J Heidelbaugh
Erectile dysfunction (ED) is the inability to achieve or maintain an erection sufficient for satisfactory sexual performance. It is common, affecting at least 12 million U.S. men. The five-question International Index of Erectile Function allows rapid clinical assessment of ED. The condition can be caused by vascular, neurologic, psychological, and hormonal factors. Common conditions related to ED include diabetes mellitus, hypertension, hyperlipidemia, obesity, testosterone deficiency, and prostate cancer treatment...
November 15, 2016: American Family Physician
https://www.readbyqxmd.com/read/27929181/smartphone-based-hand-held-quantitative-phase-microscope-using-the-transport-of-intensity-equation-method
#10
Xin Meng, Huachuan Huang, Keding Yan, Xiaolin Tian, Wei Yu, Haoyang Cui, Yan Kong, Liang Xue, Cheng Liu, Shouyu Wang
In order to realize high contrast imaging with portable devices for potential mobile healthcare, we demonstrate a hand-held smartphone based quantitative phase microscope using the transport of intensity equation method. With a cost-effective illumination source and compact microscope system, multi-focal images of samples can be captured by the smartphone's camera via manual focusing. Phase retrieval is performed using a self-developed Android application, which calculates sample phases from multi-plane intensities via solving the Poisson equation...
December 8, 2016: Lab on a Chip
https://www.readbyqxmd.com/read/27928968/rationale-for-assessing-safety-and-efficacy-of-drug-candidates-alone-and-in-combination-with-medical-devices-the-case-study-of-spinalontm
#11
Pierre A Guertin
The aim of this review is to describe the rationale and main underlying reasons for undertaking, during clinical development, the study of drug candidates used separately and/or in combination with other technologies. To ease comprehension, reference will be made to the case of SpinalonTM, a new fixed-dose combination (FDC) product composed of levodopa/carbidopa/buspirone. This drug is capable of triggering, within minutes after a single administration orally, 45 minute- episodes of basic involuntary 'reflex' walking in paraplegic animals...
December 7, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27928879/minimally-invasive-glaucoma-surgery-as-primary-stand-alone-surgery-for-glaucoma
#12
REVIEW
Nathan M Kerr, Jing Wang, Keith Barton
Recently many new devices and procedures have been developed to lower intraocular pressure in a less invasive and purportedly safer manner than traditional glaucoma surgery. These new devices might encourage an earlier transition to surgery and reduce the long term commitment to topical glaucoma medications with their associated compliance and intolerance issues. While often seen as an adjunct to cataract surgery, a growing body of evidence suggests that primary MIGS may be a viable initial treatment option...
December 8, 2016: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/27928781/mechanism-of-fluorescence-enhancement-of-biosynthesized-xfe2o4-bifeo3-x-cr-mn-co-or-ni-membranes
#13
Liang Bian, Hai-Long Li, Hai-Liang Dong, Fa-Qin Dong, Mian-Xin Song, Li-Sheng Wang, Wen-Ping Hou, Lei Gao, Xiao-Yan Zhang, Tian-Liang Zhou, Guang-Ai Sun, Xin-Xi Li, Lei Xie
Ferrites-bismuth ferrite is an intriguing option for medical diagnostic imaging device due to its magnetoelectric and enhanced near-infrared fluorescent properties. However, the embedded XFO nanoparticles are randomly located on the BFO membranes, making implementation in devices difficult. To overcome this, we present a facile bio-approach to produce XFe2O4-BiFeO3 (XFO-BFO) (X = Cr, Mn, Co, or Ni) membranes using Shewanella oneidensis MR-1. The perovskite BFO enhances the fluorescence intensity (at 660 and 832 nm) and surface potential difference (-469 ~ 385 meV and -80 ~ 525 meV) of the embedded spinel XFO...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27928726/evaluating-the-safety-profile-of-non-active-implantable-medical-devices-compared-with-medicines
#14
REVIEW
Josep Pane, Preciosa M Coloma, Katia M C Verhamme, Miriam C J M Sturkenboom, Irene Rebollo
Recent safety issues involving non-active implantable medical devices (NAIMDs) have highlighted the need for better pre-market and post-market evaluation. Some stakeholders have argued that certain features of medicine safety evaluation should also be applied to medical devices. Our objectives were to compare the current processes and methodologies for the assessment of NAIMD safety profiles with those for medicines, identify potential gaps, and make recommendations for the adoption of new methodologies for the ongoing benefit-risk monitoring of these devices throughout their entire life cycle...
December 7, 2016: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/27928595/-left-ventricular-unloading-in-cardiogenic-shock
#15
A Schäfer, J Bauersachs
Cardiogenic shock is an acute life-threatening condition, which results in impaired end-organ perfusion and oxygenation. Invasive ventilation and medicinal treatment with inotropes or vasopressors are necessary in most cases; however, they are also associated with reduced long-term prognosis. Frequently, medical treatment is not even sufficient to stabilize the patient; therefore, dedicated mechanical circulatory support devices that actively reduce the load on the left ventricle were developed to allow myocardial recovery or to gain time until definitive treatment...
December 7, 2016: Herz
https://www.readbyqxmd.com/read/27928226/achieving-timely-percutaneous-reperfusion-for-rural-st-elevation-myocardial-infarction-patients-by-direct-transport-to-an-urban-pci-hospital
#16
Charles-Lwanga K Bennin, Saif Ibrahim, Farah Al-Saffar, Lyndon C Box, Joel A Strom
BACKGROUNDS: ST-elevation myocardial infarction (STEMI) guidelines recommend reperfusion by primary percutaneous coronary intervention (PCI) ≤ 90 min from time of first medical contact (FMC). This strategy is challenging in rural areas lacking a nearby PCI-capable hospital. Recommended reperfusion times can be achieved for STEMI patients presenting in rural areas without a nearby PCI-capable hospital by ground transportation to a central PCI-capable hospital by use of protocol-driven emergency medical service (EMS) STEMI field triage protocol...
October 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/27926652/hysteroscopic-sterilization-with-essure-summary-of-the-u-s-food-and-drug-administration-actions-and-policy-implications-for-postmarketing-surveillance
#17
Jessica R Walter, Comeron W Ghobadi, Emily Hayman, Shuai Xu
In September 2015, the U.S. Food and Drug Administration (FDA) convened a meeting of the Obstetrics and Gynecology Advisory Board Committee to address the sudden increase of patient-reported adverse events surrounding Essure, a Class III device offering a less invasive method for permanent female sterilization. After a review of the premarketing and postmarketing data and existing scientific literature, the FDA concluded there was insufficient evidence to remove the device from the market. However, the FDA did release a new guidance document requiring a black box warning for the device and ordered a new postmarketing study comparing Essure's safety and efficacy with laparoscopic tubal sterilization...
December 2, 2016: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27925849/development-and-prospective-federal-state-wide-evaluation-of-a-device-for-height-based-dose-recommendations-in-prehospital-pediatric-emergencies-a-simple-tool-to-prevent-most-severe-drug-errors
#18
Jost Kaufmann, Bernhard Roth, Thomas Engelhardt, Alex Lechleuthner, Michael Laschat, Christoph Hadamitzky, Frank Wappler, Martin Hellmich
OBJECTIVE: Drug dosing errors pose a particular threat to children in prehospital emergency care. With the Pediatric emergency ruler (PaedER), we developed a simple height-based dose recommendation system and evaluated its effectiveness in a pre-post interventional trial as the Ethics Committee disapproved randomization due to the expected positive effect of the PaedER on outcome. METHODS: Pre-interventional data were retrospectively retrieved from the electronic records and medical protocols of the Cologne Emergency Medical Service over a two-year period prior to the introduction of the PaedER...
December 7, 2016: Prehospital Emergency Care
https://www.readbyqxmd.com/read/27925592/enzyme-free-scalable-dna-digital-design-techniques-a-review
#19
Aby Konampurath George, Harpreet Singh
With the recent developments in DNA nanotechnology, DNA has been used as the basic building block for the design of nanostructures, autonomous molecular motors, various devices, and circuits. DNA is considered as a possible candidate for replacing silicon for designing digital circuits in a near future, especially in implantable medical devices, because of its parallelism, computational powers, small size, light weight, and compatibility with bio-signals. The research in DNA digital design is in early stages of development, and electrical and computer engineers are not much attracted towards this field...
December 2, 2016: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/27925381/doctors-use-of-mobile-devices-in-the-clinical-setting-a-mixed-methods-study
#20
Arany Nerminathan, Amanda Harrison, Megan Phelps, Karen M Scott
AIM: To explore how doctors use mobile devices in the clinical setting and understand drivers for use. METHODS: A mixed methods study was used with doctors in a paediatric and adult teaching hospital in 2013. A paper based survey examined mobile device usage data by doctors in the clinical setting. Focus groups explored doctors' reasons for using or refraining from using mobile devices in the clinical setting, and their attitudes about others' use. RESULTS: The survey, completed by 109 doctors, showed that 91% owned a smartphone and 88% used their mobile devices frequently in the clinical setting...
December 7, 2016: Internal Medicine Journal
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