Read by QxMD icon Read


Marlena Gauza-Włodarczyk, Leszek Kubisz, Sławomir Mielcarek, Dariusz Włodarczyk
The increased interest in fish collagen is a consequence of the risk of exposure to Creutzfeld-Jacob disease (CJD) and the bovine spongiform encephalopathy (BSE), whose occurrence is associated with prions carried by bovine collagen. Collagen is the main biopolymer in living organisms and the main component of the skin and bones. Until the discovery of the BSE, bovine collagen had been widely used. The BSE epidemic increased the interest in new sources of collagen such as fish skin collagen (FSC) and its properties...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Woomin Lee, Kenneth David Kihm, Hong Goo Kim, Seungha Shin, Changhyuk Lee, Jae Sung Park, Sosan Cheon, Oh Myoung Kwon, Gyumin Lim, Woorim Lee
Manipulation of the chemical vapor deposition graphene synthesis conditions, such as operating P, T, heating/cooling time intervals, and precursor gas concentration ratios (CH4/H2), allowed for synthesis of polycrystalline single-layered graphene with controlled grain sizes. The graphene samples were then suspended on 8 μm diameter patterned holes on a silicon-nitride (Si3N4) substrate, and the in-plane thermal conductivities k(T) for 320 K < T < 510 K were measured to be 2660-1230, 1890-1020, and 680-340 W/m·K for average grain sizes of 4...
March 6, 2017: Nano Letters
Sundeep Mishra
There is a robust debate going on among the Medical Device stake-holders whether FDA is better or CE mark or something else. Currently process of obtaining an FDA approval is bogged down by ever-increasing unpredictability, inconsistency, prolonged time, and huge expense but CE mark has its own problems. Historically, the Japanese review process has tended to be the slowest among the big three but recently with the introduction of accelerated review process there has been a significant progress. While the goal of an innovator/manufacturer is to develop, manufacture and market a medical device that addresses an unmet clinical need, the requisite regulatory approval process can be very confusing...
January 2017: Indian Heart Journal
Y Bayon, M Bohner, D Eglin, P Procter, R G Richards, J Weber, D I Zeugolis
The European Society for Biomaterials 2015 Translational Research Symposium focused on 'Innovating in the Medical Device Industry - Challenges & Opportunities' from different perspectives, i.e., from a non-profit research organisation to a syndicate of small and medium-sized companies and large companies. Lecturers from regulatory consultants, industry and research institutions described the innovation process and regulatory processes (e.g., 510K, PMA, combination product) towards market approval. The aim of the present article is to summarise and explain the main statements made during the symposium, in terms of challenges and opportunities for medical device industries, in a constantly changing customer and regulatory environment...
September 2016: Journal of Materials Science. Materials in Medicine
Chun K Yang, Thais O Polanco, John C Lantis
INTRODUCTION: A novel piscine acellular fish-skin graft product has 510k clearance on the US market. This product (Omega3, Kerecis, Isafjordur, Iceland) is to be used similarly to extracellular matrices (ECMs) on the market (eg, bovine and porcine) except that it contains fats, including omega-3 polyunsaturated fatty acids that have been associated with anti-inflammatory properties in many studies. While many current ECMs are effective on open wounds, studies have largely excluded application to hard-to-heal ulcers...
April 2016: Wounds: a Compendium of Clinical Research and Practice
Gavin J C Braithwaite, Michael J Daley, David Toledo-Velasquez
Hyaluronic acid of various molecular weights has been in use for the treatment of osteoarthritis knee pain for decades. Worldwide, these products are regulated as either as drugs or devices and in some countries as both. In the US, this class of products is regulated as Class III medical devices, which places specific regulatory requirements on developers of these materials under a Pre-Market Approval process, typically requiring data from prospective randomized controlled clinical studies. In 1984 pharmaceutical manufacturers became able to file an Abbreviated New Drug Application for approval of a generic drug, thus establishing standards for demonstrating equivalence to an existing chemical entity...
2016: Journal of Biomaterials Science. Polymer Edition
Basel Ramlawi, Walid K Abu Saleh, James Edgerton
A patient with atrial fibrillation (AF) has a greater than 5% annual risk of major stroke, a 5-fold increase compared to the general population. While anticoagulation remains the standard stroke prevention strategy, the nature of lifelong anticoagulation inevitably carries an increased risk of bleeding, increased stroke during periods of interruption, increased cost, and significant lifestyle modification. Many patients with atrial fibrillation have had their left atrial appendage (LAA) ligated or excised by surgeons during cardiac surgery, a decision based largely on intuition and with no clear evidence of efficacy in stroke risk reduction...
April 2015: Methodist DeBakey Cardiovascular Journal
Yoshiaki Tazawa
On July 1st, 2013, about two years after the FDA's drafting of the guidance for companion diagnostics (CoDx), the Ministry of Health, Labour, and Welfare in Japan issued an official notification regarding the co-development of CoDx with a drug which requires dedicated diagnostic tests or medical devices to predict the efficacy of or adverse reactions to the drug. Both recommend to co-develop CoDx and drugs as well as indicate the approved tests and devices on the package insert of the drug. However, since many useful predictive biomarkers may be discovered after the commercial launch of a drug, the more effective use of laboratory developed tests (LDT) should be considered in order to avoid a biomarker test lag...
April 2014: Rinsho Byori. the Japanese Journal of Clinical Pathology
William J Mosley, Michael R Smith, Matthew J Price
Left atrial appendage (LAA) occlusion or ligation is a novel approach to stroke prevention in atrial fibrillation that may obviate the need for long-term anticoagulation. The Lariat device has received Food and Drug Administration 510K clearance for the approximation of soft tissue and has been applied to transcatheter LAA ligation using a combined trans-pericardial and transseptal approach. The occurrence of late leak after transcatheter LAA ligation and its percutaneous management has not been previously reported...
March 1, 2014: Catheterization and Cardiovascular Interventions
David A Borton, Ming Yin, Juan Aceros, Arto Nurmikko
OBJECTIVE: Neural interface technology suitable for clinical translation has the potential to significantly impact the lives of amputees, spinal cord injury victims and those living with severe neuromotor disease. Such systems must be chronically safe, durable and effective. APPROACH: We have designed and implemented a neural interface microsystem, housed in a compact, subcutaneous and hermetically sealed titanium enclosure. The implanted device interfaces the brain with a 510k-approved, 100-element silicon-based microelectrode array via a custom hermetic feedthrough design...
April 2013: Journal of Neural Engineering
Robert Tarr, Dan Hsu, Zsolt Kulcsar, Christophe Bonvin, Daniel Rufenacht, Karsten Alfke, Robert Stingele, Olav Jansen, Donald Frei, Richard Bellon, Michael Madison, Tobias Struffert, Arnd Dorfler, Iris Q Grunwald, Wolfgang Reith, Anton Haass
BACKGROUND AND PURPOSE: The purpose of this study was to assess the initial post-market experience of the device and how it is compared with the Penumbra Pivotal trial used to support the 510k application. METHODS: A retrospective case review of 157 consecutive patients treated with the Penumbra system at seven international centers was performed. Primary endpoints were revascularization of the target vessel (TIMI score of 2 or 3), good functional outcome as defined by a modified Rankin scale (mRS) score of ≤2 and incidence of procedural serious adverse events...
December 2010: Journal of Neurointerventional Surgery
Michael Pinzur
No abstract text is available yet for this article.
November 2010: Foot & Ankle International
Mohit Bhandari
In a recent evaluation of 1017 device trials listed on a clinical trials register ( between 2005 and 2009, only 84 (8.2%) represented orthopedic device evaluations. These device trials notably had few numbers of patients and few centers and represented approximately 7% of drug trials on the same registry. The relatively small proportion of device trials in orthopedics may represent a lack of interest; however, given the device focus of the field, the answer is more likely to be a lack of necessity—historically, regulatory pathways to implant approvals have not required clinical trials and have largely focused on preclinical and early case-series evaluations...
2009: Journal of Long-term Effects of Medical Implants
Zoe Diana Draelos
Moisturization of the skin is important for both medical and cosmetic purposes. The development of prescription device moisturizers, receiving 510K approval on the basis of the physical reduction in transepidermal water loss, provided a new dermatologic category. This investigator-blinded research utilized a split body model in 60 subjects to examine the effect of a traditional moisturizer as compared to a prescription device moisturizer in the treatment of mild to moderate symmetrical eczema of the arms or legs...
March 2009: Journal of Cosmetic Dermatology
Nizar N Mahomed, Khalid Syed, Clement B Sledge, Troyen A Brennan, Matthew H Liang
OBJECTIVE: To evaluate the FDA's approval process and postmarket surveillance strategies for THR devices. DESIGN: The FDA Center for Devices and Radiological Health (CDRH) 510k releasable database was used to document approved THR devices. The CDRH Medical Device Reporting data files were used to study the efficiency of the FDA's post-market surveillance system. Manufacturers were contacted to supply information regarding their implants. Medline was searched between 1966-1996 to determine the percentage of THR devices with published data on clinical outcomes...
2008: Open Rheumatology Journal
Robert G Johnson
BACKGROUND CONTEXT: With the existing VSP plate using "no-cut," or low profile screws, with a 5-mm spacer on the screw, it is difficult or impossible to stack a second plate onto the existing in situ plate. In order to extend a fusion above or below, the plate must be explanted and replaced with a longer plate. PURPOSE: Situations exist where it would be advantageous to leave an existing plate in situ and couple a second plate onto the existing plate. A new device is described for in situ coupling of a plate to plate and a rod to plate using the VSP and lsola systems...
July 2006: Spine Journal: Official Journal of the North American Spine Society
Donald S Baim, Greg Braden, Richard Heuser, Jeffrey J Popma, Donald E Cutlip, Joseph M Massaro, Sachin Marulkar, Linda J Arvay, Richard E Kuntz
The Safe-Cross radiofrequency guidewire (IntraLuminal Therapeutics, Carlsbad, California) combines 3 capabilities: (1) steerability of a conventional 0.014-in intermediate-stiffness guidewire, (2) optical coherence reflectometry to warn the operator when the wire tip approaches within 1 mm of the vessel wall, and (3) delivery of radiofrequency energy pulses to the wire tip to facilitate passage through an occluded segment. The Guided Radio Frequency Energy Ablation of Total Occlusions Registry was a prospective, nonrandomized, multicenter registry that enrolled 116 patients who had long-term coronary total occlusions and in whom a >10-minute good-faith attempt to cross the occlusion using conventional guidewires had failed...
October 1, 2004: American Journal of Cardiology
R E Biagini, E F Krieg, L E Pinkerton, R G Hamilton
Receiver operating characteristics (ROC) analyses to evaluate and compare the diagnostic accuracy of Food and Drug Administration (510K)-cleared natural rubber latex (NRL)-specific immunoglobulin E (IgE) antibody immunoassays have not been performed using well-characterized skin-testing reagents. Sera were collected from 311 subjects (131 latex puncture skin test [PST] positive and 180 PST negative). All masked, coded sera were analyzed for latex-specific IgE antibodies in the Diagnostic Products Corporation microplate AlaSTAT, HYCOR HY-TEC RAST, and Pharmacia-Upjohn CAP System RAST FEIA (CAP)...
November 2001: Clinical and Diagnostic Laboratory Immunology
R G Hamilton, R E Biagini, E F Krieg
BACKGROUND: In the absence of Food and Drug Administration-approved natural rubber latex skin testing reagents, latex-specific IgE antibody immunoassays are used in the diagnosis of latex allergy. Comparative diagnostic performance of these tests has not been definitively determined. OBJECTIVE: We sought to study the predictive value of available Food and Drug Administration (510K)-cleared latex-specific IgE antibody immunoassays in the diagnosis of latex allergy...
May 1999: Journal of Allergy and Clinical Immunology
M H Wholey, J D Haller
Most physicians, and certainly the lay public, have only limited knowledge of the responsibilities and limits of the Food and Drug Administration (FDA) of the United States of America. Although laws as early as 1902 protected the public from unrestricted sale of unsafe drugs, it was not until 1976 that devices came under regulation. An obvious difference existed between regulatory control of drugs vs devices. The drug-based approach for evaluation was rejected in favor of a new system based on device class and its degrees of risk...
March 1995: Cardiovascular and Interventional Radiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"