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https://www.readbyqxmd.com/read/28319898/immunodetection-of-salivary-biomarkers-by-an-optical-microfluidic-biosensor-with-polyethylenimine-modified-polythiophene-c70-organic-photodetectors
#1
Tao Dong, Nuno Miguel Matos Pires
This work reports a novel optical microfluidic biosensor with highly sensitive organic photodetectors (OPDs) for absorbance-based detection of salivary protein biomarkers at the point of care. The compact and miniaturized biosensor has comprised OPDs made of polythiophene-C70 bulk heterojunction for the photoactive layer; whilst a calcium-free cathode interfacial layer, made of linear polyethylenimine, was incorporated to the photodetectors to enhance the low cost. The OPDs realized onto a glass chip were aligned to antibody-functionalized chambers of a poly(methyl methacrylate) microfluidic chip, in where immunogold-silver assays were conducted...
March 6, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28319242/quality-of-cancer-surveillance-clinical-practice-guidelines-specificity-and-consistency-of-recommendations
#2
Ryan P Merkow, Deborah Korenstein, Rubaya Yeahia, Peter B Bach, Shrujal S Baxi
Importance: Primary care clinicians, who are increasingly responsible for caring for the growing population of cancer survivors, may be unfamiliar with appropriate cancer surveillance strategies. Clinical practice guidelines can inform cancer follow-up care and surveillance testing. Vague recommendations and inconsistencies among guidelines can lead to overuse and underuse of health care resources and have a negative impact on cost and quality of survivorship care. Objective: To examine the specificity and consistency of recommendations for surveillance after active treatment across cancer guidelines...
March 20, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28317400/nanodiagnostics-for-tuberculosis-detection
#3
Hesham El-Samadony, Asma Althani, Mohamed Awad Tageldin, Hassan M E Azzazy
Introduction Tuberculosis (TB) is a leading killer worldwide. End TB strategy aims at ending the TB epidemic by 2030. Early, accurate, and affordable diagnosis represents a cornerstone to achieve this goal. Innovative strategies for TB diagnostics have been introduced, however the ideal assay is yet unavailable and conventional methods remain necessary for diagnosis. Unique properties of nanoparticles (NPs) have allowed their utilization in TB detection via targeting disease biomarkers. Area Covered Until now, around thirty-five TB NP-based assays have been partially or fully characterized...
March 20, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28315124/multi-modality-imaging-assessment-of-pericardial-masses
#4
REVIEW
Wunan Zhou, Monvadi Barbara Srichai
PURPOSE OF REVIEW: This review will discuss the application of various imaging modalities including their advantages and disadvantages in the evaluation of the most common pericardial masses with a focus on pericardial cysts, tumors, and hematomas. RECENT FINDINGS: Accurate identification of pericardial masses and assessment of potential hemodynamic compromise is imperative for management. Cardiac imaging plays a central role in tissue characterization as well as evaluation of extension into neighboring structures...
April 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28306597/diagnosis-of-viral-hepatitis
#5
Philippa J Easterbrook, Teri Roberts, Anita Sands, Rosanna Peeling
PURPOSE OF REVIEW: Chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infections and HIV-HBV and HCV coinfection are major causes of chronic liver disease worldwide. Testing and diagnosis is the gateway for access to both treatment and prevention services, but there remains a large burden of undiagnosed infection globally. We review the global epidemiology, key challenges in the current hepatitis testing response, new tools to support the hepatitis global response (2016-2020 Global Hepatitis Health Sector strategy, and 2017 WHO guidelines on hepatitis testing and their key recommendations) and future directions and innovations in hepatitis diagnostics...
March 16, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28304241/wireless-teleophthalmology-a-novel-low-cost-flexible-network-architecture-and-its-performance-evaluation-for-remote-eye-care-solutions
#6
Shashwat Pathak, Basant Kumar
INTRODUCTION: This article proposes a novel, cost-effective, flexible, and easy-to-deploy wireless teleophthalmology network architecture and performance evaluation for its potential use in remote areas. This study has used practical telecommunication standards, which is widely deployed throughout India. METHODS: In the proposed scenario, patient's eye images are obtained using a specified imaging modality, and then sent to a server at the primary eye care centre (PECC) using ZigBee a short-range wireless network...
March 17, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28303708/the-assessment-of-the-ionizing-radiation-dose-received-by-patients-during-some-diagnostic-x-ray-examinations-carried-out-on-the-basis-of-the-working-procedures-in-the-health-care-entities
#7
Marcin Bekas, Elżbieta Waśniewska, Adam Wardziński, Kamil Wieprzowski
Background: X-ray examination is a popular and universally used injury and disease diagnostic method. A distinctive X ray examination feature is that it can be done quickly which is extremely important in case of the need for rapid diagnosis of patients in life threatening condition. Another advantage of the X-ray examinations is also relatively low cost of carry. However, X-ray examination involve adverse health effects. During the examination the patient is subjected to ionizing radiation that might have impact on his health...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28302164/cost-effectiveness-of-cerebrospinal-biomarkers-for-the-diagnosis-of-alzheimer-s-disease
#8
Spencer A W Lee, Luciano A Sposato, Vladimir Hachinski, Lauren E Cipriano
BACKGROUND: Accurate and timely diagnosis of Alzheimer's disease (AD) is important for prompt initiation of treatment in patients with AD and to avoid inappropriate treatment of patients with false-positive diagnoses. METHODS: Using a Markov model, we estimated the lifetime costs and quality-adjusted life-years (QALYs) of cerebrospinal fluid biomarker analysis in a cohort of patients referred to a neurologist or memory clinic with suspected AD who remained without a definitive diagnosis of AD or another condition after neuroimaging...
March 16, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28301778/risk-stratified-versus-non-risk-stratified-diagnostic-testing-for-management-of-suspected-acute-biliary-obstruction-comparative-effectiveness-costs-and-the-role-of-mr-cholangiopancreatography
#9
Stella K Kang, David Hoffman, Bart Ferket, Michelle I Kim, R Scott Braithwaite
Purpose To analyze the cost effectiveness of the American Society for Gastrointestinal Endoscopy (ASGE) risk stratification guidelines versus magnetic resonance (MR) cholangiopancreatography-based treatment of patients with possible choledocholithiasis. Materials and Methods A decision-analytic model was constructed to compare cost and effectiveness of three diagnostic strategies for gallstone disease with possible choledocholithiasis: noncontrast MR cholangiopancreatography, contrast material-enhanced MR imaging/MR cholangiopancreatography, and ASGE risk stratification guidelines for diagnostic evaluation recommending endoscopy (high risk), MR cholangiopancreatography (intermediate risk), or no test (low risk)...
March 16, 2017: Radiology
https://www.readbyqxmd.com/read/28297296/development-of-a-universal-medical-x-ray-imaging-phantom-prototype
#10
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 projection 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 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295098/optofluidic-biomolecule-sensors-based-on-a-si-h-microrings-embedded-in-silicon-glass-microchannels
#11
T Lipka, L Moldenhauer, L Wahn, H K Trieu
The large-scale and low-cost fabrication of high sensitivity sensors for the real-time detection of biochemicals and molecular substances opens up new opportunities in the areas of bioanalytic screening and medical diagnostics. Planar integrated photonic resonators that can be fabricated with a low footprint, in spatial and wavelength multiplexed arrangements, and that enable integration with microfluidics on the wafer scale have emerged as a promising sensing platform for these application fields. We realized an optofluidic and label-free biosensor that is based on hydrogenated amorphous silicon microring resonators embedded in silicon/glass microfluidic channels for analyte injection and biomolecule immobilization...
March 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28291722/effectiveness-of-interventions-for-diagnosis-and-treatment-of-tuberculosis-in-hard-to-reach-populations-in-countries-of-low-and-medium-tuberculosis-incidence-a-systematic-review
#12
REVIEW
Charlotte C Heuvelings, Sophia G de Vries, Patrick F Greve, Benjamin J Visser, Sabine Bélard, Saskia Janssen, Anne L Cremers, René Spijker, Beth Shaw, Ruaraidh A Hill, Alimuddin Zumla, Andreas Sandgren, Marieke J van der Werf, Martin P Grobusch
Tuberculosis is over-represented in hard-to-reach (underserved) populations in high-income countries of low tuberculosis incidence. The mainstay of tuberculosis care is early detection of active tuberculosis (case finding), contact tracing, and treatment completion. We did a systematic review with a scoping component of relevant studies published between 1990 and 2015 to update and extend previous National Institute for Health and Care Excellence (NICE) reviews on the effectiveness of interventions for identifying and managing tuberculosis in hard-to-reach populations...
March 10, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28290647/syncope-evaluation-and-differential-diagnosis
#13
Lloyd A Runser, Robert L Gauer, Alex Houser
Syncope is an abrupt and transient loss of consciousness caused by cerebral hypoperfusion. It accounts for 1% to 1.5% of emergency department visits, resulting in high hospital admission rates and significant medical costs. Syncope is classified as neurally mediated, cardiac, and orthostatic hypotension. Neurally mediated syncope is the most common type and has a benign course, whereas cardiac syncope is associated with increased morbidity and mortality. Patients with presyncope have similar prognoses to those with syncope and should undergo a similar evaluation...
March 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/28286834/thoracic-injury-rule-out-criteria-in-prediction-of-traumatic-intra-thoracic-injuries-a-validation-study
#14
Setareh Asgarzadeh, Bahareh Feizi, Farhad Sarabandi, Morteza Asgarzadeh
INTRODUCTION: Doing Chest X Ray (CXR) for all trauma patients is not efficient and cost effective due to its low diagnostic value. The present study was designed aiming to evaluate the diagnostic accuracy of thoracic injury rule out criteria (TIRC) in prediction of traumatic intra-thoracic injuries and need for CXR. METHOD: The present study is a prospective cross-sectional study that has been carried out to evaluate the accuracy of TIRC model in screening blunt multiple trauma patients in need of CXR for ruling out intra-thoracic injuries...
2017: Emergency (Tehran, Iran)
https://www.readbyqxmd.com/read/28286195/-diagnostic-accuracy-of-non-invasive-fibrosis-scores-in-a-population-of-individuals-with-a-low-prevalence-of-fibrosis
#15
Suzanne E Mahady, Petra Macaskill, Jonathan C Craig, Grace Lh Wong, Winnie Cw Chu, Henry Ly Chan, Jacob George, Vincent Ws Wong
BACKGROUND & AIMS: Non-invasive scoring systems for fibrosis are increasingly used in the clinic and in research because of their ease of use, accessibility, and low cost. However, test performance characteristics were established in groups of patients with a high prevalence of advanced fibrosis; little is known about diagnostic accuracy in low-risk populations. DESIGN: In a cross-sectional study, 922 members of a general ambulatory population in Hong Kong (randomly selected; 18-70 years old) underwent clinical assessment from May 2008 through December 2010...
March 7, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28285419/evaluation-of-promotional-materials-to-promote-low-dose-computed-tomography-ldct-screening-to-high-risk-consumers-and-health-care-providers
#16
Janella N Hudson, Gwendolyn P Quinn, Lauren E Wilson, Vani N Simmons
Low-dose computed tomography (LDCT) screening is a promising screening modality for increasing the detection rate of early stage lung cancers among high-risk individuals. Despite being recommended by the US Preventative Services Task Force, uptake of LDCT remains low. The objective of the current study was to gather feedback from high-risk consumers and health care providers on LDCT promotional materials. Focus group discussions were conducted with high-risk individuals (8 focus groups; N = 38) and primary care providers (9 focus groups; N = 23)...
March 11, 2017: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/28284778/detection-of-aberrant-tert-promoter-methylation-by-combined-bisulfite-restriction-enzyme-analysis-for-cancer-diagnosis
#17
Seungjae Lee, Sumit Borah, Armita Bahrami
Aberrant CpG dinucleotide methylation in a specific region of the telomerase reverse transcriptase (TERT) promoter is associated with increased TERT mRNA levels and malignancy in several cancer types. However, routine screening of this region to aid cancer diagnosis can be challenging because i) several established methylation assays may inaccurately report on hypermethylation of this particular region, ii) interpreting the results of methylation assays can sometimes be difficult for clinical laboratories, and iii) use of high-throughput methylation assays for a few patient samples can be cost prohibitive...
March 8, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28284077/multiplex-detection-of-extensively-drug-resistant-tuberculosis-using-binary-deoxyribozyme-sensors
#18
Hillary N Bengtson, Susanne Homolka, Stefan Niemann, Ana Júlia Reis, Pedro Eduardo da Silva, Yulia V Gerasimova, Dmitry M Kolpashchikov, Kyle H Rohde
Current diagnostic tools for Mycobacterium tuberculosis (Mtb) have many disadvantages including low sensitivity, slow turnaround times, or high cost. Accurate, easy to use, and inexpensive point of care molecular diagnostic tests are urgently needed for the analysis of multidrug resistant (MDR) and extensively drug resistant (XDR) Mtb strains that emerge globally as a public health threat. In this study, we established proof-of-concept for a novel diagnostic platform (TB-DzT) for Mtb detection and the identification of drug resistant mutants using binary deoxyribozyme sensors (BiDz)...
March 1, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28281264/resonance-energy-transfer-based-nucleic-acid-hybridization-assays-on-paper-based-platforms-using-emissive-nanoparticles-as-donors
#19
Samer Doughan, M Omair Noor, Yi Han, Ulrich J Krull
Quantum dots (QDs) and upconverting nanoparticles (UCNPs) are luminescent nanoparticles (NPs) commonly used in bioassays and biosensors as resonance energy transfer (RET) donors. The narrow and tunable emissions of both QDs and UCNPs make them versatile RET donors that can be paired with a wide range of acceptors. Ratiometric signal processing that compares donor and acceptor emission in RET-based transduction offers improved precision, as it accounts for fluctuations in the absolute photoluminescence (PL) intensities of the donor and acceptor that can result from experimental and instrumental variations...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28281262/streak-imaging-flow-cytometer-for-rare-cell-analysis
#20
Joshua Balsam, Hugh Alan Bruck, Miguel Ossandon, Ben Prickril, Avraham Rasooly
There is a need for simple and affordable techniques for cytology for clinical applications, especially for point-of-care (POC) medical diagnostics in resource-poor settings. However, this often requires adapting expensive and complex laboratory-based techniques that often require significant power and are too massive to transport easily. One such technique is flow cytometry, which has great potential for modification due to the simplicity of the principle of optical tracking of cells. However, it is limited in that regard due to the flow focusing technique used to isolate cells for optical detection...
2017: Methods in Molecular Biology
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