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https://www.readbyqxmd.com/read/28351016/nano-enabled-paper-humidity-sensor-for-mobile-based-point-of-care-lung-function-monitoring
#1
Mitradip Bhattacharjee, Harshal B Nemade, Dipankar Bandyopadhyay
The frequency of breathing and peak flow rate of exhaled air are necessary parameters to detect chronic obstructive pulmonary diseases (COPDs) such as asthma, bronchitis, or pneumonia. We developed a lung function monitoring point-of-care-testing device (LFM-POCT) consisting of mouthpiece, paper-based humidity sensor, micro-heater, and real-time monitoring unit. Fabrication of a mouthpiece of optimal length ensured that the exhaled air was focused on the humidity-sensor. The resistive relative humidity sensor was developed using a filter paper coated with nanoparticles, which could easily follow the frequency and peak flow rate of the human breathing...
March 22, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28350870/bacterial-clonal-diagnostics-as-a-tool-for-evidence-based-empiric-antibiotic-selection
#2
Veronika Tchesnokova, Hovhannes Avagyan, Elena Rechkina, Diana Chan, Mariya Muradova, Helen Ghirmai Haile, Matthew Radey, Scott Weissman, Kim Riddell, Delia Scholes, James R Johnson, Evgeni V Sokurenko
Despite the known clonal distribution of antibiotic resistance in many bacteria, empiric (pre-culture) antibiotic selection still relies heavily on species-level cumulative antibiograms, resulting in overuse of broad-spectrum agents and excessive antibiotic/pathogen mismatch. Urinary tract infections (UTIs), which account for a large share of antibiotic use, are caused predominantly by Escherichia coli, a highly clonal pathogen. In an observational clinical cohort study of urgent care patients with suspected UTI, we assessed the potential for E...
2017: PloS One
https://www.readbyqxmd.com/read/28350811/sampling-and-detection-of-airborne-influenza-virus-towards-point-of-care-applications
#3
Laila Ladhani, Gaspard Pardon, Hanne Meeuws, Liesbeth van Wesenbeeck, Kristiane Schmidt, Lieven Stuyver, Wouter van der Wijngaart
Airborne transmission of the influenza virus contributes significantly to the spread of this infectious pathogen, particularly over large distances when carried by aerosol droplets with long survival times. Efficient sampling of virus-loaded aerosol in combination with a low limit of detection of the collected virus could enable rapid and early detection of airborne influenza virus at the point-of-care setting. Here, we demonstrate a successful sampling and detection of airborne influenza virus using a system specifically developed for such applications...
2017: PloS One
https://www.readbyqxmd.com/read/28350554/high-sensitivity-and-specificity-of-the-cepheid-xpert%C3%A2-hiv-1-qualitative-point-of-care-test-among-newborns-in-botswana
#4
Maryanne Ibrahim, Sikhulile Moyo, Terence Mohammed, Lucy Mupfumi, Simani Gaseitsiwe, Kenneth Maswabi, Gbolahan Ajibola, Rebecca Gelman, Oganne Batlang, Maureen Sakoi, Chloe Auletta-Young, Joseph Makhema, Shahin Lockman, Roger L Shapiro
BACKGROUND: HIV point-of-care (POC) testing allows for early infant HIV diagnosis and treatment, but POC accuracy at birth and in the setting of antiretroviral prophylaxis for the prevention of mother-to-child HIV transmission (MTCT) is unknown. METHODS: We evaluated the Cepheid Xpert® HIV-1 Qual POC test against the Roche Taqman HIV-1 PCR platform using dried blood spots from 15 HIV-infected and 75 HIV-exposed uninfected newborns. These infants were screened for HIV at <96 hours of life at 5 hospital maternity wards in Botswana; all infants received post-exposure antiretroviral prophylaxis (PEP) and most mothers received 3-drug antiretroviral therapy in pregnancy and at delivery...
March 24, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28346965/point-of-care-coagulation-tests-monitoring-of-direct-oral-anticoagulants-and-their-reversal-therapy-state-of-the-art
#5
Giacomo E Iapichino, Paolo Bianchi, Marco Ranucci, Ekaterina Baryshnikova
Direct oral anticoagulants (DOACs) exert similar anticoagulant effects to vitamin K antagonists and are increasingly used worldwide. Nevertheless, an evidence-based approach to patients receiving DOACs when any unplanned urgent surgery or bleeding (either spontaneous or traumatic) occurs is still missing. In this review, we investigate the role of point-of-care coagulation tests when other, more specific tests are not available. Indeed, thromboelastography and activated clotting time can detect dabigatran-induced coagulopathy, while their accuracy is limited for apixaban and rivaroxaban, mostly in cases of low drug plasma concentrations...
March 27, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28346963/point-of-care-testing-in-neurosurgery
#6
Christopher Beynon, Lars Wessels, Andreas W Unterberg
Coagulation disorders can have a major impact on the outcome of neurosurgical patients. The central nervous system is located within the closed space of the skull, and therefore, intracranial hemorrhage can lead to intracranial hypertension. Acute brain injury has been associated with alterations of various hemostatic parameters. Point-of-care (POC) techniques such as rotational thromboelastometry are able to identify markers of coagulopathy which are not reflected by standard assessment of hemostasis (e.g...
March 27, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28346946/association-between-a-virtual-glucose-management-service-and-glycemic-control-in-hospitalized-adult-patients-an-observational-study
#7
Robert J Rushakoff, Mary M Sullivan, Heidemarie Windham MacMaster, Arti D Shah, Alvin Rajkomar, David V Glidden, Michael A Kohn
Background: Inpatient hyperglycemia is common and is linked to adverse patient outcomes. New methods to improve glycemic control are needed. Objective: To determine whether a virtual glucose management service (vGMS) is associated with improved inpatient glycemic control. Design: Cross-sectional analyses of three 12-month periods (pre-vGMS, transition, and vGMS) between 1 June 2012 and 31 May 2015. Setting: 3 University of California, San Francisco, hospitals...
March 28, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28346669/evaluation-of-a-point-of-care-electrochemical-meter-to-detect-subclinical-ketosis-and-hypoglycaemia-in-lactating-dairy-cows
#8
A Zakian, M Tehrani-Sharif, M R Mokhber-Dezfouli, M Nouri, P D Constable
OBJECTIVES: To evaluate and validate a hand-held electrochemical meter (Precision Xtra®) as a screening test for subclinical ketosis and hypoglycaemia in lactating dairy cattle. DESIGN: Method comparison study using a convenience sample. PROCEDURE: Blood samples were collected into plain tubes from the coccygeal vessels of 181 Holstein cows at 2-4 weeks of lactation during summer in Iran. Blood β-hydroxybutyrate concentration (BHB) and glucose concentration were immediately measured by the electrochemical meter after applying 20 μL of blood to the reagent strip...
April 2017: Australian Veterinary Journal
https://www.readbyqxmd.com/read/28346363/rapid-and-low-cost-crp-measurement-by-integrating-a-paper-based-microfluidic-immunoassay-with-smartphone-crp-chip
#9
Meili Dong, Jiandong Wu, Zimin Ma, Hagit Peretz-Soroka, Michael Zhang, Paul Komenda, Navdeep Tangri, Yong Liu, Claudio Rigatto, Francis Lin
Traditional diagnostic tests for chronic diseases are expensive and require a specialized laboratory, therefore limiting their use for point-of-care (PoC) testing. To address this gap, we developed a method for rapid and low-cost C-reactive protein (CRP) detection from blood by integrating a paper-based microfluidic immunoassay with a smartphone (CRP-Chip). We chose CRP for this initial development because it is a strong biomarker of prognosis in chronic heart and kidney disease. The microfluidic immunoassay is realized by lateral flow and gold nanoparticle-based colorimetric detection of the target protein...
March 26, 2017: Sensors
https://www.readbyqxmd.com/read/28346350/fast-and-selective-plasmonic-serotonin-detection-with-aptamer-gold-nanoparticle-conjugates
#10
Jorge L Chávez, Joshua A Hagen, Nancy Kelley-Loughnane
Neurotransmitters detection is critical to understanding communication between the brain and peripheral tissue. Serotonin is a key neurotransmitter linked to a number of conditions, but a full understanding of its role in disease is still lacking. The development of fast and selective serotonin detection platforms will provide researchers with tools to monitor serotonin in individuals before and after treatment for the condition of interest. Aptamer-gold nanoparticles conjugates that responded colorimetrically to serotonin with minimal response to its metabolite and other neurotransmitters were designed by simply adsorbing the DNA on the surface of AuNPs...
March 25, 2017: Sensors
https://www.readbyqxmd.com/read/28345187/novel-biomarkers-for-prostate-cancer-an-evidence-based-review-for-use-in-clinical-practice
#11
REVIEW
Vikram M Narayan, Badrinath R Konety, Christopher Warlick
Prostate cancer is a heterogeneous disease with disparate outcomes. Traditional clinical parameters are limited in their ability to differentiate between these cases, and there is uncertainty regarding management strategies. A number of novel biomarkers have emerged, but how best to use them at the point of care remains confusing. In the present review, we describe the most common novel biomarkers, their key supporting literature, and propose a meaningful algorithm for their use in clinical practice. To identify commercially available prostate cancer diagnostic tests, we carried out a PubMed literature search (through May 2016)...
March 27, 2017: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/28345030/wearable-disposable-sweat-based-glucose-monitoring-device-with-multistage-transdermal-drug-delivery-module
#12
Hyunjae Lee, Changyeong Song, Yong Seok Hong, Min Sung Kim, Hye Rim Cho, Taegyu Kang, Kwangsoo Shin, Seung Hong Choi, Taeghwan Hyeon, Dae-Hyeong Kim
Electrochemical analysis of sweat using soft bioelectronics on human skin provides a new route for noninvasive glucose monitoring without painful blood collection. However, sweat-based glucose sensing still faces many challenges, such as difficulty in sweat collection, activity variation of glucose oxidase due to lactic acid secretion and ambient temperature changes, and delamination of the enzyme when exposed to mechanical friction and skin deformation. Precise point-of-care therapy in response to the measured glucose levels is still very challenging...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28345028/self-powered-integrated-microfluidic-point-of-care-low-cost-enabling-simple-chip
#13
Erh-Chia Yeh, Chi-Cheng Fu, Lucy Hu, Rohan Thakur, Jeffrey Feng, Luke P Lee
Portable, low-cost, and quantitative nucleic acid detection is desirable for point-of-care diagnostics; however, current polymerase chain reaction testing often requires time-consuming multiple steps and costly equipment. We report an integrated microfluidic diagnostic device capable of on-site quantitative nucleic acid detection directly from the blood without separate sample preparation steps. First, we prepatterned the amplification initiator [magnesium acetate (MgOAc)] on the chip to enable digital nucleic acid amplification...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28344693/point-of-care-ultrasound-as-a-competency-for-general-internists-a-survey-of-internal-medicine-training-programs-in-canada
#14
Jonathan Ailon, Ophyr Mourad, Maral Nadjafi, Rodrigo Cavalcanti
BACKGROUND: Point-of-care ultrasound (POCUS) is increasingly used on General Internal Medicine (GIM) inpatient services, creating a need for defined competencies and formalized training. We evaluated the extent of training in POCUS and the clinical use of POCUS among Canadian GIM residency programs. METHOD: Internal Medicine trainees and GIM Faculty at the University of Toronto were surveyed on their clinical use of POCUS and the extent of their training. We separately surveyed Canadian IM Program Directors and Division Directors on the extent of POCUS training in their programs, barriers in the implementation of POCUS curricula, and recommendations for POCUS competencies in IM...
October 2016: Canadian Medical Education Journal
https://www.readbyqxmd.com/read/28343420/portable-devices-and-mobile-instruments-for-infectious-diseases-point-of-care-testing
#15
Luc Bissonnette, Michel G Bergeron
Rapidity, simplicity, and portability are highly desirable characteristics of tests and devices designed for performing diagnostics at the point of care (POC), either near patients managed in healthcare facilities or to offer bioanalytical alternatives in external settings. By reducing the turnaround time of the diagnostic cycle, POC diagnostics can reduce the dissemination, morbidity, and mortality of infectious diseases and provide tools to control the global threat of antimicrobial resistance. Areas covered: A literature search of PubMed and Google Scholar, and extensive mining of specialized publications, Internet resources, and manufacturers' websites have been used to organize and write this overview of the challenges and requirements associated with the development of portable sample-to-answer diagnostics, and showcase relevant examples of handheld devices, portable instruments, and less mobile systems which may or could be operated at POC...
March 27, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28343143/impact-of-rivaroxaban-on-point-of-care-assays
#16
Pierre Fontana, Lorenzo Alberio, Anne Angelillo-Scherrer, Lars M Asmis, Wolfgang Korte, Adriana Mendez, Pirmin Schmid, Hans Stricker, Jan-Dirk Studt, Dimitrios A Tsakiris, Walter A Wuillemin, Michael Nagler
BACKGROUND: Point-of-care testing (POCT) is regularly used to assess haemostasis in various clinical settings. The impact of rivaroxaban on those POCT is still elusive. We aimed to study the effects of rivaroxaban on most commonly used POCT assays. METHODS: Blood samples were taken before, 3h, and 24h after administration of 20mg rivaroxaban to 20 healthy volunteers as part of a prospective, multicenter validation study (clinicaltrials.govNCT01710267). Blood samples were analysed with thromboelastometry (ROTEM®), two platelet function assays (INNOVANCE® PFA-200 and Multiplate®), and the CoaguChek® XS...
March 21, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28343104/localized-surface-plasmon-resonance-mediated-fluorescence-signals-in-plasmonic-nanoparticle-quantum-dot-hybrids-for-ultrasensitive-zika-virus-rna-detection-via-hairpin-hybridization-assays
#17
Oluwasesan Adegoke, Masahiro Morita, Tatsuya Kato, Masahito Ito, Tetsuro Suzuki, Enoch Y Park
The current epidemic caused by the Zika virus (ZIKV) and the devastating effects of this virus on fetal development, which result in an increased incidence of congenital microcephaly symptoms, have prompted the World Health Organization (WHO) to declare the ZIKV a public health issue of global concern. Efficient probes that offer high detection sensitivity and specificity are urgently required to aid in the point-of-care treatment of the virus. In this study, we show that localized surface plasmon resonance (LSPR) signals from plasmonic nanoparticles (NPs) can be used to mediate the fluorescence signal from semiconductor quantum dot (Qdot) nanocrystals in a molecular beacon (MB) biosensor probe for ZIKV RNA detection...
March 22, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28342574/ultrasound-findings-in-tension-pneumothorax-a-case-report
#18
Maxine Inocencio, Jeannine Childs, Mikaela L Chilstrom, Kristin Berona
BACKGROUND: Delayed recognition of tension pneumothorax can lead to a mortality of 31% to 91%. However, the classic physical examination findings of tracheal deviation and distended neck veins are poorly sensitive in the diagnosis of tension pneumothorax. Point-of-care ultrasound is accurate in identifying the presence of pneumothorax, but sonographic findings of tension pneumothorax are less well described. CASE REPORT: We report the case of a 21-year-old man with sudden-onset left-sided chest pain...
March 22, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28342571/identification-of-gastric-outlet-obstruction-using-point-of-care-ultrasound
#19
Michael Gottlieb, Damali Nakitende
No abstract text is available yet for this article.
March 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28342196/a-dna-logic-gate-automaton-for-detection-of-rabies-and-other-lyssaviruses
#20
Pavithra Vijayakumar, Joanne Macdonald
Immediate activation of biosensors is not always desirable, particularly if activation is due to non-specific interactions. Here we demonstrate the use of deoxyribozyme-based logic gate networks arranged into visual displays to precisely control activation of biosensors, and demonstrate a prototype molecular automaton able to discriminate between seven different genotypes of Lyssaviruses, including Rabies virus. The device uses novel mixed-base logic gates to enable detection of the large diversity of Lyssavirus sequence populations, while a NOT logic gate prevents non-specific activation across genotypes...
March 25, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
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