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https://www.readbyqxmd.com/read/28343143/impact-of-rivaroxaban-on-point-of-care-assays
#1
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/28338068/a-portable-immunosensor-with-differential-pressure-gauges-readout-for-alpha-fetoprotein-detection
#2
Qingping Wang, Rongjie Li, Kang Shao, Yue Lin, Weiqiang Yang, Longhua Guo, Bin Qiu, Zhenyu Lin, Guonan Chen
A portable, affordable and simple detector is requested in a "Point-of-Care-Testing" (POCT) system. In this study, we exploited the potentialities of Differential Pressure Gauge (DPG) to the orientation of POCT technology. Alpha fetoprotein (AFP) was chosen as a model analyte that could specifically recognized by its antigen, and a tiny outfits equipped with a DPG was employed as the signal readout. Pt/SiO2 nanospheres were synthesized and modified with the detection antibody. In the presence of target, a sandwich of immunocomplex specifically formed and the Pt/SiO2 had been modified on the capture antibody...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28334841/oral-fluid-testing-for-cocaine-analytical-evaluation-of-two-point-of-collection-drug-screening-devices
#3
Juliana Nichterwitz Scherer, Taís Regina Fiorentin, Tanara Rosangela Vieira Sousa, Renata Pereira Limberger, Flavio Pechansky
The use of point-of-collection testing (POCT) devices for drugs of abuse in oral fluid (OF) is an advantageous tool that has been used for different purposes-particularly traffic enforcement. However, even with the widespread report of cocaine consumption, the reliability of POCT devices has been reported in different magnitudes. This study evaluated the reliability of two POCT devices for the detection of cocaine in OF samples of 110 cocaine users: (i) the DDS2™ (cutoff = 30 ng/mL) and (ii) the Multi-Drugs Multi-Line-Twist Screen Test Device™ (MDML) (cutoff = 20 ng/mL)...
February 27, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28334777/clinicians-interpretations-of-point-of-care-urine-culture-versus-laboratory-culture-results-analysis-from-the-four-country-poetic-trial-of-diagnosis-of-uncomplicated-urinary-tract-infection-in-primary-care
#4
Saskia Hullegie, Mandy Wootton, Theo J M Verheij, Emma Thomas-Jones, Janine Bates, Kerenza Hood, Micaela Gal, Nick A Francis, Paul Little, Michael Moore, Carl Llor, Timothy Pickles, David Gillespie, Nigel Kirby, Curt Brugman, Christopher C Butler
Background.: Urine culture at the point of care minimises delay between obtaining the sample and agar inoculation in a microbiology laboratory, and quantification and sensitivity results can be available more rapidly in primary care. Objective.: To identify the degree to which clinicians' interpretations of a point-of-care-test (POCT) urine culture (Flexicult™ SSI-Urinary Kit) agrees with laboratory culture in women presenting to primary care with symptoms of uncomplicated urinary tract infections (UTI)...
March 1, 2017: Family Practice
https://www.readbyqxmd.com/read/28306518/biochemical-testing-in-a-laboratory-tent-and-semi-intensive-care-of-ebola-patients-on-site-in-a-remote-part-of-guinea-a-paradigm-shift-based-on-a-bleach-sensitive-point-of-care-device
#5
Leonid M Irenge, Jean-Michel Dindart, Jean-Luc Gala
BACKGROUND: During the West Africa Ebola virus disease (EVD) outbreak, a Belgian laboratory was deployed for supporting the Ebola treatment unit (ETU) of N'Zerekore, Guinea. Besides diagnosis of EVD and malaria, biochemical parameters were tested and used to guide supportive treatment of EVD. METHODS: To preserve analytes stability, lithium-heparin blood samples were analyzed using the i-STAT® point-of-care testing (POCT) handheld device without the viral inactivation step...
March 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28302116/portals-design-of-an-innovative-approach-to-anticoagulation-management-through-ehealth
#6
E P W A Talboom-Kamp, N A Verdijk, I J S H Talboom, L M Harmans, M E Numans, N H Chavannes
BACKGROUND: For the monitoring of International Normalized Ratio (INR) values, venous thromboembolism (VTE) and atrial fibrillation (AF) patients can visit anticoagulation clinics, laboratories, or physicians for venous puncture. Point-of-care testing (POCT) made it possible for patients to monitor INR themselves (self-monitoring) and even self-adjust their medication dosage (self-dosage). Both skills are accepted as forms of self-management. eHealth applications can improve this self-management, resulting in better clinical outcomes...
March 16, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28299685/fabrication-of-lab-on-paper-using-porous-au-paper-electrode-application-to-tumor-marker-electrochemical-immunoassays
#7
Shenguang Ge, Yan Zhang, Mei Yan, Jiadong Huang, Jinghua Yu
A simple, low-cost, and sensitive electrochemical lab-on-paper assay is developed based on a novel gold nanoparticle modified porous paper working electrode for use in point-of-care testing (POCT). Electrochemical methods are introduced for lab-on-paper based on screen-printed paper electrodes. To further improve specificity, performance, and sensitivity for point-of-care testing, a novel porous Au-paper working electrode (Au-PWE) is designed for lab-on-paper using growth of an interconnected Au nanoparticle (NP) layer on the surface of cellulose fibers in order to enhance the conductivity of the paper sample zone and immobilize the primary antibodies (Ab1)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28281266/a-smartphone-based-colorimetric-reader-for-human-c-reactive-protein-immunoassay
#8
A G Venkatesh, Thomas van Oordt, E Marion Schneider, Roland Zengerle, Felix von Stetten, John H T Luong, Sandeep Kumar Vashist
A smartphone-based colorimetric reader (SBCR), comprising a Samsung Galaxy SIII mini, a gadget (iPAD mini, iPAD4, or iPhone 5s) and a custom-made dark hood and base holder assembly, is used for human C-reactive protein (CRP) immunoassay. A 96-well microtiter plate (MTP) is positioned on the gadget's screensaver to provide white light-based bottom illumination only in the specific regions corresponding to the well's bottom. The images captured by the smartphone's back camera are analyzed by a novel image processing algorithm...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28267667/smartphone-based-enzymatic-biosensor-for-oral-fluid-l-lactate-detection-in-one-minute-using-confined-multilayer-paper-reflectometry
#9
Donato Calabria, Cristiana Caliceti, Martina Zangheri, Mara Mirasoli, Patrizia Simoni, Aldo Roda
The development of smartphone-based biosensors for point-of-care testing (POCT) applications allows realizing "all in one" instruments, with large potential distribution among the general population. With this respect, paper color-based detection performed by reflectance measurement is the most popular, simple, inexpensive and straightforward method. Despite the large number of scientific publications related to these biosensors, they still suffer from a poor detectability and reproducibility related to inhomogeneity of color development, which leads to low assay reproducibility...
March 1, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28263739/development-of-a-paper-based-microfluidic-analytical-device-by-a-more-facile-hydrophobic-substrate-generation-strategy
#10
Yuan-Yuan Xue, Wen-Tao Zhang, Meng-Yue Zhang, Li-Zhi Liu, Wen-Xin Zhu, Ling-Zhi Yan, Jing Wang, Yan-Ru Wang, Jian-Long Wang, Dao-Hong Zhang
Microfluidic paper-based analytical devices (μPADs) have a significant potential in developing portable and disposable point-of-care testing (POCT). Herein, a facile, rapid, cost-effective and environment friendly strategy for μPADs fabrication is proposed. Specifically, the substrate paper was hydrophobized by coating with trimethoxysilane (TOS), and then the selected area was hydrophilized by treating with surfactant. The whole fabrication process was implemented within 7 min, with no need for complex pre-treatment, high-temperature and special equipment...
March 3, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28243856/predictors-of-intraoperative-testing-in-adults-undergoing-noncardiac-surgery-within-a-regional-hospital-system
#11
Jessica Spence, Michael Troncone, Steven Long, Velina Tzankova, Susan Tran, Joshua Peachey, Yannick LeManach, James Paul
BACKGROUND: The use of intraoperative testing is central to anesthesia practice, and point-of-care testing (POCT) is often used. Nevertheless, POCT is costly and its contribution to patient outcome is unknown. There is a lack of guidelines to describe which patients should undergo intraoperative testing or how results should be applied. As such, we undertook a historical cohort study evaluating intraoperative testing practices within our region where POCT is not used. METHODS: In 2012, we obtained a random sample of 1,000 adult patients undergoing noncardiac surgery in three of our health system hospitals...
February 27, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28220976/evaluation-of-a-new-hemoglobin-a1c-analyzer-for-point-of-care-testing
#12
Rui Zhou, Wei Wang, Zhi-Xin Song, Qing Tong, Qing-Tao Wang
BACKGROUND: There has been an increasing desire for the use of point-of-care testing (POCT) by both primary care clinicians and patients. This study aimed to evaluate the performance of a new POCT analyzer for hemoglobin A1c (HbA1c) testing. METHODS: We assessed the accuracy, precision, and linearity of the POCT HbA1c analyzer (A1C EZ 2.0) with the Tosoh G8 Analyzer as comparative instrument, following the Clinical and Laboratory Standards Institute (CLSI) protocols...
February 21, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28196509/point-of-care-testing-for-emergency-assessment-of-coagulation-in-patients-treated-with-direct-oral-anticoagulants
#13
Matthias Ebner, Ingvild Birschmann, Andreas Peter, Charlotte Spencer, Florian Härtig, Joachim Kuhn, Gunnar Blumenstock, Christine S Zuern, Ulf Ziemann, Sven Poli
BACKGROUND: Point-of-care testing (POCT) of coagulation has been proven to be of great value in accelerating emergency treatment. Specific POCT for direct oral anticoagulants (DOAC) is not available, but the effects of DOAC on established POCT have been described. We aimed to determine the diagnostic accuracy of Hemochron® Signature coagulation POCT to qualitatively rule out relevant concentrations of apixaban, rivaroxaban, and dabigatran in real-life patients. METHODS: We enrolled 68 patients receiving apixaban, rivaroxaban, or dabigatran and obtained blood samples at six pre-specified time points...
February 15, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28189070/paper-based-microfluidic-devices-for-electrochemical-immunofiltration-analysis-of-human-chorionic-gonadotropin
#14
Liangli Cao, Cheng Fang, Ruosheng Zeng, Xiongjie Zhao, Yuren Jiang, Zhencheng Chen
An electrochemical immunofiltration analysis was introduced into microfluidic paper-based analytical devices (μPADs) for the first time, which was based on photolithography and screen-printing technology. The hydrophilic test zones of the aldehyde-functionalized screen-printed electrodes (SPEs) were biofunctionalized with capture antibodies (Ab1). A sensitive immune detection method was developed by using primary signal antibody functionalized gold nanoparticles (GNPs/Ab2) and alkaline phosphatase conjugated secondary antibody (ALP-IgG)...
June 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28173654/-clinical-value-of-a-rapid-respiratory-syncytial-virus-antigen-detection-in-point-of-care-testing
#15
Y X Ding, R Tian, Y Qian, Y Sun, J Deng, F Wang, R N Zhu, L Q Zhao
Objective: To evaluate the clinical value of a rapid respiratory syncytial virus (RSV) antigen detection in point-of-care testing (POCT). Method: A total of 209 specimens, including 78 throat swabs (TS) and 131 nasopharyngeal aspirates (NPAs), were collected from inpatients who visited the Children's Hospital Affiliated to the Capital Institute of Pediatrics and were diagnosed as acute respiratory infection from 5 January to 7 February, 2015. These specimens were tested for RSV by a rapid antigen detection kit which was compared with reverse transcription polymerase chain reaction (RT-PCR) and direct immunofluorescence assay (DFA) for RSV detection...
February 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28166743/molecular-point-of-care-testing-for-respiratory-viruses-versus-routine-clinical-care-in-adults-with-acute-respiratory-illness-presenting-to-secondary-care-a-pragmatic-randomised-controlled-trial-protocol-respoc
#16
Nathan J Brendish, Ahalya K Malachira, Tristan W Clark
BACKGROUND: Respiratory viruses are associated with a huge socio-economic burden and are responsible for a large proportion of acute respiratory illness in hospitalised adults. Laboratory PCR is accurate but takes at least 24 h to generate a result to clinicians and antigen-based point-of-care tests (POCT) lack sensitivity. Rapid molecular platforms, such as the FilmArray Respiratory Panel, have equivalent diagnostic accuracy to laboratory PCR and can generate a result in 1 h making them deployable as POCT...
February 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28164652/validation-of-two-calprotectin-rapid-tests-in-daily-routine
#17
Christian Schulz, Thomas Wex, Ulrike von Arnim, Peter Malfertheiner
BACKGROUND: The differentiation of organic and functional intestinal diseases and monitoring of disease activity in inflammatory bowel diseases are frequent challenges in daily clinical routine. Fecal calprotectin is a noninvasive screening marker for intestinal inflammation. Its quantification by ELISA is considered to be the gold standard, but an increasing number of semiquantitative and quantitative point-of-care-tests (POCT) have been launched to optimize the duration between sample input and result...
July 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164644/evaluation-of-the-performance-of-two-point-of-care-analyzers-for-total-cholesterol-triglyceride-and-high-density-lipoprotein-cholesterol-analysis
#18
Hyunjung Kim, Yeongsic Kim, Joonhong Park, Hae-Il Park, Seungok Lee, Myungshin Kim, Yonggoo Kim, Soyoung Shin
BACKGROUND: In this study, we evaluated the analytic performance of two POCT devices and compared the results with a central laboratory method. METHODS: A total of 100 patients were enrolled in this study. LipidPro (Infopia, USA) and LandMark (Infopia, Korea), were used for measuring total cholesterol (TC), triglyceride (TG), and high density lipoprotein cholesterol (HDL-C). Imprecision and linearity were assessed and the results of two POCT analyzers were compared with a central laboratory method...
July 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164491/testing-for-soluble-st2-in-heart-failure-patients-reliability-of-a-point-of-care-method
#19
Damien Gruson, Benjamin Ferracin, Sylvie A Ahn, Michel F Rousseau
BACKGROUND: Our objective was to determine soluble ST2 (sST2) concentrations in heart failure (HF) patients with a point-of-care (POCT) assay. METHODS: sST2 levels were measured in 71 HF patients with both POCT and ELISA methods. The concentrations of sST2 were correlated to HF severity and to some established biomarkers of cardiovascular risk. RESULTS: sST2 levels measured with the ASPECT-PLUS POCT method were significantly correlated with the comparison ELISA assay (r = 0...
January 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28161128/point-of-care-testing-improves-diabetes-management-in-a-primary-care-clinic-in-south-africa
#20
Lara A Motta, Mark D S Shephard, Julie Brink, Stefan Lawson, Paul Rheeder
INTRODUCTION: Diabetes is a major health problem in South Africa. DiabCare Africa found just 47% of diabetes patients had a hemoglobin A1c (HbA1c) test for their management in the previous year. METHODS: Patients attending an urban diabetes clinic near Johannesburg, run by Project HOPE, accessed HbA1c (and urine albumin:creatinine ratio) point-of-care testing (POCT) as part of a quality-assured international program called ACE (Analytical and Clinical Excellence)...
February 1, 2017: Primary Care Diabetes
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