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https://www.readbyqxmd.com/read/28444425/pharmacogenetic-markers-to-predict-the-clinical-response-to-methotrexate-in-south-indian-tamil-patients-with-psoriasis
#1
S Indhumathi, Medha Rajappa, Laxmisha Chandrashekar, P H Ananthanarayanan, D M Thappa, V S Negi
INTRODUCTION: Despite the advent of several new systemic therapies, methotrexate remains the gold standard for the treatment of moderate to severe psoriasis. However, there exists a significant heterogeneity in individual response to methotrexate. There are no consistently reliable markers to predict methotrexate treatment response till date. OBJECTIVES: We aimed to demonstrate the association of certain genetic variants in the HLA (HLA-A2, HLA-B17, and HLA-Cw6) and the non-HLA genes including T-helper (Th)-1, Th-2, Th-17 cytokine genes (IFN-γ, IL-2, IL-4, IL-10, IL-12B, and IL-23R), and T-regulatory gene (FOXP3) with the methotrexate treatment response in South Indian Tamil patients with psoriasis...
April 25, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28431640/rapid-assessment-of-drugs-of-abuse
#2
Joesph R Wiencek, Jennifer M Colby, James H Nichols
Laboratory testing for drugs of abuse has become standard practice in many settings both forensic and clinical. Urine is the predominant specimen, but other specimens are possible including hair, nails, sweat, and oral fluid. Point-of-care test kits provide for rapid analysis at the site where specimens are collected allowing for immediate action on the results. POCT is based on immunochromatography where the drug in the patient's sample competes with drug and antibody conjugates in the test to develop or block the development of a colored line...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28421743/double-enzymes-mediated-bioluminescent-sensor-for-quantitative-and-ultra-sensitive-point-of-care-testing
#3
Yiping Chen, Yunlei Xianyu, Jing Wu, Mingling Dong, Wenshu Zheng, Jiashu Sun, Xingyu Jiang
We report an ultra-sensitive, quantitative, and rapid bioluminescent immunosensor (ABS) for point-of-care testing (POCT) of the disease biomarker in clinical samples using double enzymes including alkaline phosphatase (ALP) and luciferase. In the presence of the biomarker, the ALP attached on the surface of immnuo-nanocomplex dephosphorylates adenine triphosphate (ATP), subsequently inhibiting the ATP-luciferin-luciferase bioluminescent reaction. The highly sensitive response of ATP (pM level) allows for ultrasensitive detection of biomarker via the effective change of the bioluminescence intensity through ALP- and luciferase-catalyzed reactions, which can be quantitatively determined by a portable ATP detector...
April 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28412662/a-wireless-point-of-care-testing-system-for-the-detection-of-neuron-specific-enolase-with-microfluidic-paper-based-analytical-devices
#4
Yan Fan, Juntao Liu, Yang Wang, Jinping Luo, Huiren Xu, Shengwei Xu, Xinxia Cai
Neuron-specific enolase (NSE) had clinical significance on diagnosis, staging, monitoring effect and judging prognosis of small cell lung cancer. Thus, there had a growing demand for the on-site testing of NSE. Here, a wireless point-of-care testing (POCT) system with electrochemical measurement for NSE detection was developed and verified. The wireless POCT system consisted of microfluidic paper-based analytical devices (μPADs), electrochemical detector and Android's smartphone. Differential pulse voltammetry (DPV) measurement was adopted by means of electrochemical detector which including a potentiostat and current-to-voltage converter...
April 12, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28392741/policies-and-practices-in-haemostasis-testing-among-laboratories-in-croatia-a-survey-on-behalf-of-a-working-group-for-laboratory-coagulation-of-the-croatian-society-of-medical-biochemistry-and-laboratory-medicine
#5
Ana Bronić, Desiree Coen Herak, Sandra Margetić, Marija Milić
INTRODUCTION: The objective of this survey was to assess current policies and practice in haemostasis testing among both hospital and outpatient laboratories in Republic of Croatia. MATERIALS AND METHODS: A questionnaire with seventy questions divided into nine sections was created in May 2015. Participants were asked about their practice related to test request form, sample collection, prothrombin time (PT) and activated partial thromboplastin time assays, other individual haemostasis assays, point-of-care testing (POCT), reporting of coagulation tests results and quality assurance of procedures, the personnel and other laboratory resources, as well as on issues related to education and implementation of additional coagulation assays in their laboratory...
February 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/28392237/routine-molecular-point-of-care-testing-for-respiratory-viruses-in-adults-presenting-to-hospital-with-acute-respiratory-illness-respoc-a-pragmatic-open-label-randomised-controlled-trial
#6
Nathan J Brendish, Ahalya K Malachira, Lawrence Armstrong, Rebecca Houghton, Sandra Aitken, Esther Nyimbili, Sean Ewings, Patrick J Lillie, Tristan W Clark
BACKGROUND: Respiratory virus infection is a common cause of hospitalisation in adults. Rapid point-of-care testing (POCT) for respiratory viruses might improve clinical care by reducing unnecessary antibiotic use, shortening length of hospital stay, improving influenza detection and treatment, and rationalising isolation facility use; however, insufficient evidence exists to support its use over standard clinical care. We aimed to assess the effect of routine POCT on a broad range of clinical outcomes including antibiotic use...
April 6, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28381047/motion-correction-using-overlapped-data-correlation-based-on-a-spatial-spectral-encoded-parallel-optical-coherence-tomography
#7
Zhiyan Chen, Yi Shen, Wen Bao, Peng Li, Xiaoping Wang, Zhihua Ding
This paper presents an approach to remove motion artifacts based on a spatial-spectral encoded parallel OCT (SSE-POCT) system, where encoded rectangular illumination is employed. Motion artifacts within a B-scan are avoided due to parallel detection intrinsic to parallel OCT, while those between successive B-scans are estimated and corrected by a proposed overlapped data correlation (ODC) algorithm. To preserve axial resolution, decoded B-scan corresponding to complete spectrum is stitched from successive encoded B-scans after motion correction...
March 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28377153/clinical-performance-of-cardiac-troponin-i-a-comparison-between-the-poct-aqt90-flex-and-the-dimension-vista-analyzer-in-an-emergency-setting
#8
Monica Maria Mion, Giada Bragato, Alessandra Casarotti, Chiara Cosma, Stefania Vigolo, Gianna Vettore, Franco Tosato, Martina Zaninotto, Mario Plebani
BACKGROUND: Cardiac troponin [cTn (I or T)] is the preferred biomarker for the diagnosis of myocardial infarction (MI). AIM: We studied the analytical performance of the POCT AQT90 FLEX cTnI assay and its diagnostic accuracy, in comparison to the Dimension Vista cTnI method, in patients presenting to the Emergency Department (ED) with suspect of acute coronary syndrome (ACS). METHODS: 786 consecutive patients were enrolled. cTnI was measured at admission to the ED and about 3 and 6 hours later...
April 1, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28374509/point-of-care-tests-for-infectious-diseases-barriers-to-implementation-across-three-london-teaching-hospitals
#9
Amaya L Bustinduy, Dakshika Jeyaratnam, Sam Douthwaite, Sarah Tonkin-Crine, Rebecca Shaw, Laura Hyrapetian, Nick Sevdalis, Simon Goldenberg, Elizabeth Adams, Mike Sharland
Existing Point-of-care tests (POCT) to help identify infection-related causes of illness can complement diagnostic and disposition decisions in children attending emergency departments.(1) Evidence-based clinical algorithms can integrate such POCT to aid in the admission and discharge decision process. Paediatric studies validating these tools are scarce, with very few studies conducted in UK centres.(2-5) POCT can be based on host infection markers (e.g. finger prick tests for C-reactive protein (CRP) to help decide if the patient has a bacterial or viral infection) or pathogen detection tests (e...
April 4, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28371852/improvement-in-the-quality-of-hba1c-determination-by-using-commutable-specimens-with-ifcc-assigned-values
#10
Rui Zhou, Zhi-Qi Gao, Qing Tong, Chang Zuo, Zhi-Xin Song, Wei Wang, Qing-Tao Wang
Background: To assess the usefulness of commutable secondary reference materials with International Federation of Clinical Chemistry (IFCC)-assigned values, for improving the quality of hemoglobin A1c (HbA 1c ) determination. Methods: We recalibrated and evaluated 3 point-of-care-test (POCT) devices via 3 different method-specific central laboratory analyzers that were calibrated using commutable specimens with IFCC-assigned values. The staff members who performed POCT were also evaluated before and after training...
March 21, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/28369370/diagnostic-performance-and-clinical-feasibility-of-a-point-of-care-test-for-respiratory-viral-infections-in-primary-health-care
#11
Andrea H L Bruning, Wilhelmina B de Kruijf, Henk C P M van Weert, Wim L M Willems, Menno D de Jong, Dasja Pajkrt, Katja C Wolthers
Background.: Inappropriately high levels of antibiotics are still prescribed in primary health care for respiratory tract infections (RTIs). Access to diagnostic point-of-care tests (POCTs) for RTIs might reduce this over-prescription. Objective.: The purpose of our study was to determine the diagnostic performance and clinical feasibility of a recently developed diagnostic POCT for respiratory viruses, the mariPOC®, in a Dutch primary healthcare setting. Methods...
March 24, 2017: Family Practice
https://www.readbyqxmd.com/read/28359132/point-of-care-testing-in-liver-disease-and-liver-surgery
#12
Lasitha Abeysundara, Susan V Mallett, Ben Clevenger
The alterations in coagulation and hemostasis that accompany liver disease are complex, and while patients with this disease have traditionally been perceived as having a bleeding diathesis, it is now understood that in stable patients hemostasis is "re-balanced." Hepatic surgery, and particularly liver transplantation, can be associated with large fluid shifts, massive bleeding, and coagulopathy, as well as postoperative thrombosis. Point-of-care tests (POCTs) of coagulation facilitate goal-directed treatments and hemostatic monitoring in dynamic environments where the coagulation status can alter rapidly and often unpredictably...
March 30, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28351016/nano-enabled-paper-humidity-sensor-for-mobile-based-point-of-care-lung-function-monitoring
#13
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/28350534/evaluation-of-a-poct-device-for-c-reactive-protein-hematocrit-and-leukocyte-differential
#14
Albert J de Graaf, Sietske W Hiemstra, Evelien W M Kemna, Johannes G Krabbe
No abstract text is available yet for this article.
March 28, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28343143/impact-of-rivaroxaban-on-point-of-care-assays
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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