keyword
MENU ▼
Read by QxMD icon Read
search

Preanalytical

keyword
https://www.readbyqxmd.com/read/28647065/preanalytic-process-linked-to-spuriously-elevated-hiv-viral-loads-improvement-on-an-fda-approved-process
#1
Gary W Procop, Alan J Taege, Colleen Starkey, Marisa Tungsiripat, Diane Warner, Jesse D Schold, Belinda Yen-Lieberman
The processing of specimens often occurs in a central processing area within laboratories. We demonstrated that plasma centrifuged in the central laboratory but allowed to remain within the primary tube following centrifugation was associated with spuriously elevated HIV viral loads compared with recentrifugation of the plasma just prior to testing.
September 14, 2016: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28643538/do-methodological-differences-account-for-the-current-controversy-on-tissue-factor-expression-in-platelets
#2
Marta Brambilla, Laura Rossetti, Chiara Zara, Paola Canzano, Peter L A Giesen, Elena Tremoli, Marina Camera
Tissue factor (TF), the key activator of the blood coagulation cascade and of thrombus formation, is also expressed by circulating human platelets. Despite the documented in-depth characterization of platelet TF carried out in the past 15 years, some authors still fail to identify TF in platelets, especially when assessment in platelet-rich plasma (PRP) or washed platelets is carried out. This study aims to extend the characterization of the subset of TF-positive platelets in PRP from healthy subjects and to verify how different centrifugation forces, used to prepare the PRP, could affect the analysis of TF-positive platelets...
June 23, 2017: Platelets
https://www.readbyqxmd.com/read/28631236/use-of-ctx-i-and-pinp-as-bone-turnover-markers-national-bone-health-alliance-recommendations-to-standardize-sample-handling-and-patient-preparation-to-reduce-pre-analytical-variability
#3
P Szulc, K Naylor, N R Hoyle, R Eastell, E T Leary
N-terminal propeptide of type I procollagen and C-terminal telopeptide of type I collagen are the reference standards for bone turnover markers for monitoring osteoporosis treatment. We provide recommendations for standardized sample handling and encompassing aspects of preanalytical variability to improve the reproductibility of their measurements, their reliability, and clinical interpretation. The International Osteoporosis Foundation and International Federation of Clinical Chemistry bone turnover marker standards working group have identified N-terminal propeptide of type I procollagen (PINP) and C-terminal telopeptide of type I collagen (CTX-I) in the blood to be the international reference standards for bone turnover markers for the prediction of fracture risk and monitoring of osteoporosis treatment...
June 19, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28609003/preanalytic-specimen-triage-smears-cell-blocks-cytospin-preparations-transport-media-and-cytobanking
#4
Gilda da Cunha Santos, Mauro A Saieg
With increasing requests for the evaluation of prognostic and predictive molecular biomarkers, great attention must be paid to the preanalytical issues regarding sample quality and DNA/RNA yield from all different types of cytological preparations. The objectives of this review were: 1) to provide an update regarding the importance of specimen triage as well as specimen handling and collection; 2) to discuss the different cell preparations that can be used for molecular testing, their advantages and limitations; and 3) to highlight the strategies for biobanking cytology samples...
June 2017: Cancer
https://www.readbyqxmd.com/read/28604235/discovery-validation-and-optimization-of-cerebrospinal-fluid-biomarkers-for-use-in-parkinson-s-disease
#5
Lucia Farotti, Silvia Paciotti, Anna Tasegian, Paolo Eusebi, Lucilla Parnetti
Parkinson's disease (PD) is a complex and phenotypically heterogeneous neurodegenerative disease, for which the diagnosis is mainly based on clinical parameters (even if neuroimaging plays a role in diagnostic assessment); as a consequence, misdiagnosis is common, especially in early stages. Thus, there is an urgent need of having available biomarkers in order to achieve an early and accurate diagnosis. Since molecular changes in the brain are reliably and timely reflected in cerebrospinal fluid (CSF), CSF represents an ideal source for biomarkers of different pathophysiological processes characterizing the disease since its early phases...
June 19, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28593925/intensive-educational-efforts-combined-with-external-quality-assessment-improve-the-preanalytical-phase-in-general-practitioner-offices-and-nursing-homes
#6
Una Ørvim Sølvik, Wenche Iren Bjelkarøy, Kari van den Berg, Anne Lise Saga, Helle Borgstrøm Hager, Sverre Sandberg
BACKGROUND: Errors in the preanalytical phase in clinical laboratories affect patient safety. The aim of this study was to evaluate the effect of intensive educational efforts together with external quality assessment (EQA) of the preanalytical phase from 2013 to 2015 to improve patient identification in primary health care in Norway. In addition, routines for venous and capillary blood sampling were investigated. METHODS: A preanalytical EQA was circulated in 2013 by the Norwegian Quality Improvement of Laboratory Examinations (Noklus) to general practitioner offices and nursing homes (n=2000) to obtain information about important issues to focus on before launching an intensive educational program with courses, posters and visits in 2013-2015...
May 5, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28593910/the-eflm-strategy-for-harmonization-of-the-preanalytical-phase
#7
REVIEW
Giuseppe Lippi, Ana-Maria Simundic
The Working Group for the Preanalytical Phase (WG-PRE) was officially established by the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) in 2013, with the aim of improving harmonization in the preanalytical phase across European member societies. Since its early birth, the WG-PRE has already completed a number of projects, including harmonizing the definition of fasting status, patient and blood tubes identification, color coding of blood collection tubes, sequence of tubes during blood drawing and participation in the development of suitable preanalytical quality indicators...
June 3, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28582600/effect-of-time-and-temperature-on-anticoagulant-dependent-pseudothrombocytopenia-in-g%C3%A3-ttingen-minipigs
#8
Tim Erkens, Liesbeth Van den Sande, Jill Witters, Filip Verbraeken, Adriana Looszova, Bianca Feyen
BACKGROUND: A marked decrease in thrombocyte count was observed between subsequent measurements of the same EDTA blood sample in several minipigs, but little information was available explaining this finding. OBJECTIVES: The objective was to evaluate the impact of several preanalytic variables on thrombocyte counts in minipigs, in order to improve understanding of the in vitro thrombocyte decrease observed. MATERIALS AND METHODS: Hematology blood samples from male and female Göttingen minipigs were collected using EDTA or citrate as an anticoagulant...
June 5, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28540429/identification-of-markers-for-quiescent-pancreatic-stellate-cells-in-the-normal-human-pancreas
#9
Michael Friberg Bruun Nielsen, Michael Bau Mortensen, Sönke Detlefsen
Pancreatic stellate cells (PSCs) play a central role as source of fibrogenic cells in pancreatic cancer and chronic pancreatitis. In contrast to quiescent hepatic stellate cells (qHSCs), a specific marker for quiescent PSCs (qPSCs) that can be used in formalin-fixed and paraffin embedded (FFPE) normal human pancreatic tissue has not been identified. The aim of this study was to identify a marker enabling the identification of qPSCs in normal human FFPE pancreatic tissue. Immunohistochemical (IHC), double-IHC, immunofluorescence (IF) and double-IF analyses were carried out using a tissue microarray consisting of cores with normal human pancreatic tissue...
May 25, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28511108/wine-yeasts-identification-by-maldi-tof-ms-optimization-of-the-preanalytical-steps-and-development-of-an-extensible-open-source-platform-for-processing-and-analysis-of-an-in-house-ms-database
#10
Cristina Gutiérrez, M Ángeles Gómez-Flechoso, Ignacio Belda, Javier Ruiz, Nour Kayali, Luis Polo, Antonio Santos
Saccharomyces cerevisiae is the most important yeast species for the production of wine and other beverages. In addition, nowadays, researchers and winemakers are aware of the influence of non-Saccharomyces in wine aroma complexity. Due to the high microbial diversity associated to several agro-food processes, such as winemaking, developing fast and accurate methods for microbial identification is demanded. In this context, MALDI-TOF MS mass fingerprint provides reliable tool for fast biotyping and classification of microorganisms...
May 8, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28506684/study-of-preanalytic-and-analytic-variables-for-clinical-next-generation-sequencing-of-circulating-cell-free-nucleic-acid
#11
Meenakshi Mehrotra, Rajesh R Singh, Wei Chen, Richard S P Huang, Alaa A Almohammedsalim, Bedia A Barkoh, Crystal M Simien, Marcos Hernandez, Carmen Behrens, Keyur P Patel, Mark J Routbort, Russell R Broaddus, L Jeffrey Medeiros, Ignacio I Wistuba, Scott Kopetz, Rajyalakshmi Luthra
Detection of mutations in plasma circulating cell-free DNA (cfDNA) by next-generation sequencing (NGS) has opened up new possibilities for monitoring treatment response and disease progression in patients with solid tumors. However, implementation of cfDNA genotyping in diagnostic laboratories requires systematic assessment of preanalytical parameters and analytical performance of NGS platforms. We assessed the effects of peripheral blood collection tube and plasma separation time on cfDNA yield and integrity and performance of the Ion PGM, Proton, and MiSeq NGS platforms...
May 12, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28504552/validation-of-electrochemiluminescence-assays-for-highly-sensitive-and-reproducible-quantification-of-%C3%AE-synuclein-in-cerebrospinal-fluid
#12
Niels Kruse, Omar M El-Agnaf, Brit Mollenhauer
AIM: α-Synuclein (aSyn), a putative cerebrospinal fluid biomarker, may support the diagnosis of neurodegenerative diseases. Previous studies led to conflicting results due to different preanalytical and analytical procedures. Standardized assays are required to allow for comparison of results from different laboratories. MATERIALS & METHODS: We performed a side-by-side validation of a commercially available (Meso Scale Discovery, MD, USA) and a 'homebrew' assay for quantification of aSyn according to published guidelines...
May 15, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28502727/concordance-between-research-sequencing-and-clinical-pharmacogenetic-genotyping-in-the-emerge-pgx-study
#13
Laura J Rasmussen-Torvik, Berta Almoguera, Kimberly F Doheny, Robert R Freimuth, Adam S Gordon, Hakon Hakonarson, Jared B Hawkins, Ammar Husami, Lynn Ivacic, Iftikhar J Kullo, Michael D Linderman, Teri A Manolio, Aniwaa O Obeng, Renata Pellegrino, Cynthia A Prows, Marylyn D Ritchie, Maureen Smith, Sarah C Stallings, Wendy A Wolf, Kejian Zhang, Stuart A Scott
There has been extensive debate about both the necessity of orthogonal confirmation of next-generation sequencing (NGS) results in Clinical Laboratory Improvement Amendments-approved laboratories and return of research NGS results to participants enrolled in research studies. In eMERGE-PGx, subjects underwent research NGS using PGRNseq and orthogonal targeted genotyping in clinical laboratories, which prompted a comparison of genotyping results between platforms. Concordance (percentage agreement) was reported for 4077 samples tested across nine combinations of research and clinical laboratories...
May 11, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28481034/impact-of-different-storage-times-at-room-temperature-of-unspun-citrated-blood-samples-on-routine-coagulation-tests-results-results-of-a-bicenter-study-and-review-of-the-literature
#14
P Toulon, S Metge, M Hangard, S Zwahlen, S Piaulenne, V Besson
INTRODUCTION: A maximum delay between blood collection and coagulation testing of 4 hours is recommended by most guidelines. As information on optimal storage times is limited, we investigated the potential effect of different storage times of unspun tubes, that is, ≤2, 4, 6, and 8 hours, on routine coagulation test results. METHODS: Four evacuated polymer tubes containing 0.109 mol/L tri-Na citrate were drawn from 144 patients, including 39 patients on vitamin K-antagonists...
May 8, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28471194/-lactate-dehydrogenase-old-tumour-marker-in-the-light-of-current-knowledge-and-preanalytic-conditions
#15
K Greplová, I Selingerová, D Valík, K Pilatova, M Češková, L Zdražilová Dubská
With the development and subsequent clinical applications of anticancer immuno-and angiomodulatory therapies and expanded knowledge on significance of tumor microenvironment for disease prognosis and treatment outcome, a classical blood analyte, lactate dehydrogenase (LDH), gains in importance as a tumor marker reflecting to some extent immunosupressive and angiogenic tumour milieu. Physical extravascular hemolysis due to complicated or inaccurate blood sampling interferes strongly with quantification of LDH in serum/plasma samples...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28438806/emerging-affinity-based-proteomic-technologies-for-large-scale-plasma-profiling-in-cardiovascular-disease
#16
REVIEW
J Gustav Smith, Robert E Gerszten
Plasma biomarkers that reflect molecular states of the cardiovascular system are central for clinical decision making. Routinely used plasma biomarkers include troponins, natriuretic peptides, and lipoprotein particles, yet interrogate only a modest subset of pathways relevant to cardiovascular disease. Systematic profiling of a larger portion of circulating plasma proteins (the plasma proteome) will provide opportunities for unbiased discovery of novel markers to improve diagnostic or predictive accuracy. In addition, proteomic profiling may inform pathophysiological understanding and point to novel therapeutic targets...
April 25, 2017: Circulation
https://www.readbyqxmd.com/read/28433611/preanalytical-variables-for-liquid-chromatography-mass-spectrometry-lc-ms-analysis-of-human-blood-specimens
#17
REVIEW
Gian Luca Salvagno, Elisa Danese, Giuseppe Lippi
The use of liquid chromatography-mass spectrometry (LC-MS) for both diagnostics and research purposes is rapidly growing in clinical laboratories. As for more conventional areas of in vitro diagnostic testing, many preanalytical variables have an impact on these techniques and may hence jeopardize the quality of tests results. The leading preanalytical variables include patient preparation, the nature of the blood collection tubes and additives, interference from spurious hemolysis, sample handling and management, composition of blood tubes, contamination, as well as storage conditions...
July 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28431643/advances-in-circulating-tumor-dna-analysis
#18
Samantha Perakis, Martina Auer, Jelena Belic, Ellen Heitzer
The analysis of cell-free circulating tumor DNA (ctDNA) is a very promising tool and might revolutionize cancer care with respect to early detection, identification of minimal residual disease, assessment of treatment response, and monitoring tumor evolution. ctDNA analysis, often referred to as "liquid biopsy" offers what tissue biopsies cannot-a continuous monitoring of tumor-specific changes during the entire course of the disease. Owing to technological improvements, efforts for the establishment of preanalytical and analytical benchmark, and the inclusion of ctDNA analyses in clinical trial, an actual clinical implementation has come within easy reach...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28429254/biomarkers-predicting-bone-turnover-in-the-setting-of-ckd
#19
REVIEW
Pieter Evenepoel, Etienne Cavalier, Patrick C D'Haese
PURPOSE OF THE REVIEW: Impaired bone quality contributes to the increased fracture risk in chronic kidney disease patients. Both low and high turnover bone disease may compromise bone quality. The question arises whether bone biomarkers may be additive or replace bone histormorphometry for diagnosing the extremes of bone turnover. RECENT FINDINGS: Studies exploring the performance of established and emerging bone biomarkers against histomorphometric assessment of bone turnover are limited and overall yield inconclusive results as to their diagnostic utility...
April 20, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28428356/biological-variation-estimates-obtained-from-91-healthy-study-participants-for-9-enzymes-in-serum
#20
Anna Carobene, Thomas Røraas, Una Ørvim Sølvik, Marit Sverresdotter Sylte, Sverre Sandberg, Elena Guerra, Irene Marino, Niels Jonker, Gerhard Barla, William A Bartlett, Pilar Fernandez-Calle, Jorge Díaz-Garzón, Francesca Tosato, Mario Plebani, Abdurrahman Coşkun, Mustafa Serteser, Ibrahim Unsal, Ferruccio Ceriotti
BACKGROUND: We sought to develop estimates of biological variation (BV) for 9 enzymes in blood serum as part of the European Biological Variation Study. METHODS: Ninety-one healthy study participants (38 male and 53 female, 21-69 years old) were phlebotomized in each of 10 consecutive weeks at 6 European laboratories. The same preanalytical sample-handling protocol was followed at each center before transport to San Raffaele Hospital, Milan, Italy, for analysis...
June 2017: Clinical Chemistry
keyword
keyword
118448
1
2
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"