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https://www.readbyqxmd.com/read/28915106/making-sense-of-a-haemolysis-monitoring-and-reporting-system-a-nationwide-longitudinal-multimethod-study-of-68-australian-laboratory-participant-organisations
#1
Ling Li, Elia Vecellio, Stephanie Gay, Rebecca Lake, Mark Mackay, Leslie Burnett, Douglas Chesher, Stephen Braye, Tony Badrick, Johanna I Westbrook, Andrew Georgiou
BACKGROUND: The key incident monitoring and management systems (KIMMS) quality assurance program monitors incidents in the pre- and postanalytical phases of testing in medical laboratories. Haemolysed specimens have been found to be the most frequent preanalytical error and have major implications for patient care. The aims of this study were to assess the suitability of KIMMS for quality reporting of haemolysis and to devise a meaningful method for reporting and monitoring haemolysis...
September 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28910147/effects-of-cold-ischemia-on-rna-stability-and-quality-of-lung-tissues-based-on-standard-preanalytical-code-categorization
#2
Takehiro Matsubara, Shuta Tomida, Junichi Soh, Takahiro Uwabo, Yoshiko Mori, Mizuki Morita, Yasutomo Nasu, Susumu Kanazawa, Shinichi Toyooka
No abstract text is available yet for this article.
September 14, 2017: Biopreservation and Biobanking
https://www.readbyqxmd.com/read/28893861/adrenal-venous-sampling-for-primary-aldosteronism-laboratory-medicine-best-practice
#3
Gregory Kline, Daniel T Holmes
Primary aldosteronism (PA) is the most common form of secondary hypertension and is critical to identify because when caused by an aldosterone-producing adenoma (APA) or another unilateral form, it is potentially curable, and even when caused by bilateral disease, antihypertensives more specific to PA treatment can be employed (ie, aldosterone antagonists). Identification of unilateral forms is not generally accomplished with imaging because APAs may be small and elude detection, and coincidental identification of a non-functioning incidentaloma contralateral to an APA may lead to removal of an incorrect gland...
September 11, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28888086/stability-of-routine-biochemical-analytes-in-whole-blood-and-plasma-serum-focus-on-potassium-stability-from-lithium-heparin
#4
Anne Marie Dupuy, Jean Paul Cristol, Bruno Vincent, Anne Sophie Bargnoux, Mickael Mendes, Pascal Philibert, Kadda Klouche, Stéphanie Badiou
BACKGROUND: Blood specimens are transported from clinical departments to the biochemistry laboratory by hospital courier service, sometimes over long distances. The aim of this study was to assess the stability of common biochemical analytes in venous blood under our routine transport conditions and to evaluate analyte stability after prompt or delayed centrifugation. METHODS: We investigated pre- and postanalytical contributions of 32 biochemical analytes in plasma and serum samples from 10 patients (healthy adults and patients from intensive care units)...
September 9, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28873014/impact-of-preanalytical-variations-in-blood-derived-biospecimens-on-omics-studies-toward-precision-biobanking
#5
Jae-Eun Lee, Young-Youl Kim
Research data and outcomes do vary across populations and persons, but this is not always due to experimental or true biological variation. Preanalytical components of experiments, be they biospecimen acquisition, preparation, storage, or transportation to the laboratory, may all contribute to apparent variability in research data, outcomes, and interpretation. The present review article and biobanking innovation analysis offer new insights with a summary of such preanalytical variables, for example, the type of blood collection tube, centrifugation conditions, long-term sample storage temperature, and duration, on output of omics analyses of blood-derived biospecimens: whole blood, serum, plasma, buffy coat, and peripheral blood mononuclear cells...
September 5, 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28853417/recommendations-for-cerebrospinal-fluid-examination-in-acute-leukemia
#6
Sandrine Girard, Odile Fenneteau, Fanélie Mestrallet, Xavier Troussard, Jean-François Lesesve
Cytological identification of blasts in cerebrospinal fluid in acute leukemia, lymphoid or myeloid, in adult and child, at diagnosis or during follow up lead to the diagnosis of leukemic meningitidis. Suitable CNS therapy based on a defined "CNS status" following an international standardized classification, lead to decrease cerebrospinal relapses. Established in 1993, this classification allows to treat patients based on their CNS status. Based on the red blood cells count, nucleated cells count and presence of blasts, it requires a standard technical procedure that guarantees the comparability of results coming from different medical laboratory...
August 30, 2017: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/28844073/the-effects-of-dry-ice-exposure-on-plasma-ph-and-coagulation-analyses
#7
Lene Trondsetås, Gustav Mikkelsen, Ingrid Alsos Lian
BACKGROUND: We recently observed that exposure to dry ice lowered sample pH and increased clotting times in lupus anticoagulant analyses, and that such changes could be prevented by placing samples at -80°C after dry ice exposure. In the current study, we sought to evaluate the effects of dry ice exposure on pH and various commonly used coagulation analyses. METHODS: Citrated plasma from 30 healthy blood donors was allocated to four preanalytical regimes: (1) immediate analysis of fresh plasma or (2) storage at -20°C; (3) storage at -20°C followed by dry ice exposure for 24 h or (4) storage at -20°C followed by dry ice exposure for 24 h and storage at -80°C for 24 h before analysis...
August 28, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28841240/preanalytic-processing-of-rat-plasma-influences-thrombin-generation-and-fibrinolysis-assays
#8
Marjory B Brooks, Alyssa P Stablein, Lynn Johnson, Albert Eric Schultze
BACKGROUND: Thrombin generation assays (TGA) have potential applications as measures of hemostatic balance in animal models. However, variations in plasma processing greatly influence human TGA, and may also impact on the translational value of TGA in animal studies. OBJECTIVES: The purpose of the study was to compare the performance characteristics of Sprague-Dawley rat plasma prepared by single vs double centrifugation protocols in TGA and fibrinolysis assays...
August 25, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28829990/interlaboratory-variability-of-ki67-staining-in-breast-cancer
#9
Cornelia M Focke, Horst Bürger, Paul J van Diest, Kai Finsterbusch, Doreen Gläser, Eberhard Korsching, Thomas Decker
BACKGROUND: Postanalytic issues of Ki67 assessment in breast cancers like counting method standardisation and interrater bias have been subject of various studies, but little is known about analytic variability of Ki67 staining between pathology labs. Our aim was to study interlaboratory variability of Ki67 staining in breast cancer using tissue microarrays (TMAs) and central assessment to minimise preanalytic and postanalytic influences. METHODS: Thirty European pathology labs stained serial slides of a TMA set of breast cancer tissues with Ki67 according to their routine in-house protocol...
August 19, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28809747/oxidation-of-pth-in-vivo-feature-or-effect-of-preanalytical-conditions
#10
Stan R Ursem, Marc G Vervloet, Jacquelien J G Hillebrand, Renate T de Jongh, Annemieke C Heijboer
BACKGROUND: Posttranslational oxidation of parathyroid hormone (PTH) modifies its biological activity. Measurement of non-oxidized PTH (n-oxPTH) could be an improvement in assessing PTH status, as intact PTH may rather reflect oxidative stress. However, it is debated whether oxidation of PTH occurs in vivo, or whether it is mainly an in vitro artifact. The aim of this study was to investigate the influence of different preanalytical conditions on the oxidation of PTH within a wide range of plasma PTH concentrations and oxidation propensity...
August 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28804838/platelet-function-tests-preanalytical-variables-clinical-utility-advantages-and-disadvantages
#11
Anne-Mette Hvas, Erik Lerkevang Grove
Platelet function tests are mainly used in the diagnostic work-up of platelet disorders. During the last decade, the additional use of platelet function tests to evaluate the effect of antiplatelet therapy has also emerged in an attempt to identify patients with an increased risk of arterial thrombosis. Furthermore, platelet function tests are increasingly used to measure residual effect of antiplatelet therapy prior to surgery with the aim of reducing the risk of bleeding. To a limited extend, platelet function tests are also used to evaluate hyperaggregability as a potential marker of a prothrombotic state outside the setting of antiplatelet therapy...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28804816/preanalytical-issues-in-hemostasis-and-thrombosis-testing
#12
Giuseppe Lippi, Emmanuel J Favaloro
Hemostasis testing is critical to many hemorrhagic and thrombotic disorders, wherein laboratory diagnostics can provide critical information for diagnosis, prognostication, and therapeutic monitoring. Due to this crucial role in modern medicine, hemostasis tests should be carried out at their highest degree of quality, thus encompassing standardization and monitoring of all phases of the testing process. It is now clearly established that the preanalytical phase is the most critical and vulnerable part of the total testing process, since up to 70% of diagnostic errors are due to highly manual activities encompassing patient preparation and collection of biological samples, as well as handling, transportation, preparation and storage of blood specimens...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28795528/limit-of-detection-and-threshold-for-positivity-of-the-centers-for-disease-control-and-prevention-assay-for-factor-viii-inhibitors
#13
Connie H Miller, Brian Boylan, Amy D Shapiro, Steven R Lentz, Brian M Wicklund
BACKGROUND: The Bethesda assay (BA) for measurement of factor VIII (FVIII) inhibitors called for quantitation of positive inhibitors using dilutions producing 25-75% residual activity (RA), corresponding to 0.4-2.0 Bethesda units, recommending use of "more sensitive methods" for samples with RA closer to 100%. The Nijmegen modification (NBA) changed the reagents used but not these calculations. Some specimens negative by NBA have been shown to have FVIII antibodies detectable by sensitive immunologic methods...
August 10, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28777141/cytologic-histologic-discrepancies-in-pathology-of-the-uterine-cervix-analysis-of-the-clinical-and-pathologic-factors
#14
Fadi W Abdul-Karim, Bin Yang
Cytologic-histologic correlation (CHC) represents a documented effort to obtain and compare, when available, gynecologic cytology reports with an interpretation of high-grade squamous intraepithelial lesion or malignancy, with the subsequent histopathology report, and to determine the possible cause of any discrepancy. The correlation is influenced by multiple closely interdependent clinical and pathologic factors. Many of these factors including the sensitivity and accuracy of colposcopy-directed biopsy, the diligence of the colposcopist, and the attributes of the cervical lesion represent "preanalytical" factors which can significantly affect the CHC outcome, but are often less emphasized during CHC process...
September 2017: Advances in Anatomic Pathology
https://www.readbyqxmd.com/read/28775174/comparison-of-protein-based-cell-of-origin-classification-to-the-lymph2cx-rna-assay-in-a-cohort-of-diffuse-large-b-cell-lymphomas-in-malaysia
#15
Kean-Chang Phang, Ariz Akhter, Nur Maya Sabrina Tizen, Faridah Abd Rahman, Raja Zahratul Azma, Ghaleb Elyamany, Meer-Taher Shabani-Rad, Noraidah Masir, Adnan Mansoor
AIMS: The cell of origin (COO) based molecular characterisation into germinal centre B-cell-like (GCB) and activated B-cell-like (ABC) subtypes are central to the pathogenesis and clinical course in diffuse large B-cell lymphoma (DLBCL). Globally, clinical laboratories employ pragmatic but less than ideal immunohistochemical (IHC) assay for COO classification. Novel RNA-based platforms using routine pathology samples are emerging as new gold standard and offer unique opportunities for assay standardisation for laboratories across the world...
August 3, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28753865/prognostic-biomarkers-used-for-localised-prostate-cancer-management-a-systematic-review
#16
REVIEW
Pierre-Jean Lamy, Yves Allory, Anne-Sophie Gauchez, Bernard Asselain, Philippe Beuzeboc, Patricia de Cremoux, Jacqueline Fontugne, Agnès Georges, Christophe Hennequin, Jacqueline Lehmann-Che, Christophe Massard, Ingrid Millet, Thibaut Murez, Marie-Hélène Schlageter, Olivier Rouvière, Diana Kassab-Chahmi, François Rozet, Jean-Luc Descotes, Xavier Rébillard
CONTEXT: Prostate cancer stratification is based on tumour size, pretreatment PSA level, and Gleason score, but it remains imperfect. Current research focuses on the discovery and validation of novel prognostic biomarkers to improve the identification of patients at risk of aggressive cancer or of tumour relapse. OBJECTIVE: This systematic review by the Intergroupe Coopérateur Francophone de Recherche en Onco-urologie (ICFuro) analysed new evidence on the analytical validity and clinical validity and utility of six prognostic biomarkers (PHI, 4Kscore, MiPS, GPS, Prolaris, Decipher)...
March 7, 2017: European Urology Focus
https://www.readbyqxmd.com/read/28750474/potential-misdiagnosis-of-von-willebrand-disease-and-haemophilia-caused-by-ineffective-mixing-of-thawed-plasma
#17
E J Favaloro, S Oliver, S Mohammed, M Ahuja, E Grzechnik, S Azimulla, J McDonald, G Lima-Oliveira, G Lippi
INTRODUCTION: von Willebrand disease (VWD) reflects a loss or dysfunction in von Willebrand factor (VWF), while haemophilia represents a loss or dysfunction of clotting factors such as factor VIII (FVIII) or FIX. Their diagnosis requires laboratory testing, with this potentially compromised by preanalytical events, including poor sample quality. This study assessed the effect of inadequate mixing as a potential cause of VWD and haemophilia misdiagnosis. METHODS: After completion of requested testing, 48 consecutive patient samples comprising separate aliquots from single collections were individually pooled, appropriately mixed, then frozen in separate aliquots, either at -20°C or -80°C for 2-7 days...
July 27, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28748476/quantitative-rt-pcr-for-micrornas-in-biofluids
#18
Michael Thorsen, Thorarinn Blondal, Peter Mouritzen
MicroRNAs in biofluids hold great promise as minimally invasive diagnostic biomarkers for a wide range of diseases and biological processes. One of the most sensitive technologies for detection and measuring expression levels of microRNA is quantitative RT-PCR. However, quantification of microRNA in biofluid samples is challenging in many ways. Biofluids contain low levels of RNA and high levels of inhibitors of enzymatic processes like reverse transcription and PCR. Furthermore, biofluids are susceptible to many preanalytical variables...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28714765/comparison-of-estrogen-and-progesterone-receptor-antibody-reagents-using-proficiency-testing-data
#19
Megan L Troxell, Thomas Long, Jason L Hornick, Abiy B Ambaye, Kristin C Jensen
CONTEXT: - Immunohistochemical analysis of estrogen receptor (ER) and progesterone receptor (PgR) expression in breast cancer is the current standard of care and directly determines therapy. In 2010 the American Society of Clinical Oncology and the College of American Pathologists (ASCO/CAP) published guidelines for ER and PgR predictive testing, encompassing preanalytic, analytic, postanalytic factors; antibody validation; and proficiency testing. OBJECTIVE: - To compare the performance of different antibody reagents for ER and PgR immunohistochemical analysis by using CAP proficiency testing data...
July 17, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/28706925/overcoming-preanalytical-issues-for-diagnosing-diabetes-with-fasting-plasma-glucose
#20
EDITORIAL
Martina Montagnana, Giuseppe Lippi
No abstract text is available yet for this article.
June 2017: Annals of Translational Medicine
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