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Clinical Chemistry and Laboratory Medicine: CCLM

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https://www.readbyqxmd.com/read/28941352/interlaboratory-variability-of-urinary-iodine-measurements
#1
Till Ittermann, Simone Johner, Harald Below, Matthias Leiterer, Michael Thamm, Thomas Remer, Henry Völzke
BACKGROUND: The iodine status of populations is usually assessed by median urinary iodine concentrations (UIC) in population-based studies, but it is unclear to which extent UIC are comparable across different laboratories. The aim of our study was to investigate the variability of UIC measurements across three well-established German laboratories with long-term clinical-chemical expertise in iodine measurements and to compare these results to the gold standard inductively coupled plasma mass spectrometry (ICP-MS)...
September 23, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28941351/autovalidation-and-automation-of-the-postanalytical-phase-of-routine-hematology-and-coagulation-analyses-in-a-university-hospital-laboratory
#2
Ana Mlinaric, Marija Milos, Désirée Coen Herak, Mirjana Fucek, Vladimira Rimac, Renata Zadro, Dunja Rogic
BACKGROUND: The need to satisfy high-throughput demands for laboratory tests continues to be a challenge. Therefore, we aimed to automate postanalytical phase in hematology and coagulation laboratory by autovalidation of complete blood count (CBC) and routine coagulation test results (prothrombin time [PT], international normalized ratio [PT-INR], activated partial thromboplastin time [APTT], fibrinogen, antithrombin activity [AT] and thrombin time [TT]). Work efficacy and turnaround time (TAT) before and after implementation of automated solutions will be compared...
September 23, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28941350/evaluation-of-analytical-performance-of-a-new-high-sensitivity-immunoassay-for-cardiac-troponin-i
#3
Silvia Masotti, Concetta Prontera, Veronica Musetti, Simona Storti, Rudina Ndreu, Gian Carlo Zucchelli, Claudio Passino, Aldo Clerico
BACKGROUND: The study aim was to evaluate and compare the analytical performance of the new chemiluminescent immunoassay for cardiac troponin I (cTnI), called Access hs-TnI using DxI platform, with those of Access AccuTnI+3 method, and high-sensitivity (hs) cTnI method for ARCHITECT platform. METHODS: The limits of blank (LoB), detection (LoD) and quantitation (LoQ) at 10% and 20% CV were evaluated according to international standardized protocols. For the evaluation of analytical performance and comparison of cTnI results, both heparinized plasma samples, collected from healthy subjects and patients with cardiac diseases, and quality control samples distributed in external quality assessment programs were used...
September 23, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28917080/hyperuricemia-does-not-seem-to-be-an-independent-risk-factor-for-coronary-heart-disease
#4
LETTER
Alessandro Battaggia, Andrea Scalisi, Luca Puccetti
No abstract text is available yet for this article.
September 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28917079/insulin-autoimmune-syndrome-hirata-s-disease-in-an-italian-patient-a-case-report-and-review-of-the-literature
#5
REVIEW
Simona Censi, Maria Paola Albergoni, Nicoletta Gallo, Mario Plebani, Marco Boscaro, Corrado Betterle
We describe the case of a 54-year-old Caucasian Italian male experiencing episodes of hypoglycemia, occurring mainly after meals. He had never been exposed to insulin and was taking ramipril, flecainide and acetylsalicylic acid. An oral glucose tolerance test (OGTT) showed high blood glucose levels diagnostic for diabetes mellitus at 120 min and hypoglycemia with inappropriately high insulin levels at 240 min. The 72-h fasting test, abdominal computed tomography (CT) and positron emission tomography-CT were normal...
September 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28915108/development-of-an-internally-controlled-quantitative-pcr-to-measure-total-cell-associated-hiv-1-dna-in-blood
#6
LETTER
Ilaria Vicenti, Genny Meini, Francesco Saladini, Alessia Giannini, Adele Boccuto, Elisabetta Schiaroli, Maurizio Zazzi
No abstract text is available yet for this article.
September 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28915107/selective-changes-in-cholesterol-metabolite-levels-in-plasma-of-breast-cancer-patients-after-tumor-removal
#7
LETTER
Pavel Soucek, David Vrana, Yune-Fang Ueng, Shouzou Wei, Renata Kozevnikovova, Frederick Peter Guengerich
No abstract text is available yet for this article.
September 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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
#8
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/28902618/high-sensitivity-assays-for-cardiac-troponins-continued
#9
EDITORIAL
Karl J Lackner
No abstract text is available yet for this article.
September 13, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28902617/analytical-quality-an-unfinished-journey
#10
EDITORIAL
Mario Plebani
No abstract text is available yet for this article.
September 13, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28902616/mef2c-loss-of-function-mutation-associated-with-familial-dilated-cardiomyopathy
#11
Fang Yuan, Zhao-Hui Qiu, Xing-Hua Wang, Yu-Min Sun, Jun Wang, Ruo-Gu Li, Hua Liu, Min Zhang, Hong-Yu Shi, Liang Zhao, Wei-Feng Jiang, Xu Liu, Xing-Biao Qiu, Xin-Kai Qu, Yi-Qing Yang
BACKGROUND: The MADS-box transcription factor myocyte enhancer factor 2C (MEF2C) is required for the cardiac development and postnatal adaptation and in mice-targeted disruption of the MEF2C gene results in dilated cardiomyopathy (DCM). However, in humans, the association of MEF2C variation with DCM remains to be investigated. METHODS: The coding regions and splicing boundaries of the MEF2C gene were sequenced in 172 unrelated patients with idiopathic DCM. The available close relatives of the index patient harboring an identified MEF2C mutation and 300 unrelated, ethnically matched healthy individuals used as controls were genotyped for MEF2C...
September 13, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28902615/irregular-analytical-errors-in-diagnostic-testing-a-novel-concept
#12
Michael Vogeser, Christoph Seger
BACKGROUND: In laboratory medicine, routine periodic analyses for internal and external quality control measurements interpreted by statistical methods are mandatory for batch clearance. Data analysis of these process-oriented measurements allows for insight into random analytical variation and systematic calibration bias over time. However, in such a setting, any individual sample is not under individual quality control. The quality control measurements act only at the batch level. Quantitative or qualitative data derived for many effects and interferences associated with an individual diagnostic sample can compromise any analyte...
September 13, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28902614/can-a-combination-of-average-of-normals-and-real-time-external-quality-assurance-replace-internal-quality-control
#13
Tony Badrick, Peter Graham
Internal Quality Control and External Quality Assurance are separate but related processes that have developed independently in laboratory medicine over many years. They have different sample frequencies, statistical interpretations and immediacy. Both processes have evolved absorbing new understandings of the concept of laboratory error, sample material matrix and assay capability. However, we do not believe at the coalface that either process has led to much improvement in patient outcomes recently. It is the increasing reliability and automation of analytical platforms along with improved stability of reagents that has reduced systematic and random error, which in turn has minimised the risk of running less frequent IQC...
September 13, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28888086/stability-of-routine-biochemical-analytes-in-whole-blood-and-plasma-serum-focus-on-potassium-stability-from-lithium-heparin
#14
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/28850543/comparative-study-of-the-diagnostic-and-prognostic-value-of-antibodies-against-chimeric-citrullinated-synthetic-peptides-and-ccp3-ccp3-1-assays
#15
María J Gómara, Javier Rodríguez, María J Bleda, Juan P Salvador, Raimon Sanmartí, Isabel Haro
BACKGROUND: The objective of the study was to compare the diagnostic yield of home-made ELISA tests based on synthetic chimeric fibrin/filaggrin citrullinated peptides (CFFCPs) with CCP3 and CCP3.1 commercial tests to detect anti-citrullinated protein/peptide antibodies (ACPAs) in rheumatoid arthritis (RA) patients. The prognostic value is also studied in a cohort of patients with early RA. Moreover, we transfer immunological assays from microtiter plates to microarray formats to allow the simultaneous analysis of several peptide sequences and reduce the volume of serum from patients...
August 29, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28844073/the-effects-of-dry-ice-exposure-on-plasma-ph-and-coagulation-analyses
#16
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/28844072/update-in-diagnosis-and-management-of-primary-aldosteronism
#17
REVIEW
Sofia M Dick, Marina Queiroz, Bárbara L Bernardi, Angélica Dall'Agnol, Letícia A Brondani, Sandra P Silveiro
Primary aldosteronism (PA) is a group of disorders in which aldosterone is excessively produced. These disorders can lead to hypertension, hypokalemia, hypervolemia and metabolic alkalosis. The prevalence of PA ranges from 5% to 12% around the globe, and the most common causes are adrenal adenoma and adrenal hyperplasia. The importance of PA recognition arises from the fact that it can have a remarkably adverse cardiovascular and renal impact, which can even result in death. The aldosterone-to-renin ratio (ARR) is the election test for screening PA, and one of the confirmatory tests, such as oral sodium loading (OSL) or saline infusion test (SIT), is in general necessary to confirm the diagnosis...
August 28, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28841572/use-of-the-sflt-1-plgf-ratio-to-rule-out-preeclampsia-requiring-delivery-in-women-with-suspected-disease-is-the-evidence-reproducible
#18
Enric Sabrià, Paloma Lequerica-Fernández, Paula Lafuente Ganuza, Edwin Eguia Ángeles, Ana I Escudero, Eduardo Martínez-Morillo, Francisco V Alvárez
BACKGROUND: Soluble fms-like tyrosine kinase 1 (sFlt-1) to placental growth factor (PlGF) ratio has been proven to predict preeclampsia occurrence. METHODS: Blood samples from 195 pregnant women with suspected preeclampsia were obtained at obstetric triage admission or from the high-risk pregnancy outpatient office. Serum PlGF and sFlt-1 were measured by an electrochemiluminescence immunoassay (ECLIA) on the immunoanalyser Cobas e601 (Roche Diagnostics) and the corresponding ratio was calculated...
August 25, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28841571/bd-vacutainer%C3%A2-barricor-tube-in-the-emergency-department-reduced-hemolysis-rates-using-partial-draw-tubes-with-reduced-vacuum
#19
LETTER
Christian Ramakers
No abstract text is available yet for this article.
August 25, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28841570/diagnosis-biomarkers-in-acute-intestinal-ischemic-injury-so-close-yet-so-far
#20
REVIEW
Katell Peoc'h, Alexandre Nuzzo, Kevin Guedj, Catherine Paugam, Olivier Corcos
Acute intestinal ischemic injury (i3) is a life-threatening condition with disastrous prognosis, which is currently difficult to diagnose at the early stages of the disease; a rapid diagnosis is mandatory to avoid irreversible ischemia, extensive bowel resection, sepsis and death. The overlapping protein expression of liver and gut related to the complex physiopathology of the disease, the heterogeneity of the disease and its relative rarity could explain the lack of a useful early biochemical marker of i3...
August 25, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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