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Preanalytical

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https://www.readbyqxmd.com/read/28321418/ana-iif-automation-moving-towards-harmonization-results-of-a-multicenter-study
#1
Stefanie Van den Bremt, Sofie Schouwers, Marjan Van Blerk, Lieve Van Hoovels
Background. Our study aimed to investigate whether the introduction of automated anti-nuclear antibody (ANA) indirect immunofluorescence (IIF) analysis decreases the interlaboratory variability of ANA titer results. Method. Three serum samples were sent to 10 laboratories using the QUANTA-Lyser® in combination with the NOVA View®. Each laboratory performed the ANA IIF analysis 10x in 1 run and 1x in 10 different runs and determined the endpoint titer by dilution. One of the three samples had been sent in 2012, before the era of ANA IIF automation, by the Belgian National External Quality Assessment (EQA) Scheme...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28316435/delta-check-for-blood-groups-a-step-ahead-in-blood-safety
#2
Raj Nath Makroo, Aakanksha Bhatia
BACKGROUND: Blood grouping is the single most important test performed by each and every transfusion service. A blood group error has a potential for causing severe life-threatening complications. A number of process strategies have been adopted at various institutions to prevent the occurrence of errors at the time of phlebotomy, pretransfusion testing, and blood administration. A delta check is one such quality control tool that involves the comparison of laboratory test results with results obtained on previous samples from the same patient...
January 2017: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/28284389/biochemical-analyses-of-cerebrospinal-fluid-for-the-diagnosis-of-neurometabolic-conditions-what-can-we-expect
#3
Marta Batllori, Marta Molero-Luis, Mercedes Casado, Cristina Sierra, Rafael Artuch, Aida Ormazabal
In this article, we review the state-of-the-art analysis of different biomarkers in the cerebrospinal fluid for the diagnosis of genetically conditioned, rare, neurometabolic diseases, including glucose transport defects, neurotransmitter (dopamine, serotonin, and gamma-aminobutyric acid) and pterin deficiencies, and vitamin defects (folate, vitamin B6, and thiamine) that affect the brain. The analysis of several key metabolites are detailed, which thus highlights the preanalytical and analytical factors that should be cautiously controlled to avoid misdiagnosis; moreover, these factors may facilitate an adequate interpretation of the biochemical profiles in the context of severe neuropediatric disorders...
November 2016: Seminars in Pediatric Neurology
https://www.readbyqxmd.com/read/28282290/multidisciplinary-training-activities-for-decreasing-preanalytical-mistakes-in-samples-from-primary-care
#4
Adolfo Romero, Juan Gómez-Salgado, José Antonio Gómez-Fernández, Andrés Cobos, Carlos Ruiz-Frutos
BACKGROUND: The presence of preanalytical mistakes (PM) in samples from primary care centres (PCC) is a widely studied topic. Different correcting strategies have been proposed, with variable success. We planned a series of multidisciplinary sessions for clinical update, with the aim to decrease PM rates in samples from PCC. METHODS: The incidence of PM in samples from PCC processed at the laboratories of University Hospital Virgen de la Victoria (LAB1) and University Hospital Juan Ramon Jimenez (LAB2) was assessed during two time periods (October to November 2013 and January to May 2014)...
March 7, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28271451/the-utility-of-biomarkers-in-osteoporosis-management
#5
REVIEW
Patrick Garnero
The measurement of bone turnover markers is useful for the clinical investigation of patients with osteoporosis. Among the available biochemical markers, the measurements of serum procollagen type I N-terminal propeptide (PINP) and the crosslinked C-terminal telopeptide (serum CTX) have been recommended as reference markers of bone formation and bone resorption, respectively. The important sources of preanalytical and analytical variability have been identified for both markers, and precise measurement can now be obtained...
March 7, 2017: Molecular Diagnosis & Therapy
https://www.readbyqxmd.com/read/28248725/3d-tissue-microarray-controls-a-potential-standardization-solution
#6
Charles W Myers, Sonal Bhimji-Patel, Mark Rees, Syed Ashraf Imam, Cynthia Cohen
The use of controls is a hallmark for quality control in anatomic pathology. However, standardization of controls between laboratories has been a significant issue. Differential processing techniques between institutions and a multitude of preanalytical difficulties can result in different immunostain intensities. So called histoid controls, xenografts or culture cell lines, have been discussed in the past but with no recent followup. Herein is presented a histoid termed a 3D tissue microarray control (3D TMAC) control to help alleviate the burgeoning need for control standardization...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28242751/serum-uromodulin-and-mortality-risk-in-patients-undergoing-coronary-angiography
#7
Graciela E Delgado, Marcus E Kleber, Hubert Scharnagl, Bernhard K Krämer, Winfried März, Jürgen E Scherberich
The mucoprotein uromodulin is the most abundant protein in mammalian urine and has important roles in ion transport, maintenance of water and electrolyte balance, and clearance of bacteria from the urinary tract. Low urinary uromodulin concentrations have been associated with increased mortality risk. However, measuring uromodulin in urine has several preanalytic drawbacks, and sensitive assays for the detection of uromodulin in blood have become available. In this study, we investigated the association of serum uromodulin concentration with cardiovascular biomarkers and mortality risk in a large cohort of patients referred for coronary angiography...
February 27, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28242283/blood-venous-sample-collection-recommendations-overview-and-a-checklist-to-improve-quality
#8
REVIEW
Davide Giavarina, Giuseppe Lippi
The extra-analytical phases of the total testing process have substantial impact on managed care, as well as an inherent high risk of vulnerability to errors which is often greater than that of the analytical phase. The collection of biological samples is a crucial preanalytical activity. Problems or errors occurring shortly before, or soon after, this preanalytical step may impair sample quality and characteristics, or else modify the final results of testing. The standardization of fasting requirements, rest, patient position and psychological state of the patient are therefore crucial for mitigating the impact of preanalytical variability...
February 25, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28240952/reference-intervals-for-serum-reactive-oxygen-metabolites-biological-antioxidant-potential-and-oxidative-stress-index-in-adult-rams
#9
Ioannis L Oikonomidis, Evangelos A Kiosis, Christos N Brozos, Maria G Kritsepi-Konstantinou
OBJECTIVE To establish reference intervals for serum reactive oxygen metabolites (ROMs), biological antioxidant potential (BAP), and oxidative stress index (OSi) in adult rams by use of controlled preanalytic and analytic procedures. ANIMALS 123 healthy 1- to 4-year-old rams of 2 Greek breeds (Chios [n = 62] and Florina [61]). PROCEDURES 4 hours after rams were fed, a blood sample was obtained from each ram, and serum was harvested. Concentrations of ROMs and BAP were measured colorimetrically on a spectrophotometric analyzer...
March 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28231060/improving-quality-in-the-preanalytical-phase-through-innovation-on-behalf-of-the-european-federation-for-clinical-chemistry-and-laboratory-medicine-eflm-working-group-for-preanalytical-phase-wg-pre
#10
Giuseppe Lippi, Geoffrey S Baird, Giuseppe Banfi, Karin Bölenius, Janne Cadamuro, Stephen Church, Michael P Cornes, Anna Dacey, Antoine Guillon, Georg Hoffmann, Mads Nybo, Lakdasa Devananda Premawardhana, María Salinas, Sverre Sandberg, Robbert Slingerland, Ana Stankovic, Sylte Marit Sverresdotter, Pieter Vermeersch, Ana-Maria Simundic
It is now undeniable that laboratory testing is vital for the diagnosis, prognostication and therapeutic monitoring of human disease. Despite the many advances made for achieving a high degree of quality and safety in the analytical part of diagnostic testing, many hurdles in the total testing process remain, especially in the preanalytical phase ranging from test ordering to obtaining and managing the biological specimens. The Working Group for the Preanalytical Phase (WG-PRE) of the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) has planned many activities aimed at mitigating the vulnerability of the preanalytical phase, including the organization of three European meetings in the past 7 years...
March 1, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28222302/how-to-handle-adsorption-of-cerebrospinal-fluid-amyloid-%C3%AE-1-42-in-laboratory-practice-identifying-problematic-handlings-and-resolving-the-issue-by-use-of-the-a%C3%AE-42-a%C3%AE-40-ratio
#11
Eline Willemse, Kees van Uffelen, Britta Brix, Sebastiaan Engelborghs, Hugo Vanderstichele, Charlotte Teunissen
INTRODUCTION: We aimed to investigate factors defining amyloid-β (1-42) (Aβ1-42) adsorption during preanalytical workup of cerebrospinal fluid (CSF). METHODS: CSF was transferred to new tubes ≤4 times. Variables tested were different polypropylene tube brands, volumes, CSF Aβ1-42 concentrations, incubation times, pipettes, vortex intensities, and other CSF proteins, including hyperphosphorylated tau and Interleukin 1 Receptor Accessory Protein (IL-1RAcP). An enquiry assessed the number of transfers in current practice...
February 21, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28207411/reporting-altered-test-results-in-hemolyzed-samples-is-the-cure-worse-than-the-disease
#12
Giuseppe Lippi, Gianfranco Cervellin, Mario Plebani
The management of laboratory data in unsuitable (hemolyzed) samples remains an almost unresolved dilemma. Whether or not laboratory test results obtained by measuring unsuitable specimens should be made available to the clinicians has been the matter of fierce debates over the past decades. Recently, an intriguing alternative to suppressing test results and recollecting the specimen has been put forward, entailing the definition and implementation of specific algorithms that would finally allow reporting a preanalytically altered laboratory value within a specific comment about its uncertainty of measurement...
February 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28207409/to-report-or-not-to-report-a-proposal-on-how-to-deal-with-altered-test-results-in-hemolytic-samples
#13
Janne Cadamuro, Cornelia Mrazek, Elisabeth Haschke-Becher, Sverre Sandberg
Preanalytically altered test results are a challenge every laboratory has to face. The release of such results may be to the harm of the patient by triggering wrong clinical decision making in monitoring or treatment. On the other hand, their deletion also might be to the harm of the patient by delaying the time to decision making as the exact value sometimes is not even necessary but rather an answer to the question "Is it raised or lowered". Based on this dilemma and forced to produce laboratory values without any clinical information on the respective patient, laboratories have developed their own preferred way on how to deal with preanalytically altered test results...
February 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28187031/x-ray-of-excised-cancerous-breast-tissue-does-not-affect-clinical-biomarker-expression
#14
Isaac E Lloyd, Alana L Welm, Yoko DeRose, Leigh A Neumayer, Jessica L Kohan, Elisabeth M Malmberg, Mohamed E Salama, Rachel E Factor
CONTEXT: College of American Pathologists (CAP) and the American Society of Clinical Oncology have emphasized the need to reduce preanalytic variables for evaluating predictive biomarker expression in breast cancer. Postoperative x-ray of excised breast tissue is commonplace, yet is a variable that has not been investigated previously. We asked whether such radiation affects expression of relevant biomarkers. DESIGN: A previous study found that human breast cancers grown in mice demonstrate the same immunohistochemical and molecular profiles as the original tumors...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28178899/recognizing-and-reducing-analytical-errors-and-sources-of-variation-in-clinical-pathology-data-in-safety-assessment-studies
#15
A E Schultze, A R Irizarry
Veterinary clinical pathologists are well positioned via education and training to assist in investigations of unexpected results or increased variation in clinical pathology data. Errors in testing and unexpected variability in clinical pathology data are sometimes referred to as "laboratory errors." These alterations may occur in the preanalytical, analytical, or postanalytical phases of studies. Most of the errors or variability in clinical pathology data occur in the preanalytical or postanalytical phases...
February 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/28178898/deciphering-sources-of-variability-in-clinical-pathology-it-s-not-just-about-the-numbers
#16
Nancy E Everds
Preanalytical variables can have significant impacts on clinical pathology parameters evaluated during the conduct of a nonclinical safety or toxicity study. These preanalytical variables can be controlled by careful attention to factors such as animal dietary status (diet composition, fasted, and fed state), restraint and anesthesia, intercurrent procedures, timing of clinical pathology collections, and proficiency of animal technicians. The impact of preanalytical variables on test results can be significant enough to result in difficult interpretations and/or regulatory questions or can obfuscate the effects of a test article...
February 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/28164516/hil-interferences-on-three-hemostasis-analyzers-and-contribution-of-a-preanalytical-module-for-routine-coagulation-assays
#17
Carole Nagant, Laurence Rozen, Anne Demulder
BACKGROUND: Preanalytical issues are a major part of routine coagulation laboratory errors. Automation in detection of preanalytical problems, including hemolysis, icterus and lipemia (HIL), improper tube fill volume, and undue clotting, has recently been implemented on specific hemostasis instruments. The aim of this study was to assess the added value of a new preanalytical module integrated into hemostasis analyzers compared to visual inspection of samples. METHODS: The detection of preanalytical issues was performed by visual or manual inspection of the samples and by the new preanalytical module integrated on the ACL TOP 550...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164307/how-to-quantify-microparticles-in-rbcs-a-validated-flow-cytometry-method-allows-the-detection-of-an-increase-in-microparticles-during-storage
#18
Clémentine Gamonet, Guillaume Mourey, Sophie Aupet, Sabéha Biichle, Régis Petitjean, Chrystelle Vidal, Aurore Pugin, Christian Naegelen, Pierre Tiberghien, Pascal Morel, Fanny Angelot-Delettre, Estelle Seilles, Philippe Saas, Laurent Bardiaux, Francine Garnache-Ottou
BACKGROUND: The procoagulant and proinflammatory microparticles (MPs) released during storage of packed red blood cells (pRBCs) can potentially modify transfusion benefits. A robust method to quantify MPs in pRBCs is needed to evaluate their impact in clinical trials. STUDY DESIGN AND METHODS: The objective was to validate the preanalytic conditions required to prepare pRBC supernatant as well as a method to quantify and evaluate MP variations over 42 days of pRBC storage...
March 2017: Transfusion
https://www.readbyqxmd.com/read/28163015/a-pragmatic-approach-to-sample-acceptance-and-rejection
#19
Janne Cadamuro, Ana-Maria Simundic, Eva Ajzner, Sverre Sandberg
Sample rejection due to preanalytical errors is very common in many medical laboratories worldwide, though the decision when and how to refrain from analyzing such samples is handled very heterogeneously. As a rational, it is mostly stated that it is done to prevent the patient from being harmed by wrong medical decisions based on such values. But when thinking of the consequences of laboratory results instead of their quality being important per se, the rejection of preanalytically altered samples might be harming the patient by the need of re-collection and timely delay...
February 2, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28125403/innovative-software-for-recording-preanalytical-errors-in-accord-with-the-ifcc-quality-indicators
#20
Giuseppe Lippi, Laura Sciacovelli, Ana-Maria Simundic, Mario Plebani
No abstract text is available yet for this article.
March 1, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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