Results 341 to 350 of about 3,008,012 (393)
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External Quality Assessment and the Laboratory Diagnosis of Thrombophilia
Seminars in Thrombosis and Hemostasis, 2005External quality assessment is a tool to compare the result of a particular laboratory test in relation to those of other laboratories as well as to assess the performance of a laboratory test over a prolonged period of time. We evaluated the relationship between the between-laboratory variation and the sample category (normal, borderline, and abnormal)
Frits Haverkate, Piet Meijer
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External quality assessment schemes for toxicology
Forensic Science International, 2002A variety of external quality assurance (EQA) schemes monitor quantitative performance for routine biochemical analysis of agents such as paracetamol, salicylate, ethanol and carboxyhaemoglobin. Their usefulness for toxicologists can be lessened where the concentrations monitored do not extend fully into the toxic range or where the matrix is synthetic,
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External quality assessment of pertussis serology in Germany
European Journal of Clinical Microbiology & Infectious Diseases, 2012The purpose of this investigation was to test the performance of pertussis serology in diagnostic laboratories. The World Health Organization (WHO) Reference Reagent (06/142) and a sample with a low level of antibodies were sent to 200 participants of an external quality assessment (EQA) programme in Germany. The results were reported qualitatively and
N. Kennerknecht +5 more
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External Quality Assessment of Quantitative Urinary Analysis
Annals of Clinical Biochemistry: International Journal of Laboratory Medicine, 1984An external quality-assessment scheme was initiated among a group of 13 clinical chemistry laboratories for the urinary analysis of calcium, chloride, creatinine, glucose, osmolality, phosphate, potassium, protein, sodium, urate and urea and also for the estimation of creatinine clearance.
A E Hurrell, E F Legg
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External Quality Assessment Scheme for Hemostasis in India
Seminars in Thrombosis and Hemostasis, 2007Regular participation in an external quality assessment scheme (EQAS) is critical for ensuring acceptable laboratory performance. However, participation in such programs is uncommon for laboratories performing tests of hemostasis in developing countries.
Sukesh Chandran Nair +2 more
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Quality assessment of haemostatic assays and external quality assessment schemes
1999The coagulation laboratory has a vital role in the diagnosis and management of patients with familial and acquired haemorrhagic and thrombotic disorders. Wherever possible the laboratory methods employed must reflect the state of the art, and the results generated, including locally derived reference values, should be reliable, reproducible and ...
Steve Kitchen +2 more
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Quality goals in external quality assessment are best based on biology
Scandinavian Journal of Clinical and Laboratory Investigation, 1993(1993). Quality goals in external quality assessment are best based on biology. Scandinavian Journal of Clinical and Laboratory Investigation: Vol. 53, No. sup212, pp. 8-9.
Per Hyltoft Petersen, Callum G. Fraser
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External Quality Assessment Schemes for Immunoassays
2013External quality assessment schemes (EQAS) provide an important means of monitoring the quality of the performance of immunoassays in the field. Set up by external bodies and complementing internal quality control procedures, they enable ongoing comparison of individual laboratory results, both with independently established target values and with ...
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External Quality Assessment Schemes for Immunoassays
1981Radioimmunoassays (RIAs) are complex and expensive procedures, yet when properly performed they yield information which has much greater clinical value than most of the simpler analyses in clinical chemistry. Thus, assays of T3, T4 and TSH together provide a very precise measure of the status of the pituitary—thyroid axis; in so doing, they replace ...
W. M. Hunter +2 more
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External quality assessment for immunohistochemistry: experiences from NordiQC
Biotechnic & Histochemistry, 2015Immunohistochemistry (IHC) is applied routinely in surgical and clinical pathology, because it is essential for diagnosis and sub-classification of many neoplastic lesions. Despite its extensive use for more than 40 years, lack of standardization is a major problem; many factors during the pre-analytical, analytical and post-analytical phases affect ...
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