Search Results - "Lothar Siekmann"

The Asian project for collaborative derivation of reference intervals: (1) strategy and major results of standardized analytes by Ichihara, Kiyoshi, Ceriotti, Ferruccio, Tam, Tran Huu, Sueyoshi, Shigeo, Poon, Priscilla M K, Thong, Mee Ling, Higashiuesato, Yasushi, Wang, Xuejing, Kataoka, Hiromi, Matsubara, Akemi, Shiesh, Shu-Chu, Muliaty, Dewi, Kim, Jeong-Ho, Watanabe, Masakazu, Lam, Christopher W K, Siekmann, Lothar, Lopez, Joseph B, Panteghini, Mauro

“…A multicenter study conducted in Southeast Asia to derive reference intervals (RIs) for 72 commonly measured analytes (general chemistry, inflammatory markers,…”
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Metrological traceability - a concept for standardization in laboratory medicine by Siekmann, Lothar

“…The concept of measurement traceability provides the most important strategy in achieving standardization in laboratory medicine aimed at equivalent…”
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Implementation of the concept of traceability in laboratory medicine in external quality assessment by Siekmann, Lothar

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Determination of steroid hormones by the use of isotope dilution--mass spectrometry: a definitive method in clinical chemistry by Siekmann, L

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External Quality Assessment Scheme for reference laboratories - review of 8 years' experience by Kessler, Anja, Siekmann, Lothar, Weykamp, Cas, Geilenkeuser, Wolf Jochen, Dreazen, Orna, Middle, Jonathan, Schumann, Gerhard

“…We describe an External Quality Assessment Scheme (EQAS) intended for reference (calibration) laboratories in laboratory medicine and supervised by the…”
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Creatinine measurement: state of the art in accuracy and interlaboratory harmonization by Miller, W Greg, Myers, Gary L, Ashwood, Edward R, Killeen, Anthony A, Wang, Edward, Thienpont, Linda M, Siekmann, Lothar

“…The National Kidney Disease Education Program recommends calculating glomerular filtration rate from serum creatinine concentration. Accurate creatinine…”
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Requirements for reference (calibration) laboratories in laboratory medicine by Siekmann, Lothar

“…In addition to reference measurement procedures and reference materials, reference or calibration laboratories play an integral role in the implementation of…”
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Development, validation, and certification by isotope dilution gas chromatography-mass spectrometry of lyophilized human serum reference materials for cortisol (CRM 192 and 193) and progesterone (CRM 347 and 348) by Thienpont, L, Siekmann, L, Lawson, A, Colinet, E, De Leenheer, A

“…The Community Bureau of Reference of the European Communities has produced four batches of lyophilized serum Certified Reference Materials, two for cortisol…”
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Application of a point of care creatinine device for trend monitoring in kidney transplant patients: fit for purpose? by van Lint, Céline L, van der Boog, Paul J M, Romijn, Fred P H T M, Schenk, Paul W, van Dijk, Sandra, Rövekamp, Ton J M, Kessler, Anja, Siekmann, Lothar, Rabelink, Ton J, Cobbaert, Christa M

“…The StatSensor® Xpress-i™, a point-of-care system for blood creatinine measurement, offers patients the possibility of self-monitoring creatinine. In this…”
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Procedimientos primarios de referencia de la IFCC para la medición de concentraciones de actividad catalítica de enzimas a 37 C by Gerhard Schumann, Ryoji Aoki, Carlo A. Ferrero, Glenn Ehlers, Georges Férard, F. Javier Gella, Poul Jørgen Jørgensen, Takahashi Kanno, Art Kessner, Rainer Klauke, Hans-Joachim Kytzia, Jean-Marc Lessinger, W. Gregory Miller, Rolf Nagel, Jean Pauwels, Heinz Schimmel, Lothar Siekmann, Gerhard Weidemann, Kiyoshi Yoshida, Ferruccio Ceriotti

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State of the art in trueness and interlaboratory harmonization for 10 analytes in general clinical chemistry by Miller, W Greg, Myers, Gary L, Ashwood, Edward R, Killeen, Anthony A, Wang, Edward, Ehlers, Glenn W, Hassemer, David, Lo, Stanley F, Seccombe, David, Siekmann, Lothar, Thienpont, Linda M, Toth, Alan

“…Harmonization and standardization of results among different clinical laboratories is necessary for clinical practice guidelines to be established. To evaluate…”
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Networks of reference measurement laboratories in laboratory medicine : activities of the Joint Committee on Traceability (JCTLM, WG-2) by SIEKMANN, Lothar

“…Traceability of a value attributed to a routine sample, a calibrator or a control material is established by a series of comparative measurements using…”
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Standardization of hapten immunoprocedures: total cortisol by Gosling, J P, Middle, J, Siekmann, L, Read, G

“…The broad objectives of this report are to enhance the clinical utility of the results of hapten measurement immunoprocedures by encouraging standardization of…”
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Genome-wide linkage scan for bladder exstrophy-epispadias complex by Ludwig, Michael, Rüschendorf, Franz, Saar, Kathrin, Hübner, Norbert, Siekmann, Lothar, Boyadjiev, Simeon A., Reutter, Heiko

“…BACKGROUND: The bladder exstrophy‐epispadias complex represents a spectrum of urogenital anomalies in which part or all of the distal urinary tract fail to…”
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Steroid sulfatase (STS) expression in the human temporal lobe: enzyme activity, mRNA expression and immunohistochemistry study by Steckelbroeck, Stephan, Nassen, Alexander, Ugele, Bernhard, Ludwig, Michael, Watzka, Matthias, Reissinger, Annette, Clusmann, Hans, Lütjohann, Dieter, Siekmann, Lothar, Klingmüller, Dietrich, Hans, Volkmar H.

“…Dehydroepiandrosterone (DHEA) and its sulfate (DHEAS) are suggested to be important neurosteroids. We investigated steroid sulfatase (STS) in human temporal…”
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Estimating the uncertainty of stability for matrix CRMs by Linsinger, T P, Pauwels, J, Lamberty, A, Schimmel, H G, van der Veen, A M, Siekmann, L

“…The new version of ISO Guide 34 requires producers of certified reference materials (CRMs) to include contributions of possible instability to the overall CRM…”
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IFCC primary reference procedures for the measurement of catalytic activity concentrations of enzymes at 37 degrees C. International Federation of Clinical Chemistry and Laboratory Medicine. Part 6. Reference procedure for the measurement of catalytic concentration of gamma-glutamyltransferase by Schumann, Gerhard, Bonora, Roberto, Ceriotti, Ferruccio, Férard, Georges, Ferrero, Carlo A, Franck, Paul F H, Gella, F Javier, Hoelzel, Wieland, Jørgensen, Poul Jørgen, Kanno, Takashi, Kessner, Art, Klauke, Rainer, Kristiansen, Nina, Lessinger, Jean-Marc, Linsinger, Thomas P J, Misaki, Hideo, Panteghini, Mauro, Pauwels, Jean, Schiele, Françoise, Schimmel, Heinz G, Weidemann, Gerhard, Siekmann, Lothar

“…This paper is the sixth in a series dealing with reference procedures for the measurement of catalytic activity concentrations of enzymes at 37 degrees C and…”
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IFCC primary reference procedures for the measurement of catalytic activity concentrations of enzymes at 37 degrees C by Schumann, Gerhard, Aoki, Ryoji, Ferrero, Carlo A, Ehlers, Glenn, Férard, Georges, Gella, F-Javier, Jørgensen, Poul Jørgen, Kanno, Takahashi, Kessner, Art, Klauke, Rainer, Kytzia, Hans-Joachim, Lessinger, Jean-Marc, Miller, W Gregory, Nagel, Rolf, Pauwels, Jean, Schimmel, Heinz, Siekmann, Lothar, Weidemann, Gerhard, Yoshida, Kyoshi, Ceriotti, Ferruccio

“…This paper is the eighth in a series dealing with reference procedures for the measurement of catalytic activity concentrations of enzymes at 37 degrees C and…”
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Characterization of the dehydroepiandrosterone (DHEA) metabolism via oxysterol 7α‐hydroxylase and 17‐ketosteroid reductase activity in the human brain by Steckelbroeck, Stephan, Watzka, Matthias, Lütjohann, Dieter, Makiola, Paul, Nassen, Alexander, Hans, Volkmar H. J., Clusmann, Hans, Reissinger, Annette, Ludwig, Michael, Siekmann, Lothar, Klingmüller, Dietrich

“…Dehydroepiandrosterone and its sulphate are important factors for vitality, development and functions of the CNS. They were found to be subjects to a series of…”
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Measurement of Urea in Human Serum by Isotope Dilution Mass Spectrometry: A Reference Procedure by Kessler, Anja, Siekmann, Lothar

“…A reference measurement procedure is needed to demonstrate the traceability of results of urea measurements in human serum. We developed a measurement…”
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