Výsledky vyhledávání - "Marcel Volmer"

Reference Values for Aldosterone–Renin Ratios in Normotensive Individuals and Effect of Changes in Dietary Sodium Consumption

Autor: Jan Koerts, Anneke C. Muller Kobold, Marcel Volmer, Michiel N. Kerstens, Wim J. Sluiter, Robin P. F. Dullaart

Publikováno v: Clinical Chemistry, 57(11), 1607-1611. AMER ASSOC CLINICAL CHEMISTRY

BACKGROUND Determination of the aldosterone-to-renin ratio (ARR) in blood is the preferred screening test for primary aldosteronism. Renin can be measured as the plasma renin activity (PRA) or the plasma renin concentration (PRC). Consequently, the A

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8b02212834c54d0e8be36f769eb83aa
https://doi.org/10.1373/clinchem.2011.165662

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Infrared Analysis of Urinary Calculi by a Single Reflection Accessory and a Neural Network Interpretation Algorithm

Autor: Marcel Volmer, Jules C. M. de Vries, H.M.J. Goldschmidt

Publikováno v: Clinical Chemistry. 47:1287-1296

Background: Preparation of KBr tablets, used for Fourier transform infrared (FT-IR) analysis of urinary calculus composition, is time-consuming and often hampered by pellet breakage. We developed a new FT-IR method for urinary calculus analysis. This

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0bfe6973c4762a169d5a6bc4f6e44f2e
https://doi.org/10.1093/clinchem/47.7.1287

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Investigation of applicability of a mid-infrared spectroscopic method using an attenuated total reflection accessory and a new near-infrared transmission method for determination of faecal fat

Autor: Marcel Volmer, B.G. Wolthers, Anneke W. Kingma, Peter C F Borsboom, Ido P. Kema

Publikováno v: Annals of Clinical Biochemistry, 38, 256-263. SAGE Publications Inc.

In many laboratories, the titrimetric method of Van de Kamer is used for the analysis of faecal fat content of patients suspected of steatorrhoea. We investigated the applicability of a mid-infrared (MIR) spectroscopic method, using an attenuated tot

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39e3993d0ebc0a82f2fdb6d6e5f413cd
https://doi.org/10.1258/0004563011900489

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Creatine Kinase MB, Troponin I, and Troponin T Release Patterns after Coronary Artery Bypass Grafting with or without Cardiopulmonary Bypass and after Aortic and Mitral Valve Surgery

Autor: Marcel Volmer, Jan G. Grandjean, Anne H. Epema, Massimo A. Mariani, Piet W. Boonstra, Bert G. Loef, Joost C.J.M. Swaanenburg

Publikováno v: Clinical Chemistry, 47(3), 584-587. AMER ASSOC CLINICAL CHEMISTRY

Perioperative acute myocardial infarction (AMI) is a serious complication of cardiac surgery, leading to increased morbidity and mortality (1). Currently, the diagnosis of AMI is based on changes in the electrocardiogram and increased release of bioc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89506f1ccc80b8f2b4df842ca1ded516
https://doi.org/10.1093/clinchem/47.3.584

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Growth and survival of low birthweight infants from 0 to 9 years in a rural area of Ghana. Comparison of moderately low (1501-2000 g) and very low birthweight (1000-1500 g) infants and a local reference population

Autor: J. van der Mei, Marcel Volmer, E. R. Boersma

Publikováno v: Tropical Medicine and International Health. 5:571-577

This prospective and descriptive study was conducted to evaluate the growth and survival of 105 low birthweight (LBW, 1,000-2,000 g) infants discharged during a 4-year period from Agogo Hospital, Ghana, and followed from birth until the age of 4-9 ye

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9603634fc711bdc9e8d5d15627152fd8
https://doi.org/10.1046/j.1365-3156.2000.00604.x

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New method for faecal fat determination by mid-infrared spectroscopy, using a transmission cell: an improvement in standardization

Autor: P de Peinder, Dorine W. Swinkels, M M J Joosting, S Donkervoort, Bg Wolthers, M T W Hofs, Marcel Volmer, H A M Voorbij, B S Jakobs

Publikováno v: Annals of Clinical Biochemistry, 37, 343-349. SAGE Publications Inc.

Current techniques used in clinical laboratories for faecal fat determination, such as the Van de Kamer method, are not very accurate or precise. This became apparent when results obtained by different laboratories were compared, and could explain th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::119739f9b8900fe5c36a290bc4bd3343
https://doi.org/10.1258/0004563001899258

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Predictive Value of Cord Blood Hematological Indices and Hemoglobin Barts for the Detection of Heterozygous α-Thalassemia-2 in an African-Caribbean Population

Autor: Reind van Veen, Fey P. L. van der Dijs, Jan W. Smit, Frits A. J. Muskiet, Dieuwke G. van Gijssel-Wiersma, Marcel Volmer

Publikováno v: Clinical Chemistry. 45:1495-1500

Background: Cord blood hemoglobin Barts (HbBarts) and hemocytometric indices may be used for classification of newborns into those without α-thalassemia-2 (αα/αα) and with heterozygous α-thalassemia-2 (-α3.7/αα). We investigated by logistic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16419815dec9a8e630eb2afb7d844af9
https://doi.org/10.1093/clinchem/45.9.1495

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Evaluation of urinary metanephrine and normetanephrine enzyme immunoassay (ELISA) kits by comparison with isotope dilution mass spectrometry

Autor: Marcel Volmer, Bernhard Manz, Reinhard Wesemann, Ido P. Kema, B.G. Wolthers, Jürgen Westermann

Publikováno v: Clinical Chemistry, 43(1), 114-120. AMER ASSOC CLINICAL CHEMISTRY

Determination of urinary 3-O-methylated catecholamines (metanephrines) is generally considered a principal test for the clinical chemical diagnosis of pheochromocytoma and is currently performed predominantly with chromatographic techniques such as g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49a91420a8bbe98c8d3f1cd3cc717cea
https://doi.org/10.1093/clinchem/43.1.114

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Artificial neural network predictions of urinary calculus compositions analyzed with infrared spectroscopy

Autor: W. Van Der Slik, P. M. J. Coenegracht, H. J. Metting, T. H. Y. De Haan, Bg Wolthers, Marcel Volmer

Publikováno v: Clinical Chemistry. 40:1692-1697

Infrared (IR) spectroscopy is used to analyze urinary calculus (renal stone) constituents. However, interpretation of IR spectra for quantifying urinary calculus constituents in mixtures is difficult, requiring expert knowledge by trained technicians

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9a1e5f41395b2bc9f1bed031d4f386a2
https://doi.org/10.1093/clinchem/40.9.1692

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