A reference system for cortisol

Clinical Biochemistry

Volumn 31, Issue 6, 1998, Pages 483-488

  Thienpont, Linda M ^a  

^a GHENT UNIVERSITY   (Belgium)

Author keywords

Artificial matrix effects; Cortisol; Metrological traceability; Reference materials; Reference methods; Split sample measurements; Standardization; Steroid immunoassays

Indexed keywords

HYDROCORTISONE;

BLOOD SAMPLING; CONFERENCE PAPER; GAS CHROMATOGRAPHY; IMMUNOASSAY; MASS SPECTROMETRY; MEASUREMENT; PRIORITY JOURNAL; REFERENCE VALUE; STANDARDIZATION; STEROID ANALYSIS;

GAS CHROMATOGRAPHY-MASS SPECTROMETRY; HUMANS; HYDROCORTISONE; LABORATORY TECHNIQUES AND PROCEDURES; PILOT PROJECTS; REFERENCE STANDARDS;

EID: 0032145978     PISSN: 00099120     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0009-9120(98)00037-X     Document Type: Conference Paper

References (48)

1. 1. Moore A, Aitken R, Burke C, et al. Cortisol assays: guidelines for the provision of a clinical biochemistry service. Ann Clin Biochem 1985; 22: 435-54.
2. 2. Seth J. The immunoassay kit directory, series A: clinical chemistry, vol. 3: Part 2: Steroid and thyroid hormones. Pp. 534-58. Dordrecht, The Netherlands: Kluwer Academic Publishers, 1991.
3. 3. Cali JP. An idea whose time has come. Clin Chem 1973; 19: 291-3.
4. 4. Nocke-Fink L, Röhle G, Siekmann L, Breuer H. Collaborative surveys for steroid hormones in the Federal Republic of Germany. In: Wilson DW, Gaskell SJ, Kemp K, Eds. Quality Control in Clinical Endocrinology. Pp. 175-82. Cardiff, UK: Alpha Omega Publishing, 1981.
5. 5. Woodhead JS, Kemp HA, Nix ABJ, et al. The control of performance in immunoassays. In: Voller A, Bartlett A, Bidwell D, Eds. Immunoassays for the 80s. Pp. 169-84. Lancaster, UK: MTP, 1981.
6. 6. Tietz NW. A model for a comprehensive measurement system in clinical chemistry. Clin Chem 1979; 25: 833-9.
7. 7. Patterson DG, Patterson MB, Culbreth PH, et al. Determination of steroid hormones in a human serum reference material by isotope dilution mass spectrometry: a candidate definitive method for cortisol. Clin Chem 1984; 30: 619-26.
8. 8. Siekmann L, Breuer H. Determination of cortisol in human plasma by isotope dilution - mass spectrometry. J Clin Chem Clin Biochem 1982; 20: 883-92.
9. 9. Jonckheere JA, De Leenheer AP. Candidate definitive method for the determination of cortisol in human serum. Biomed Mass Spectrom 1983; 10: 197-202.
10. 10. Björkhem I, Blomstrand R, Lantto O, et al. Plasma cortisol determination by mass fragmentography. Clin Chim Acta 1974; 56: 241-8.
11. 11. Thienpont LM, De Brabandere VI, Stöckl D, De Leenheer AP. Candidate reference method for determining serum cortisol based on isotope dilution-gas chromatography mass spectrometry using heptafluorobutyrilation as derivatisation method. Anal Biochem 1996; 234: 204-9.
12. 12. Stöckl D, Franzini C, Kratochvila J, et al. Analytical specifications of reference methods. Compilation and critical discussion (From the members of the European EQA-organizers Working Group B) [review]. Eur J Clin Chem Clin Biochem 1996; 34: 319-37.
13. 13. Lawson A, Calam D, Colinet E. BCR information, Directorate-General for Science, Research and Development. The certification of cortisol in two lyophilized serum materials BCR N° 192 and 193; Report EUR 9661 EN; Brussels: BCR, 1985.
14. 14. Gaskell SJ, Collins CJ, Thorne GC, Groom GV. External quality assessment of assays for cortisol in plasma: Use of target data obtained by gas chromatography/mass spectrometry. Clin Chem 1983; 29: 862-7.
15. 15. Björkhem I, Blomstrand R, Kallner A, Lantto O. Interlaboratory evaluation of some kits for determination of plasma cortisol with special reference to accuracy. Scand J Clin Lab Invest 1979; 39(Suppl 152): 50.
16. 16. Lantto O, Lindback B, Aakvaag A, Damkjaer-Nielsen M, Pomoell U-M, Björkhem I. Assay of cortisol with a radioimmunoassay calibrated by isotope dilution-mass spectrometry. A Nordic collaborative study. Scand J Clin Lab Invest 1983; 43: 433-7.
17. 17. Gosling JP, Middle J, Siekmann L, Read G. Standardization of hapten immunoprocedures: total cortisol. Scand J Clin Lab Invest 1993; 53(Suppl 216): 3-41.
18. 18. De Brabandere VI, Thienpont LM, Stöckl D, De Leenheer AP. Three routine methods for serum cortisol evaluated by comparison with an isotope dilution gas chromatography-mass spectrometry method. Clin Chem 1995; 41: 1781-3.
19. 19. Tietz NW. Accuracy in clinical chemistry - Does anybody care? Clin Chem 1994; 40: 859-61.
20. 20. Miller WG, Kaufman HW. Matrix effects and accuracy assessment in clinical chemistry. Arch Pathol Lab Med 1993; 117: 343-443.
21. 21. Thienpont L. Meeting report: first and second estradiol international workshops. Clin Chem 1996; 42: 1122-4.
22. 22. Lasky FD. Achieving accuracy for routine clinical chemistry methods by using patient specimen correlations to assign calibrator values: a means of managing matrix effects. Arch Pathol Lab Med 1993; 117: 412-9.
23. 23. Vanderlinde RE, Bowers GN Jr, Schaffer R, Edwards GC. The National Reference System for Cholesterol. Clin Lab Med 1989; 9: 89-104.
24. 24. Thienpont LM, Van Landuyt K, Stöckl D, De Leenheer AP. Evaluation of four frequently used test systems for serum cholesterol by an isotope dilution gas chromatography-mass spectrometry candidate reference method. Clin Chem 1996; 42: 531-5.
25. 25. Thienpont L, Stöckl D, Brettschneider H. Commercial, reference method targetted, single donation serum panels - A breakthrough for harmonization of routine test systems for steroid hormones, [abstract]. Clin Chem 1996; 42(S6): S118.
26. 26. Nomenclature and definitions for use in NRSCL and other NCCLS documents-second edition; proposed guideline, NCCLS publication NRSCL8-P2. Villanova, PA: National Committee for Clinical Laboratory Standards, 1993.
27. 27. Büttner J, Borth R, Boutwell JH, Broughton PMG, Bowyer RC. International Federation of Clinical Chemistry. Approved recommendation on quality control in clinical chemistry. Part 1. General principles and terminology. Clin. Chim. Acta 1979; 98: 129F-43F; J Clin Chem Clin Biochem 1980; 18: 69-77.
28. 27. Büttner J, Borth R, Boutwell JH, Broughton PMG, Bowyer RC. International Federation of Clinical Chemistry. Approved recommendation on quality control in clinical chemistry. Part 1. General principles and terminology. Clin. Chim. Acta 1979; 98: 129F-43F; J Clin Chem Clin Biochem 1980; 18: 69-77.
29. 28. International Organization for Standardization. Vocabulaire international des termes fondamentaux et généraux de métrologie. 2nd ed. Geneva: ISO, 1993.
30. 29. International Organization for Standardization. Accuracy (trueness and precision) of measurement methods and results. Part 1: General principles and definitions, ISO 5725-1. 1st ed. Geneva: ISO, 1994.
31. 30. International Federation of Clinical Chemistry, International Union of Pure and Applied Chemistry. Approved recommendations (1978) on quantities and units in clinical chemistry. Prepared by Dybkaer R. Pure Appl Chem 1979; 51: 2451-79.
32. 31. ISO Standards Handbook. Quantities and units. 3rd ed. Geneva: International Organization for Standardization, 1993.
33. 32. Anonymous. Richtlinien der Bundesärztekammer zur Qualitätssicherung in medizinischen Laboratorien. Dtsch Ärztebl 1988; 85: A699-A712.
34. 33. Anonymous. Verzeichnis der Referenzmethoden, Referenzinstitutionen, Referenz-Laboratorien, Sollwert-Laboratorien, Ringversuchsleiter. Bundesärztekammer, Bonn, Germany 1992.
35. 34. Middle JG. The state of the art of steroid hormone assays - a UK NEQAS perspective. Comm Lab Med 1992; 1: 84-113.
36. 35. Stöckl D, Libeer JC, Reinauer H, Thienpont LM, De Leenheer AP. Accuracy-based assessment of proficiency testing results with serum from single donations: possibilities and limitations. Clin Chem 1996; 42: 469-70.
37. 36. Bacarese-Hamilton T, Cattini R, Shandley C, Howard C, Palmer R, McFarthing K. A fully automated enzyme immunoassay for the measurement of cortisol in biological fluids. Eur J Clin Chem Clin Biochem 1992; 30: 531-5.
38. 37. Middle JG. Results from a BCR-EQAS of various methods for progesterone and cortisol. Presented at the IXth European Congress of Clinical Chemistry, Krakow, Poland, 1991.
39. 38. Tietz NW, Rodgerson DO, Laessig RH. Are clinical laboratory proficiency tests as good as they can be? [opinion]. Clin Chem 1992; 38: 473-5.
40. 39. Greenberg N, Li ZM, Bowers GN. National Reference System for Cholesterol (NRS:CHOL): problems with transfer of accuracy with matrix materials. Clin Chem 1988; 34: 1230-1.
41. 40. Powers D. Overcoming the limitations of artificial clinical specimens: linkage to performance of patients' specimens, [editorial]. Clin Chem 1995; 41: 1689-92.
42. 41. Myers GL, Waymack PP. Matrix effects in biological reference materials used in the standardization of cholesterol measurements. Fresenius Z Anal Chem 1990; 338: 538-42.
43. 42. Franzini C. Commutability of reference materials in clinical chemistry. JIFCC 1993; 5: 186-93.
44. 43. Miller WG. How useful are reference materials [editorial]. Clin Chem 1996; 42: 1733-4.
45. 44. Thienpont LM, Van Nieuwenhove B, Stöckl D, De Leenheer AP. Candidate reference method for the determination of serum theophylline and its application for target-setting in external quality assessment and routine method evaluation. Clin Chem 1994; 40: 1503-11.
46. 45. Thienpont LM, Van Landuyt K, Stöckl D, De Leenheer AP. Candidate reference method for determining serum creatinine by isocratic HPLC: Validation with isotope dilution gas chromatography-mass spectrometry and application for accuracy assessment of routine test-kits. Clin Chem 1995; 41: 995-1003.
47. 46. Dybkaer R. Quantities and units for biological reference materials used with in vitro diagnostic measuring systems for antibodies. Scand J Clin Lab Invest 1996; 56: 385-91.
48. 47. Amended Proposal for a European Parliament and Council Directive (In Vitro Diagnostic Medical Devices). COM (96) 643 final/20.12.1996. Brussels: Commission of the European Union, Directorate-General Industry.