Assessment and maintenance of the quality of urolith analyses in a comparison of methods. 4th international ring test to check quality

Rebentisch, G; Berg, W; Pirlich, W; Hommann, D

doi:10.1007/bf02583029

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…X-ray diffraction is also used, but it is unsuitable for the analysis of amorphous substances such as carbonate apatite. 2 Infrared spectroscopy is a reliable technique but it may produce complex spectra resulting from the interference of known biomaterial with unknown substances. 3 Thermal decomposition analysis is only suited for a few types of kidney calculi such as struvite.…”

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confidence: 99%

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Identification of human calculi with time‐of‐flight secondary ion mass spectrometry

Ghumman

Carreira

Moutinho

et al. 2009

Rapid Comm Mass Spectrometry

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Time-of-flight secondary ion mass spectrometry was used to study four human calculi and to compare the results with those from twelve commercially available urinary calculi minerals including three organic compounds (L-cystine, uric acid and sodium urate). Phase identification of calcium phosphate compounds was carried out by considering the relative ion abundances of [Ca(2)O](+) and [CaPO(2)](+). Deprotonated [M-H](-) and protonated [M+H](+) uric acid were detected and used for component recognition in pure uric acid and in the mixed samples of struvite, calcium oxalate and uric acid. Iodine related to the medical history of a patient was also detected.

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confidence: 99%

“…However, it is also the most inaccurate. X‐ray diffraction is also used, but it is unsuitable for the analysis of amorphous substances such as carbonate apatite 2. Infrared spectroscopy is a reliable technique but it may produce complex spectra resulting from the interference of known biomaterial with unknown substances 3.…”

mentioning

confidence: 99%

Identification of human calculi with time‐of‐flight secondary ion mass spectrometry

Ghumman

Carreira

Moutinho

et al. 2009

Rapid Comm Mass Spectrometry

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“…5,6 The simplicity of the sample treatment, the low cost associated with the measurements, and the usefulness of the obtained results have led infrared (IR) spectroscopy to become the reference method as well as the most widely used technique for urinary stones characterization. 7 In addition, some quantification methodologies based on IR spectroscopy have also been developed. In this regard, the most relevant bibliography describes linear quantification models based on the calculation of the ratio of single spectral bands (specific for each type of urinary stone), so most of the information on the spectra is not used into the calculations.…”

Section: Taking Advantage Of Hyperspectral Imaging Classification Of mentioning

confidence: 99%

Taking advantage of hyperspectral imaging classification of urinary stones against conventional infrared spectroscopy

et al. 2014

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The analysis of urinary stones is mandatory for the best management of the disease after the stone passage in order to prevent further stone episodes. Thus the use of an appropriate methodology for an individualized stone analysis becomes a key factor for giving the patient the most suitable treatment. A recently developed hyperspectral imaging methodology, based on pixel-to-pixel analysis of near-infrared spectral images, is compared to the reference technique in stone analysis, infrared (IR) spectroscopy. The developed classification model yields >90% correct classification rate when compared to IR and is able to precisely locate stone components within the structure of the stone with a 15 µm resolution. Due to the little sample pretreatment, low analysis time, good performance of the model, and the automation of the measurements, they become analyst independent; this methodology can be considered to become a routine analysis for clinical laboratories.

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“…Die Festlegung von SQ ergibt sich für die 5 Ringversuchsproben in Abhängigkeit von -der Komponentenanzahl pro Probe -der Zahl fehlender bzw. zusätzlich benannter Substanzen -der mittleren Abweichung (Mol-Anteile) von der Sollzusammensetzung der Probe nach einem Punktsystem (4 …”

Section: Bewertung Der Analysenergebnisseunclassified

“…Durch regelmäßige Qualitätskontroll-Ringversuche mit unterschiedlich zusammengesetzten Testproben werden die analytischen Möglichkeiten und Grenzen einzelner Analysetechniken aufgedeckt und Aussagen zur Richtigkeit der .erhobenen Befunde gewonnen (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). Die Auffindung und Diskussion von Analysefehlern soll dabei helfen, zukünftig aufmerksamer und kritischer an die Beurteilung problematischer Harnsteinzusammensetzungen heranzugehen.…”

Section: Introductionunclassified

Leistungsvermögen verschiedener Harnsteinanalysemethoden (6. Internationaler Ringversuch)

Rebentisch¹,

Berg²

1990

LaboratoriumsMedizin

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Zusammenfassung: Im Rahmen des 6. Internationalen Ringversuchs zur Qualitätsbeurteilung einzelner Harnsteinanalysemetho-•den wurden 46 nach 10 verschiedenen Verfahren erhobene Befunde aus 15 Ländern bewertet Der mittlere Qualitätsstandard SQ über alle Teilnehmer beläuft sich auf 2,15. Die mittlere Abweichung ÄX pro Komponente vom Sollwert liegt mit 0,142 Mol-Anteilen in akzeptabler Größenordnung. Sowohl SQ als auch JX widerspiegeln in der Reihenfolge der Methodenanwendung mit Röntgendiffraktion, IR-Spektroskopie und anderen eingesetzten Analysetechniken zunehmende analytische Ungenauigkeiten. Eine methodisch einheitlich standardisierte sowie zentralisiert durchgeführte Harnsteinanalyse bietet Vorteile für die Qualität der Analyseergebnisse. Schlüsselwörter: Urolithiasis -Harnsteinanalyse -Qualitätskontroll-Ringversuch Summary: In the 6th International Ring Test for the assessment of the quality of different methods of calculus analysis, 46 findings from 75 countries obtained by W different methods were assessed. With 0,142jnol parts, the mean deviation AX from the ideal value per component was within an acceptable range. SQ as well as reflect increasing analytical inaccuracy in the order of methods used from the X-RAY diffraction via infrared spectroscopy down to the other analytical techniques employed. Calculus analysis on a centralized basis with uniformly standardized methods offers advantages for the analytical results.

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Assessment and maintenance of the quality of urolith analyses in a comparison of methods. 4th international ring test to check quality

Cited by 9 publications

References 7 publications

Identification of human calculi with time‐of‐flight secondary ion mass spectrometry

Identification of human calculi with time‐of‐flight secondary ion mass spectrometry

Taking advantage of hyperspectral imaging classification of urinary stones against conventional infrared spectroscopy

Leistungsvermögen verschiedener Harnsteinanalysemethoden (6. Internationaler Ringversuch)

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