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Clinical Chemistry 28: 2244-2248, 1982;
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Clinical Chemistry, Vol 28, 2244-2248, Copyright © 1982 by American Association for Clinical Chemistry

Multivariate delta check method for detecting specimen mix-up

Y Iizuka, H Kume and M Kitamura

Among laboratory mistakes, "specimen mix-up" is the most frequent and the most serious. According to the Clinical Chemistry Laboratory Error Report of Toranomon Hospital, specimen mix-up was often detected when there were many large discrepancies between the results of a test and the results of a previous test. We present here a checking method to detect specimen mix-up. The method, which we call the "multivariate delta check" method, is an extension of the "delta check" method first presented by Nosanchuk and Gottmann (Am. J. Clin. Pathol. 62:707, 1974). Clinical evaluation has demonstrated the effectiveness of the method.


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J. Suvisaari and M. Syrjala
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Copyright © 1982 by the American Association for Clinical Chemistry.