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KMID : 1143620160200010037
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Korean Journal of Nuclear Medicine Technology
2016 Volume.20 No. 1 p.37 ~ p.41
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Availability of Statistical Quality Control of Nuclear Medicine Blood Test Using Population Distribution
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Chun Jun-Hong
Cho Eun-Bit
Yoon Seon-Hee
Kim Nyun-Ok
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Abstract
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Purpose : The importance of quality control by the error to a minimum, which for the purpose of enhancing the reliability
of the examination is not be emphasized excess. Currently, most nuclear medicine laboratory are conducting the internal and external quality control, and they are applying the Levey-Jennings or Westgard Multi-Rules by using the commercialized quality control materials. The reliability of the nuclear medicine blood test which affects the diagnosis of patients and the treatment policy is being secured through this quality control activity. Therefore, researchers will evaluate the utility of the statistic quality control using the population distribution of the nuclear medicine blood test conducted targeting the checkup examinees by the additional technique of the reliability improvement.
Materials and Methods : A statistic analysis was performed about 12 items of the nuclear medicine blood test targeting 41,341 peoples who used the health screening and promotion center in Asan Medical Center from January, 2014 to December, 2014. The results of 12 items of the nuclear medicine blood test was divided into the monthly percentage of three groups: within reference values, over reference, and under reference to analyze the average value of the
population distribution, standard deviation, and standard deviation index (SDI).
Results : The standard deviation of the population distribution mostly showed a result within ±2SD in all groups. However, When the standard deviation of the population distribution represented a result over ±2SD, it was confirmed SDI was showing a result of SDI > -2 or SDI > 2. As a result of analyzing the population distribution of 12 items(AFP, CEA, CA19-9, CA125, PSA, TSH, FT4, Anti-Tg-Ab, Anti-TPO-Ab, Calcitonin, 25-OH-VitD3, Insulin) of the nuclear medicine blood part basic test, when SDI of the monthly percentage which deviated from the reference values was over ±2.0, CA19-9
September was 2.2, Anti-Tg-Ab may was 2.2, Insulin January was 2.3, Insulin March was 2.4. It was confirmed these cases were attributed to the abnormality of the test reagent (maximum combination rate of isotope reagent declined) and the decline of the test response time.
Conclusion : The population distribution includes the entire attribute which becomes the study object. It is expected the
statistic quality management using the population distribution which was conducted targeting the checkup examinees by dividing into three groups: within reference values, over reference, and under reference by means of this characteristics will be able to play a role of complementing the internal quality control program which is being carried out in the laboratory.
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KEYWORD
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population distribution, standard deviation, standard deviation index (SDI)
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