2020, Cilt 18, Sayı 1, Sayfa(lar) 017-025 |
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Evaluation of Rejected Sample Rates Using Six Sigma Method |
Şeniz Korkmaz |
Karacabey Devlet Hastanesi, Tıbbi Biyokimya, Karacabey, Türkiye |
Keywords: Preanalytical phase, six sigma method, quality indicator |
Aim: In this study, we aimed to evaluate the preanalytical process performance by six sigma method
and make the necessary arrangements according to the obtained results in our laboratory.
Materials and Methods: The total number of samples, and rejected samples were obtained
retrospectively from Hospital Information Management System (HIMS) in Karacabey State Hospital
Central Laboratory between January-June 2019 period. Data analyzed according to the reasons, the
quality indicator (QI) error rates were determined and sigma values were calculated monthly.
Results: Our laboratory accepted 91559 samples in six months time interval and 1902 of them were
rejected. QI error rate was determined as 2,08%. Process sigma level was calculated as 3,6. The pareto
analysis revealed that the most common causes of rejection were respectively hemolysed, clotted and
insufficient samples.
Conclusion: Most of the errors in the preanalytic phase were determined to be caused by inaccuracies
in the blood collection process. Therefore it was planned to provide repeated trainings on preanalytical
errors and blood collection for nurses, blood collection unit workers and laboratory technicians. In this
way, it was thought that we could serve the desired standards by reducing the errors in the preanalytical
process.
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