Society of Turkish Biochemistry, Ankara, 2020
As technology progresses, automatic analyzers substitute manual procedures and reduce analytical errors. However, as the number of test orders in
hospitals and correspondingly as the number of sample accessioning in medical
biochemistry laboratories increase, preanalytical phase of the total continuum
becomes more inclined to errors. At present, vast majority of errors affecting test
results occur in preanalytical phase (1). Among the tests studied, one of the most
measured tests is complete blood count (CBC). Therefore, CBC is one of the
tests which are numerically affected by the preanalytical errors (2). Management
of preanalytical phase is difficult due to the need of participation of divisions
other than the laboratory. Knowledge about variables impacting CBC test has a
great importance for preventing preanalytical errors. Developing and complying
with the instructions related to this issue are included in the responsibilities of the
laboratory management. This reference document is prepared with the purpose
of performing a useful, practical and applicable guideline for all medical laboratory staff, nurses, phlebotomists, students and researchers.