The quality of haematology results depends on the entire process: sample collection, storage, transport and analysis.
Common sources of error include an incorrect blood-to-anticoagulant ratio, clotted or haemolysed samples, excessive delay before analysis, and storage at an unsuitable temperature.
In addition, the patient's physiological status, current medication, and the calibration and maintenance of the haematology analyser all directly affect the reliability of results.