Pre-Analytical Errors at the Hematology Bench and Prevention

Pre-analytical errors remain a major challenge in hematology laboratories because they can compromise specimen integrity, distort test results, and adversely affect clinical decision-making. This article examined common pre-analytical errors occurring at the hematology bench during the post-collection to pre-analysis phase and discussed practical strategies for their prevention. The article identified hemolysis, clotted samples, incorrect blood-to-anticoagulant ratios, delayed sample processing, specimen mislabeling or patient misidentification, inadequate mixing of blood samples, improper storage conditions, and sample contamination or dilution as major sources of pre-analytical errors. These errors may result from improper specimen handling, inadequate adherence to standard operating procedures, human factors, transportation delays, and weaknesses in laboratory systems. Their effects include falsely altered hematological parameters, unreliable complete blood count results, increased specimen rejection, repeat testing, diagnostic errors, delayed treatment, increased healthcare costs, and potential risks to patient safety. The article further highlighted preventive measures including strict adherence to standard operating procedures, continuous staff training and competency assessment, accurate patient identification and barcoding, timely specimen transportation and processing, appropriate sample mixing and storage, and effective quality control and quality assurance systems. Automation, laboratory information systems, error monitoring, root cause analysis, and improved communication among healthcare professionals were also identified as important quality improvement strategies. Ultimately, effective control of the pre-analytical phase is essential for maintaining specimen integrity, improving the accuracy and reliability of hematological investigations, and supporting safe and effective patient care.