Preanalüütiline

Preanalüütiline refers to the stage or process that occurs before analysis. In scientific and medical contexts, it specifically encompasses all the steps that take place from the moment a sample is collected until it is ready for testing or examination. This includes sample collection, transportation, storage, and preparation. Proper preanalytical procedures are critical for ensuring the accuracy and reliability of subsequent analytical results. Errors introduced during the preanalytical phase can lead to erroneous diagnostic conclusions, even if the analytical testing itself is performed perfectly. Factors such as sample integrity, proper labeling, and adherence to specific handling protocols are paramount. For instance, in clinical chemistry, the type of anticoagulant used, the time elapsed between collection and centrifugation, and the temperature of storage can all significantly impact the measured concentration of various analytes. Similarly, in microbiology, maintaining the viability of microorganisms during transport and storage is essential for accurate identification and susceptibility testing. Therefore, a well-defined and rigorously followed preanalytical workflow is a cornerstone of good laboratory practice and contributes directly to patient safety and effective healthcare.