Preanalytical Variables

Preanalytical variables are factors that can influence the accuracy of medical test results before the actual analysis begins. These include how a blood or urine sample is collected, stored, transported, and prepared. For example, fasting before a blood test, the type of collection container used, or the time between sample collection and processing can all affect the results. Managing these variables carefully is essential to ensure test outcomes are reliable and reflect the true health status. Proper handling minimizes errors and provides accurate information for diagnosis and treatment.