The importance of the preanalytical stage in general urinalysis: rules for biomaterial collection, transportation conditions to the laboratory, and common errors.
Clinical case: how violation of 24-hour urine collection rules for proteinuria led to falsely low results and delayed diagnosis of nephropathy.
Examples of non-standard urine collection containers delivered to the laboratory and the impact of non-sterile containers on test results.
A clear example of gross violation of preparation rules for a flora smear test: spermatozoa found in a female sample. Preanalytical stage errors.
