Journal Article
Study

Preanalytical errors in primary healthcare: a questionnaire study of information search procedures, test request management and test tube labelling.

Söderberg J, Brulin C, Grankvist K, et al. Clinical chemistry and laboratory medicine. 2009;47:195-201.

Most errors in laboratory medicine occur in the preanalytical phase, that is, before the sample reaches the laboratory. This survey found that phlebotomists frequently do not follow recommended procedures to minimize labeling and documentation errors.