Laboratory tests are valuable in diagnosis and treatment – but are usually more informative than diagnostic, so need to be used in conjunction with history and physical.
Rising cost of heathcare raises questions about necessity of many laboratory tests need strategies to optimise use of the tests. Indiscriminate use of laboratory tests inconvenience to patient and increases cost of care.
Normal values- need to be checked against locally accepted norms
• diagnostic assistance
Only form of communication for requesting a test accuracy essential. Used to request specific test(s) and includes patient information (name, ID number, date of birth, clinicians name)