Handbook of Diagnostic Tests is the third edition of a two-part reference that provides coverage of nearly all major diagnostic procedures and laboratory tests. Part I is an alphabetical listing of over 450 disorders with their key test results. Part II groups 16 chapters of lab tests and diagnostic procedures by type. Test entries in Part II include description, purpose, procedure steps, normal test results and reference values, and disorders indicated by abnormal test results. Part II also includes patient preparation, posttest care, precautions, and interfering factors. Thirty diagnostic tests are new in this edition and all existing tests have been updated. Appendices include normal and abnormal serum drug levels for substance abuse screening and therapeutic monitoring and an illustrated guide to patient self-testing.