Covering some 550 laboratory and diagnostic tests, this guide provides medical professionals with information on preparation, administration, analysis, and communication of tests performed on blood, urine, and various body systems. Entries cover the purpose of the test, patient preparation, special equipment, posttest care, normal findings and reference values, and factors that can throw off the test. Also included are a number of appendices providing information on fluid collection techniques, the selection of containers, special considerations for elderly patients, drug interference indications, and other pertinent information.