This handbook investigates the optimal application and interpretation of clinical and laboratory diagnostic tests to improve patient outcomes while reducing unnecessary medical procedures. Authors Drew Provan and Andrew Krentz leverage their extensive clinical expertise to provide a structured framework for medical professionals. The text argues for a patient-centered diagnostic approach, emphasizing the clinical utility of specific tests over the indiscriminate ordering of investigations. By detailing common pitfalls in result interpretation, the authors provide a methodology for evidence-based clinical decision-making.

Medical professionals frequently cite this handbook as a foundational reference for clinical practice due to its practical focus on diagnostic efficiency. Experts highlight the text's utility in bridging the gap between laboratory data and bedside clinical reasoning.