Book excerpt: **Selected for Doody's Core Titles® 2024 in Respiratory Therapy** Master pulmonary function testing procedures — and prepare for PFT credentialing exams! Ruppel's Manual of Pulmonary Function Testing, 12th Edition provides comprehensive coverage of common pulmonary function tests, testing techniques, and the pathophysiology that may be evaluated by each test. It also includes information on equipment, measurement software, reference values, and quality assurance, so you can develop the testing skills you need to find and assess lung abnormalities and conditions such as asthma, COPD, and emphysema. Written by Carl D. Mottram, a well-known expert in pulmonary function procedures, this bestselling guide helps you get accurate test results every time. - Entry- and Advanced-Level objectives prepare you for success on the NBRC's Pulmonary Function Technologist credentialing examinations and follow the content guidelines of the CPFT and RPFT exam matrices from the National Board for Respiratory Care. - How To boxes provide step-by-step guidelines to performing pulmonary function tests, taking the guesswork out of completing accurate and result-producing tests. - Case studies provide problem-solving challenges for real-life patient scenarios, including each case history, PFT testing results, a technologist's comments, and questions and answers. - PFT Tips highlight and reinforce the most important pulmonary function testing information in every chapter. - Convenient study features include key terms, chapter outlines, learning objectives, chapter summary points, suggested readings, a glossary, and self-assessment questions. - Authoritative, all-in-one resource eliminates the need to search for information in other sources. - Criteria for acceptability and repeatability are included in each test section, as well as interpretive strategies to help you adhere to recognized testing standards.