This is a comprehensive and up-to-date overview of the latest lung function techniques for infants and children addressed to paediatric respiratory medical practitioners. Experienced European and North American authorities in the field of pediatric pulmonology provide an essential tool for fellows, paediatricians and paediatric pulmonologists caring for patients with pulmonary diseases. This book is extensive, comprehensive and practical for the clinical setting as it: Covers all lung function tests with extended analysis of reference equations and Z-score evaluation; Provides practical guidance on the interpretation of functional pulmonary tests and evaluation examples, demonstrating what information is critical for everyday clinical application; Introduces novel techniques such as ventilation inhomogeneity, while details such as exhaled nitric oxide and exhaled breath condensates are comprehensively analysed; Includes indications and interpretations of analyses of blood gases, hemoglobin saturation, capnography and acid-base balance; Contains a chapter on the selection and use of each pulmonary function test as applied in the clinical investigation of patients with respiratory problems.