This text provides a practical introduction to peak flow measurement, its indications, uses and benefits, and associated problems.;Asthma is a very common condition affecting at least 12 per cent of schoolchildren and 5 per cent of adults. Recent guidelines proposed by the British Thoracic Society for the management of chronic and acute asthma recommend the domiciliary use of the peak flow meter to assist doctors in the management of the condition, as well as helping the patient manage his or her own asthma flow. This illustrated guide gives the doctor instructions on the correct use of the meter as well as providing information on the benefits and limitations of the test. Worked case histories and "real" examples of classical peak flow histories can be found throughout the text. It should be of use to respiratory physicians, general practitioners, practice nurses, physiotherapists and other health professionals involved in the day-to-day care of asthma patients.