Ключевые слова: air, allergy, asthma, blue, breath, breathing, bronchial, bronchitis, care, chronic, concept, control, copd, copy space, cough, device, disease, emergency, equipment, exhalation, function, gray, hand held, health, health care, instrument, lung, lungs, maximum, measurement, medical, medicine, meter, monitoring, object, patient, peak flow, pharmacy, pulmonary, rate, science, therapy, tool,