Ключевые слова: adequate, air, background, ball, balls, blue, breath, breathing, care, deep, device, difficult, encourage, health, hospital, incentive, inhalation, isolated, lung, male, man, medical, medicine, old, patient, person, pneumonia, post, postsurgery, prevent, prevention, promote, pulmonary, recovery, senior, spirometer, surgery, surgical, three, transparent, white,