Modern medicine : its theory and practice, in original contributions by American and foreign authors . not rarely affected, and, not being able to resist the high pressurecaused by the cough, dilatation occurs. When bronchopneumonia is so intense as to destroy the muscular andelastic fibers on which the strength of the bronchial wall depends, there isalso at the same time such inflammation of the surrounding lung tissue thatit becomes sclerosed in time, so that the two lesions are associated—dilatationof the bronchi and sclerosis of the peribronchial pulmonary tissue. In generalconditions whic
Modern medicine : its theory and practice, in original contributions by American and foreign authors . not rarely affected, and, not being able to resist the high pressurecaused by the cough, dilatation occurs. When bronchopneumonia is so intense as to destroy the muscular andelastic fibers on which the strength of the bronchial wall depends, there isalso at the same time such inflammation of the surrounding lung tissue thatit becomes sclerosed in time, so that the two lesions are associated—dilatationof the bronchi and sclerosis of the peribronchial pulmonary tissue. In generalconditions which lower the vital resistance of the organism, there is greaterprobability that bronchopneumonia will cause dilatation of the bronchiand sclerosis of the peribronchial lung tissue. Such conditions are metwith in alcoholics, the poor with insufficient food and unsanitary surround-ings, and in rachitic subjects. These conditions greatly lower the vitality ofthe tissues, lessen their reaction to irritation and their power of repair, andso favor the termination of acute in chronic processes. Fig. 30. Section of lung showing dilatation of the bronchioles. (Transactions of the PathologicalSociety of London, vol. liii.) Dilatation of the bronchi may, how^ever, occur as an acute process andbe general throughout both lungs. Fletcher^ reports such a casein a child,aged three years, who died nineteen days after the onset of bronchitis. Aweek after the onset the breathing was very short and cough painful andexcessive. On admission the child was fat, but had slight signs of temperature was normal and the respirations from SO to 90 per cough was short and severe; the movements of the chest free and equal;there was no inspiratory recession; crepitant andrhonchial rales were audibleall over both lungs. The percussion note was normal. At the autopsythe lungs were voluminous, their surfaces densely studded with transparentbullfe in size from a pinhead to a small pea, but
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