Practice of medicine : a manual for students and practitioners . affectedportion of the lung. During life, atelectasis may be overshadowed by the symp-toms of the disease or condition which causes it. Treatment should address the cause, in the hope of preven-tion of complete atelectasis, which is incompatible with life. Fig. 33. (EDEMA OF THE LUNG Pulmonary CEdema). Definition: A collection of fluid in the interstitial tissue ofthe alveoli and smaller bronchioles. The fluid comes fromthe blood, through the vessel-walls,and may be clear or tinged with blood. Etiology : Passive congestion of the
Practice of medicine : a manual for students and practitioners . affectedportion of the lung. During life, atelectasis may be overshadowed by the symp-toms of the disease or condition which causes it. Treatment should address the cause, in the hope of preven-tion of complete atelectasis, which is incompatible with life. Fig. 33. (EDEMA OF THE LUNG Pulmonary CEdema). Definition: A collection of fluid in the interstitial tissue ofthe alveoli and smaller bronchioles. The fluid comes fromthe blood, through the vessel-walls,and may be clear or tinged with blood. Etiology : Passive congestion of thelung, due to a weak heart, is probablythe most common cause. (Edema occurring in nephritis isdue to changes in the vessel-walls orin the heart, weakness, (Edema mayoccur in the neighborhood of in-flammatory processes in the lung. Symptomatology: The onset maybe sudden or gradual. There aredyspnoea, cyanosis, and increased fre-quency of respiration. Rdles occur, at first with resonance,later with dulness or flatness over the more dependent portionsof the QCdema pnlmnniim. Desqua-mated epithelial cells con-taining particles of coal-dust(Whittaker). GANGRENE OF THE LUNG. 283 The sputum contains cedematous cells, known as cells ofpulmonary oedema or the cells of heart-failure (Fig. 33). Thesputum may contain urea in cases occurring in nephritis. The prognosis is always grave, but depends upon the cause,especially upon the reaction of the heart to stimulation. Pulmonary oedema—treatment: Most cases are due to a weakheart, which should be strengthened by rest and the judicioususe of cardiac stimulants and exercise. Grave cases may callfor the analeptics, probably best, camphor and oil, 1 : 8, hypo-dermatically. Often considerable comfort is secured by theuse of morphine. ABSCESS OF THE LUNG. Abscess of the lung may be single or multiple. Etiology: Among the causes of abscess of the lung are:tuberculosis, pneumonia, empyema, mediastinitis, oesophagealcarcinoma, abscess of the
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