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1 The Thoracic Surgery Service, Hospital Sanatório Santa Maria, and Service of Cardio-Thoracic Surgery, Santa Casa da Misericórdia.
After a critical study of the different contrast media in current use in bronchography, the advantages of replacing them with a compound of barium sulphate and methylcellulose, using physiologic saline as a vehicle are emphasized. In the dosage and concentration recommended, the product opacifies the whole bronchial tree, without penetrating into the alveoli, and is readily eliminated by ciliary action and by coughing. Besides these advantages, it has proved in 25 clinical cases to be an entirely non-toxic agent, well tolerated by the respiratory mucous membrane and extraordinarily cheaper than the other products used in bronchography.
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