. Inhalation in the treatment of disease; its therapeutics and practice. A treatise on the inhalation of gases, vapors, fumes, compressed and rarefied air, nebulized fluids, and powders. Of late years respirators with metallic meshes smallenough to detain the deleterious particles of dust havebeen recommended to be worn over the mouth and noseduring exposure to the injurious atmosphere. They aresometimes lightly packed with raw cotton, which detainsfine particles which pass through the meshes, while itstill permits the access of the air. Similar contrivances,impregnated with disinfectant solut
. Inhalation in the treatment of disease; its therapeutics and practice. A treatise on the inhalation of gases, vapors, fumes, compressed and rarefied air, nebulized fluids, and powders. Of late years respirators with metallic meshes smallenough to detain the deleterious particles of dust havebeen recommended to be worn over the mouth and noseduring exposure to the injurious atmosphere. They aresometimes lightly packed with raw cotton, which detainsfine particles which pass through the meshes, while itstill permits the access of the air. Similar contrivances,impregnated with disinfectant solutions, are sometimesemployed during exposure to poisonous atmospheres. It is often found that patients with phthisis, chronicbronchitis, or even only with delicate respiratory mucous 376 MEDICATED ATMOSPHERES. membrane, are unable to face the open air on inclementand windy clays. Sometimes patients are unable towithstand the changes of temperature, even on daysthat promise to be pleasant. Under such circumstancesthey are compelled to keep the house, or to muffle themouth and nose with a handkerchief, veil, or somethingof that kind when they go out into the open air. The Fig. Oro-nasal Eespirator. temperature of the air is modified by the warmth of thecomforter, maintained by the air of expiration; while atthe same time, if too rich in oxygen, its pungency ismoderated. Unmitigated sunlight is sometimes too irri-tating to sore eyes; and in like manner unmitigatedatmospheric air is sometimes too irritant to sore throats,bronchi, and lungs. In Great Britain a respirator offine metallic netting covered with silk is much used,and if properly appreciated, would be much used in thiscountry also. Some respirators are made merely to MEDICATED ATMOSPHERES. 377 cover the mouth, so as to encourage nasal or normalrespiration, and others (Fig. 29) to cover both mouthand nose. These appliances are unsightly, but their useoften enables patients to take regular outdoor exercise,in carriage o
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