Materia medica and therapeutics : for physicians and students . he thyroid gland. 5. The injection of medicines into the Veins has been occasion-ally practiced. The operation is, however, objectionable, fromthe danger of introducing air into the circulation; and it isseldom resorted to, except in the case of transfusion of bloodafter uterine or other hemorrhage, or exhausting disease. Transfusion will often be found an efficient remedy, althoughthere is always risk of coagulation of the blood in the more direct and immediate the transfusion, the safer theoperation, as by Avelings app
Materia medica and therapeutics : for physicians and students . he thyroid gland. 5. The injection of medicines into the Veins has been occasion-ally practiced. The operation is, however, objectionable, fromthe danger of introducing air into the circulation; and it isseldom resorted to, except in the case of transfusion of bloodafter uterine or other hemorrhage, or exhausting disease. Transfusion will often be found an efficient remedy, althoughthere is always risk of coagulation of the blood in the more direct and immediate the transfusion, the safer theoperation, as by Avelings apparatus, which consists of an India- * Valor Terapeutico de Los Enemas de Savgre Deofribinata; Gac. Med, Cat.,1886, IX, 711. /O MATERIA MEDICA. rubber bulb, oblong in shape, and of sufficient size to containtwo fluidrachms; India-rubber tubes six or seven inches inlength attached to the extremities of the bulb; and stop-cocksattached to the outer extremities of the tubes. Also, two silvertubes ; one, bevel-pointed, called the afferent tube (seen at A), Fig. which is to be inserted into the vein in the arm of the patient;the other, round-pointed, called the efferent tube (seen at B),which is to be inserted into the vein in the arm of the donor,also a pair of fine forceps and a scalpel.* THE CLASSIFICATION OF MEDICINES. In treating the articles of the Materia Medica some writershave classified them according to their natural properties, others * The mode of operation is as follows :— First, place the apparatus in a basin of tepid water, and, while completely underthe water, for the purpose of filling it and insuring its cleanliness, compress andexpand the bulb until the air contained within the bulb and rubber tubing is com-pletely expelled. When the air has been completely expelled, and while the appa-ratus is yet remaining beneath the surface of the water, turn the stop-cocks at bothextremities of the rubber tubing in such a manner as to entirely preclude the possi-bility
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