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Destruction of corpuscles in illuminating gas poisoning, pernicious anemia. (Begin in the early stage of the disease and give repeated small quan- tities. ) Poisoning by coal-tar derivatives, by sub- stances producing methemoglobin. Pathological hemorrhage: Hemophilia, melena, neonatorum, scorbutus, purpura hemorrhagica, Henoch's purpura, obstructive jaundice with viagra usage slow coagulation time, cholemia. Obscure pathology: Idiopathic epilepsy, mental depression, chlorosis. Toxic conditions: Bacterial: Rheumatic fever viagra usage with malignant endocarditis hydrophobia; eclamp- sia, toxemia of pregnancy; tonsillitis with petechise and anemia; delirium from toxemia or severe hemorrhage; metabolic. Contraindications. — 1. Whenever hemolysis is taking place. 2. Severe infection in viagra for men for sale the cachexia of cancer. 3. Uremia. 4. Acute hyperthyroidism. 5. Diabetes. In his latest book, on viagra usage "Emotions," Crile says: "If all the brain of viagra for men for sale an animal be removed by de- capitation its body may live on for at least eleven hours if its circulation is maintained by trans- fusion, while an overtransfused animal may live many hours, days even, after the destruction of the medulla." By what method then is transfusion easily ac- complished? There are six kinds of transfusions, with three successful methods : 1. Direct method by means of: (a) Suture of vessels, (b) By the use of cannula interpolated in the blood stream, (r ) By the use of cannula bring- ing intima to intima. 2. Indirect or interrupted method: (a) Needle and syringe, (b) Receptacle, containing anti- coagulants. 3. Combination of the direct and indirect method : Valve and syringe. 4. Auto-transfusion: the driving of blood from the periphery to the center, the heart, and brain in order to maintain circulation, i.e. bandaging limbs in post partum hemorrhage. 5. Reciprocal transfusion is the exchange of an viagra for men for sale equal volume of blood between patient suffering from a febrile disease and one who is convalescing from that disease, the blood of the convalescing be- ing supposed to contain an antitoxin. 6. Peritoneal and subcutaneous injection of blood. In the direct method of transfusion a vessel of one person viagra for men for sale is united to a vessel of another viagra usage person by suture or tube. Suture of viagra for men for sale vessels, bringing intima to intima, has been practised and described by Murphy. Carrel, and Guthrie. Its advantage is that ves- sels of different sizes can be united. Before at- tempting vessel suture viagra usage it is essential for the oper- ator to acquire laboratory experience to become familiar with technical difficulties which may arise before one could feel safe of carrying out a suc- cessful transfusion. The method of interpolating a cannula in the blood stream is the procedure of Brewer and Leg- gett, who used glass paraffinized tubes. The advantages of this method are the simple technique, viagra for men for sale and that it can be used in very small vessels. The objection to its use is production of emboli, as a result of viagra usage trauma from the tubes, and as viagra usage a result of back currents due to the uneven calibers of the vessels. J. F. Corbett modifies this by the use of a gold tube, with or without rubber connections. This has the advantage of the glass tube in that it is less liable to injure viagra for men for sale the intima and is more easily re- tained. It accommodates itself to a wide range in the size of vessels. The two-piece tube of Bernheim has the advan- tage over single tubes: it can be managed by two operators, while one half is inserted in the donor, the other half can be introduced into viagra for men for sale the vessel of the recipient. Donor and recipient can be prepared in different rooms, and afterward the donor is wheeled into the recipient's room, the two are placed in opposition, and the two halves of the cannula are joined. The cannula method which brings intima to intima in contact was originated by Tansini, im- proved upon by Queirolo, again revised by Payr, and finally brought to our attention by Lepinasse and Eisenstadt. It is represented by the Crile method. This has been modified by Janeway, Ells- berg, viagra for men for sale Buerger, Soresi, and a number of others. In this method the blood vessel must be cuffed over the cannula. The operation is of a major character and difficult to perform. The direct method generally necessitates dissec- tion of the vessels for several inches; it is not as easily performed as the viagra usage description of each method viagra for men for sale makes the impression on the student ; it destroys the vessels used of both donor and recipient ; it re- quires expert surgeons to perform the operation, and does not offer scientific accuracy as to the quantity of blood transfused. Before a practical method of measuring the amount of blood flow was viagra for men for sale devised, the surgeon was compelled to rely upon clinical signs for an index of the amount of blood transfused. Blood pressure, viagra for men for sale pulse rate, appearance of the patient, time that the blood has or is supposed to have flowed, increase of