ADMINISTRATION OF SALVARSAN AND NEOSALVARSAN 801 



glass or other insoluble particles. For administration any simple ap- 

 paratus, such as that shown in Fig. 143, answers all purposes. 



Neosalvarsan can also be given intravenously in a concentrated form 

 by dissolving the drug in 20 c.c. of sterile distilled water. It is injected 

 by means of an ordinary glass syringe or by the special syringe devised 

 for this purpose shown in Fig. lS5. 



Injecting Apparatus. A number of different apparatus for the ad- 



FIG. 143. METHOD OF MAKING INTRAVENOUS INJECTION BY GRAVITY. 

 This method is suitable for the intravenous administration of salvarsan or anti- 

 streptococcus serum, etc. The needle has been entered into a prominent vein 

 (indicated by a flow of blood) ; the tubing has been attached by means of a metal 

 tip which fits the needle easily and snugly; the tourniquet has been loosened and the 

 injection is being given. 



ministration of salvarsan and neosalvarsan have been invented and 

 marketed. That shown in Fig. 142 is well adapted for the purpose; one 

 cylinder carries sterile normal salt solution and the second holds the 

 salvarsan or neosalvarsan solution. By fastening the cylinders to an up- 

 right rod attached to the side of the table their height may be adjusted 

 as desired, and by means of the special cock the operator may insert the 

 needle and allow the salt solution to flow in until he is sure of having 

 satisfactorily penetrated the vein, when he may turn on the salvarsan 

 51 



