252 CHEMOTHERAPY 



5. As soon as the puncture has been made the nurse lowers the funnel 

 (Fig. 29); if conditions are satisfactory the saline in the glass tubing 

 near the needle will become blood tinged. 



FIG. 30. Third stage in the intravenous injection of salvarsan. Salvarsan solution being 

 added to the saline solution in the funnel. 



6. All pressure upon the upper arm is quickly released, the funnel is 

 again raised and the salt solution flows into the vein. This should not 

 be painful and no infiltration should form. 



7. Only then is the salvarsan solution added to the saline (Fig. 30) 

 and the funnel kept at the same high level. (It is best to have the 



