go INTRA I UNO US INJECTION. 



In cattle digital compression of the jugular is not usually 

 efficient in causing distension. It is more practical to dis- 

 tend the jugular by passing a looped cord around the base 

 of the neck and drawing it tightly. The very conical neck 

 of the cow tends to cause the cord to slip forward and loosen, 

 which may be obviated by having an assistant grasp the 

 cord at the top of the neck and hold it in place. A very 

 efficient method for distending the jugular of the cow is to 

 stretch a strong cord tightly between two posts at the 

 heighth of the base of the neck, lead the animal against it 

 and secure the head firmly to a post in front of the animal 

 sufficiently tight to cause the lower part of the neck to 

 press firmly against the cord. 



Just above the point of compression the vein is the most 

 fully distended and firmly fixed. After testing the hypo- 

 dermic needle to see that it is open hold it between the 

 second and third fingers while the thumb covers its basal 

 opening and thrust it through the skin, cutaneous muscle 

 and jugular wall, in the direction of the vein obliquely for- 

 wards and upwards i to 2 cm. deep, so that the point of the 

 needle enters the vessel at its most distended part. In this 

 way it is easy to prevent injury to the median wall of the 

 vein. If the vein has been properly punctured blood will 

 flow from the needle upon the removal of the thumb. If 

 the vein is not entered at the first attempt the needle should 

 be partly withdrawn and then pushed in again in a slightly 

 different direction. 



Be careful that the hypodermic syringe contains no 

 air. The material to be injected should be zvarmed to approxi- 

 mately the body temperature. The syringe is then connected 

 with the needle and the contents slowly discharged into the 

 vein. In withdrawing the needle be careful to press the 

 skin firmly against the underlying part. The omission of 

 this precaution frequently results in the formation of a 

 subcutaneous hematome. 



