INTRAVENOUS INJECTION. 



67 



15. INTRAVENOUS INJECTION, 

 Fig. 3. 



Instruments. Scissors, hypodermic syringe. 



Technic. The operation is performed on the standing 

 animal on either jugular vein at about the juncture of the 

 upper and middle thirds of the neck ; to most operators the 

 right jugular is the more convenient. At the place desig- 

 nated the subscapulo-hyoideus muscle lies between the 

 jugular vein and the carotid artery. After clipping the hair, 

 the skin should be carefully disinfected. The vein lies in 



Fig. 3. Intravenous Injection. 



the jugular groove between the niastoido-humeralis and the 

 .sterno-maxillaris muscles covered only by the .skin and skin 

 muscle. Stand by the shoulder of the horse and compress 

 the jugular with the thumb as shown in Figure 3 or with the 

 .second to the fourth fingers, in which case the ball of the 

 thumb rests on the mastoido-humeralis muscle, in a way that 

 the vein becomes filled above the point of compression in the 



