III. OPERATIONS ON THE TRUNK, ABDOMINAL 

 AND GENITAL ORGANS 



19. PTTNCTURE OF THE CHEST 



fig. 28 



Object. The relief of hydrothorax or pyothorax. 



Instruments. Razor, scissors, trocar, i m. of rubber 

 tubing of the same size as the trocar, vessel for receiving 

 the escaping fluid, dressing material. 



Technic. Operate upon the standing animal, the point of 

 operation in the horse being the seventh intercostafspace 

 on the left side, and the sixth on the right. Dogs may be 



FIG. 2S 



Puncture of the chest ; puncture of the intestine. 



laid upon the table. The anterior ribs are so covered by 

 the shoulder that they cannot be counted fifom before back- 

 ward and must be enumerated from behind forward. In. 

 the horse there are usually eighteen ribs and in the dog 

 fourteen. Counting 1 1 or 12 intercostal spaces from behind,. 



