98 



TROCARS. 



for sawing by removing the periosteum with a periosteotomy or a 

 chisel or gouge, Figs. 126-7. Files and rasps are sometimes used 

 to remove sharp edges or projecting points from sawn surfaces. In 

 this connection, the sharp spoon or curette, Figs. 128-130, used for 

 scraping diseased bones and cartilages, unhealthy granulations, callous 

 walls of sinuses, etc., deserves mention. It is not sufficiently valued 

 in veterinary surgery. It consists, as the name indicates, of a small 

 steel spoon with a sharp edge attached to a stem or handle. The 



Fig. 123.— Trocar for 

 tapping the chest. 



Fig. 124.— Trocar for 

 tapping boweJ. 



Fig. 125.— Trocar for 

 puncture of rumen. 



most useful are the smaller because they can readily be passed into 

 sinuses, in certain cases into bones, and into any hollow space. A 

 selection of various sizes ought, however, to be kept. Curettes are 

 sometimes formed with hollow handles, and an arrangement by 

 which a stream of disinfecting fluid can be caused to flow from the 

 bottom of the spoon, Fig. 130 ; the material loosened is washed 



