170 



SETON1NG. 



troublesome extension of the suppurative process, and is not to be 

 recommended. 



Having selected the lowest point, the skin is raised in a fold and 

 either divided with rowelling scissors (Fig. 221) or with a knife. The 



Fig. 220.— Seton 

 needle with eye 

 in head and also 

 at base. 



Fig. 221. — Rowelling scissors, 

 for making the preparatory 

 incision when inserting seton. 



Fig. 220a. 



point of the needle is then introduced, with its flat side towards the 

 skin, and the needle thrust forward, its course being carefully noted, 

 and if necessary controlled by the fingers of the left hand. The 

 needle used in France possesses a sharp point, and therefore readily 

 penetrates the skin at the end of its course ; but with the common 

 English needle it is necessary to make an incision for exit. The 



