INGUINAL OPERATION ON CRYPTORCHIDS. 243 



placed in one and the ligatures and needles in the second ; the third is 

 used by the operator for moistening his hands before introducing them 

 into the abdominal cavity ; in a fourth empty dish, pledgets of 

 sterilised cotton wool are in readiness. It is also well to have at hand 

 a vessel with a lip, to use as an irrigator. 



All being ready, the animal is chloroformed, during which time the 



I.e. I.e. 



O.C. 



■+ 



"l.-n--^- 



\ 



Fig. 253. — Inguinal canal, viewed from the flank. The external lip of the left 

 inguinal ring has been removed. The aponeurosis of the external oblique 

 abdominal muscle has been cut through a little in front of the spot where it 

 divides. The inner oblique abdominal muscle has been separated from 

 Poupart's ligament to a point near the inner commissure of the inguinal canal, 

 p. Poupart's ligament, o.aa. Obliquus abdominis internus muscle, i.e. i.e. 

 Inner commissure of the inguinal canal. a.o..\.e. Aponeurosis of the obliquus 

 abdominis externus muscle divided and reflected, i.e. Inner commissure of 

 the lower abdominal ring. o.c. Outer commissure, divided, a.l. Anterior lip. 

 P.L. Posterior lip. U..A.R. The dotted line indicates the position of the upper 

 abdominal ring. o. The dotted line indicates the position in which the open- 

 ing is made in operating for abdominal cryptorchidism. H. Hind limb, 

 abducted. 



V: 



seat of operation is scrubbed with soap and water, washed with ether 

 or turpentine, and disinfected with carbolic or sublimate solution. The 

 inguinal region, sheath, lower surface of the abdomen, and inner 

 surface of the thigh must all be included. The disinfected sheath is 

 plugged with a tampon of cotton wool. As soon as narcosis is 

 complete, the assistants holding the dishes place themselves near the 



fcxr* 



