OBLIQUE INGUINAL HERNIA. 



1187 



same course as the spermatic cord. It is called external from the neck of the sac 

 being on the outer or iliac side of the deep epigastric artery. 



Internal or direct inguinal hernia does not follow the same course as the cord, 

 but protrudes through the abdominal wall on the inner or pubic side of the deep 

 epigastric artery. 



Oblique Inguinal Hernia. 



In oblique inguinal hernia the intestine escapes from the abdominal cavity at 

 the internal ring, pushing before it a pouch of peritoneum, which forms the hernial 



\Femoral artery. 

 Femoral vein. 



FIG. 760. Oblique inguinal hernia, showing its various coverings, 

 the Royal College of Surgeons.) 



(From a preparation in the Museum of 



sac (Fig. 761, A). As it enters the inguinal canal it receives an investment from 

 the subserous areolar tissue, and is enclosed in the infundibuliform process of the 

 transversalis fascia. In passing along the inguinal canal it displaces upward the 

 arched fibres of the Transversalis and Internal oblique muscles, and is surrounded 

 by the fibres of the Cremaster. It then passes along the front of the cord, and 

 escapes from the inguinal canal at the external ring, receiving an investment from 

 the intercolumnar fascia. Lastly, it descends into the scrotum, receiving coverings 

 from the superficial fascia and the integument. 



The coverings of this form of hernia, after it has passed through the external 

 ring, are, from without inward, the integument, superficial fascia, intercolumnar 

 fascia, Cremaster muscle, infundibuliform fascia, subserous areolar tissue, and 

 peritoneum. 



This form of hernia lies in front of the vessels of the spermatic cord and 



