180 



SURGICAL ANATOMY OF 



same as those of the cord viz., from without inwards : 

 (1.) Integument. (2.) Superficial fascia. (3.) Interco- 

 lumnar fascia. (4.) Cremaster muscle. (5.) Infundibu- 

 liform fascia. (6.) Subserous cellular tissue. (7.) Peri- 

 toneum (sac). If the intestine passes into the scrotum, 

 it is called complete; if retained in the canal, incomplete, 

 or bubonocele. 



In cases of strangulation, the constriction is due to 

 some portion of either of the rings, or if in the canal, to 

 the fibres of the internal oblique or transversalis, and 

 any incision for the relief of the stricture should be 

 made upwards, to avoid wounding the deep epigastric 

 vessels or spermatic cord, which in this form of hernia 

 lie, the former to the inside of the neck of the sac, and 

 the latter directly behind it. 



FIG. 28. 



FIG. 29. 



FIG. 28 Diagram of a congenital hernia, the sac being continuous with the 

 tunica vaginalis testis. (HEATH.) 



FIG. 29. Diagram of an infantile hernia, showing the tunica vaginalis pro- 

 longed in front of the sac. (HEATH.) 



Varieties. Oblique inguinal hernia is liable to varie- 

 ties, known as congenital, infantile, and encysted. In 

 the congenital form, the pouch of peritoneum which ac- 



