256 



CANINE AND FELINE SURGERY 



\\'ith the fingers or per rectum, and a catheter or metal 

 sound (see Fig. 156) should be passed into the bladder. \\'ith 

 this instrument a distinct ' jar ' and a metallic ' click ' can 

 be felt when it strikes against the calculus. AMien a calculus 



Fig. 162. — Bladder Calculi in situ. 

 U, Ureter; V, vagina. 



has been discovered, surgical treatment is the only one which 

 gives a chance of permanent success. For cystitis due to 

 other conditions the cause itself must be discovered and 

 treated. If septic organisms are suspected, the bladder must 

 be washed out (see p. 252), and urotropin, buchu, creolin, 



