328 



CANINE AND FELINE SURGERY 



Dislocation of the Stifle.— The patella is very frequently 

 displaced, the bulldog and Japanese breeds being, in the 



Fig. 204. — Position assumed when the Patella is Dislocated (PIosz). 



author's experience, 

 especially susceptible. 

 As a rule the bone is 

 displaced inwards, 

 and in puppies one 

 cause is a want of 

 development of the 

 internal ridge of the 

 lower end of the 

 femur.'- 



The patella can be 

 readily replaced, but 

 it is extremely diffi- 

 cult to retain it in 

 position. In a puppy, 



T- .. tr ui J TT J 1 IT if the internal ridge 



Fig. 205. — Healthy and Undeveloped Femur '^ 



of a Japanese Puppy which had a Dislo- at the base of the 



cated Patella, showing Entire Absence femur can be felt, or 



of the Internal Ridge.' 



Veterinary Journal, May, 1905 (Craig and Hobday). 



