060 AMPUTATION OF THE PENIS. 



In the horse, injuries to the penis are most frequently caused 

 during prolapsus by accidental blows, as with the whip. Extensive 

 wounds are sometimes caused in stallions during coitus. In bulls, 

 injuries may likewise be caused by the penis failing to enter the 

 vagina and striking against the ischia of the cow. In such cases 

 laceration sometimes takes place, the corpora cavernosa are ruptured, 

 bleeding occurs, and marked bending and distortion ensue : the 

 condition has also been seen in the horse. Similar injuries have 

 also been caused by ignorant castrators applying a clam to the penis, 

 instead of the testicle. Lambert and Robert report such cases, 

 in one of which the testicle lay in the abdomen. As the horse 

 suffered from colic on the following night, and made fruitless efforts 

 to pass urine, the clam was removed, and recovery occurred, but 

 amputation of the penis was found necessary. In dogs, injuries 

 of the penis are caused by bites and violently separating the 

 animals during coitus. 



The first serious symptom which occurs is difficulty in urination. 

 Either the injury itself or the inflammatory swelling consequent 

 on it compresses or displaces the urethra and produces obstruction. 

 Such injuries sometimes produce cicatricial strictures. Lacerations 

 of the penis generally do well, that is, the distortion or bending 

 disappears along with the inflammatory symptoms, though cases 

 have been seen where it persisted, and rendered the animal useless 

 for stud purposes. Gallimore reports a case where the end of the 

 penis no longer became erect. 



Treatment must be based on general principles. To assist 

 circulation, and repair and prevent the wound becoming soiled, 

 a suspensory bandage is employed, and may be made the vehicle 

 for the application of cold astringent lotions, &c. ; the swelling which 

 usually remains will thus be most rapidly removed, and for the 

 same purpose massage will be found of service. 



HI.— AMPUTATION OF THE PENIS. 



The greater part of the penis consists of the corpora cavernosa, which, 

 together with the urethra and blood-vessels, are surrounded by the firm 

 fibrous tunica albuginea. At the lower border of the penis lies the urethra 

 in a furrow, surrounded by the corpus spongiosum, cavernous bodies and 

 muscles. The arteria and vena dorsalis penis form the large blood-vessels. 

 In dogs the os penis must also be considered in operating. 



In amputation of the penis, three factors are to be reckoned with, 

 viz. : — 



{a) The bleeding, (b) The after-contraction of the urethra, 

 (c) The pain. 



