G44 PROLAPSE AND INVERSION OF THE URINARY BLADDER. 



increased tension of the swelling. The condition may be mistaken 

 for an abscess, and care is required in applying treatment. 



Inversion of the urinary bladder is a condition in which the 

 bladder is turned inside out, passing through the urethra something 

 like a reversed pocket ; the accident has up to the present almost 

 always been observed in mares during or soon after parturition. 

 Gruger saw it in a mare which had shortly before aborted, and suffered 

 rupture of the perineum. Lonnecker noted inversion in mares both 

 during pregnancy and after parturition. Lanzilloti lias recorded 



Fa;. 4.38. — Inversion of the bladder in a mare. 



57 cases : 53 in mares, 1 in a cow, 1 in an ass, and 2 in sows. Esser 

 diagnosed the condition in sows, also after parturition. It therefore 

 seems that about this time the urethra is abnormally dilated, a 

 condition necessarily antecedent to inversion of the bladder. Mann 

 saw a mare in which the inversion did not occur until three weeks 

 after parturition. Rauscher speaks of a two-and-a-half year old 

 filly which suffered from inversion. Forcible dilatation of the 

 urethra in mares, practised for the removal of cystic calculus, may 

 lead to inversion if the muscles of the abdomen are powerfully 

 contracted. 



