In inversion, the uterus is turned inside out and protrudes, more or less, at the opening of the vagina. Its external covering is consequently the internal membrane which lines its cavity in the natural state.

Inversion usually takes place after pupping, although it may also occur unconnected with parturition, as the result of blows, or debility of the general system.

Symptoms

A careful examination must be made. If the case be one of inversion, a rough, soft, elastic body will be felt, and, probably, seen also; when the finger is introduced between the surface of the tumour and the walls of the vagina, its progress is arrested at a height which varies with the degree of protrusion, and the turnout is found to have a short neck; an elastic catheter used in the same way is stopped in its course in like manner, by a "cul-de-sac" round the tumour. Again, inversion comes on suddenly without any previous symptoms. When the inversion is allowed to remain, the surface of the uterus becomes dark coloured, soft, and gives rise to great foetor and discharge. The difficulty of returning it to its proper place is greatly increased when it is allowed to remain inverted. The tumour, by pressing upon the urethra, obstructs the flow of urine; and also causes great pain and strong efforts when the animal attempts to relieve the bowels and bladder.

Treatment

The treatment is to return the uterus to its proper site, using the gentlest possible handling and fingering. This return is always difficult, and in many cases impossible. The only alternative is to pass a ligature round the neck of the tumour; or the "ecraseur" might be tried instead. The displacement is often fatal in its results.