Pyometra, Canine - contd.
Prognosis following ovariohysterectomy, or spay, is good if there is no uterine rupture or other source of contamination. Mortality is less than 10 percent. If there is gross contamination of the abdomen, then open peritoneal drainage is indicated. These patients will certainly be hospitalized for longer periods of time, with a need for intensive care. The prognosis for such patients is guarded.
Dogs with an open cervix that are treated medically with prostaglandin generally have a good response to treatment, with complete resolution of infection in 75 to 90 percent of cases. In contrast, only 25 to 30 percent of dogs with closed cervix pyometra demonstrate complete resolution of signs. The majority of patients will require a second series of injections. Unfortunately, recurrence is common. Perhaps 80 percent of dogs treated medically will have a recurrence of pyometra. Ovariohysterectomy is then advised.
Following medical treatment of pyometra, to increase the chances of conception, the patient should be bred during the next estrus or heat. Pregnancy may also protect against recurrence of pyometra.
