Unilateral and bilateral laparoscopic ovariectomy of mares by electrocautery.

This research examines the use of laparoscopic ovariectomy, a surgical procedure used in horses, through electrocoagulation and fine dissection without any additional means for controlling bleeding. It found that this method was generally effective in both normal and pathological ovaries, although sometimes caused minor complications.

Research Methodology and Participants

• The research utilized twelve horses that underwent a procedure known as a laparoscopic ovariectomy. This procedure is done by making small incisions in the abdomen, then using small instruments and a camera to perform the surgery.
• Four of the horses had the operation done on both ovaries because they displayed aggressive behaviour, theorized by the researchers to be associated with the oestrus cycle, a phase similar to the menstrual cycle in humans.
• Eight of the horses had the surgery done on one ovary for the removal of a tumor known as a granulosa thecal cell tumor (GCT). This is a common type of ovarian neoplasm in horses, which can cause estrus related behavioral abnormalities.
• For each procedure, instead of traditional clamps to control bleeding, the study used electrocoagulation, a method where an electrical current is used to cauterize, or burn, blood vessels, and thereby stop bleeding.

Findings and Interpretations

• The results showed that electrocoagulation was an effective method of controlling bleeding for both normal and pathological ovaries.
• Only in one case, which involved the removal of a GCT, was there slight bleeding after electrocoagulation. In this case, endoscopic clips had to be used to control the bleeding.
• However, the procedure was not without complications. Six of the horses developed minor wound complications, though none of these required additional treatment.
• Upon long-term follow-up, it was revealed that all eight horses that had a GCT removed exhibited no abnormal behaviors. Among the four horses operated for aggressive behavior, one continued to display some aggressive behavior post-procedure.

Implications of the Research

• This research suggests that electrocoagulation can be an effective method of controlling bleeding in laparoscopic ovariectomy surgeries in horses.
• However, care must be taken to monitor for potential minor wound complications post-surgery.
• The findings also highlight the potential efficacy of laparoscopic ovariectomy as a treatment for behavioural abnormalities in horses thought to be driven by ovarian abnormalities.