Hand-assisted laparoscopic ovariectomy and colpotomy in standing mares.

This research article studies the viability of a surgical method to remove both ovaries (ovariectomy) in standing mares using hand-assisted laparoscopic surgery through a vaginal incision (colpotomy). The results show that this surgical process is technically feasible, safe, and effective for small- to average-sized horses.

Study Methods and Objective

• The primary objective of the study was to determine the feasibility of performing an ovariotomy using hand-assisted laparoscopic surgery via colpotomy in standing mares, aiming to mitigate the need for general anesthesia.
• The research involved mares aged between 2 and 21 years, weighing between 312 kg and 582 kg. After an initial trial consisting of 6 mares, the technique was applied to a further 15 mares.
• The procedure involved making two laparoscopic portals in the left paralumbar fossa to identify and manipulate the ovaries. The ovarian pedicles were transected, and the hemostasis was achieved using a LigaSure Atlas™ device or a chain écraseur. Once removed, the ovaries were taken out through a vaginal incision by an assistant.

Results

• In the majority of cases (19 out of 21), the researchers were able to locate both ovaries using the labroscopic portals created in the left side.
• In two animals, the right ovary was not reachable from the left portals due to equipment length limitations. This required the creation of additional laparoscopic portals on the right flank.
• Overall, the technique was demonstrated to be technically feasible and effective in small-to-average-sized mares.

Conclusion

• The research concluded that bilateral laparoscopic ovariectomy through two same-sided portals, aided by hand assistance via colpotomy, is a feasible, safe, and effective technique. It delivers a reliable method for performing ovariectomy without requiring general anesthesia or causing increased stress to the animal, thus enhancing animal welfare standards.