Use of high-power ultrasonic shears for laparoscopic ovariectomy in mares.

This research article details a new technique of performing a laparoscopic ovariectomy in mares using high-power ultrasonic shears, providing results from a sample of 10 mares where no major complications were reported.

Methodology

• The procedure involved the administration of an epidural and local anesthesia to the mares.
• Three cannulas were inserted into each paralumbar fossa of the animals.
• The laparoscope was introduced through the dorsal cannula for visualizing the ovary.
• A grasping forceps was positioned via the ventral cannula and used to hold and adjust the position of the ovary.
• The high-power ultrasonic shears were introduced through the middle cannula and used to cut through the ovarian pedicle – the connecting tissue holding the ovary.
• The shears were closed over a segment of the pedicle and engaged until the tissue within was completely severed. This procedure was repeated until the entire pedicle was transected.
• After the excision of the right ovary, it was moved on to the left side of the abdomen. Both the ovaries were then removed through an incision in the left paralumbar fossa.

Results and Complications

• The effectiveness of using high-power ultrasonic shears for laparoscopic ovariectomy was tested on 10 mares.
• None of the mares experienced any significant complications during or after the procedure.
• However, excessive bleeding was observed with 10 out of the 20 ovaries, which required either a reapplication of the ultrasonic shears or the use of ligating clips to manage the bleeding.

Conclusion

• The research indicated that laparoscopic ovariectomy performed with high-power ultrasonic shears is potentially a safe method for mares.