Laparoscopic techniques for investigating the equine oviduct.
Authors: Köllmann M, Rötting A, Heberling A, Sieme H
Journal: Equine veterinary journal
Summary
# Laparoscopic Techniques for Investigating the Equine Oviduct Oviduct pathology in mares remains notoriously difficult to diagnose and treat, with current options limited to invasive procedures requiring general anaesthesia or surgical flank access. Köllmann and colleagues evaluated two laparoscopic approaches—transvaginal and flank-based—for catheterising the oviduct and performing diagnostic flushing in standing, sedated mares, using methylene blue solution and post-operative hysteroscopy to confirm fluid passage into the uterus. The transvaginal approach proved inadequate, achieving only limited visualisation of the infundibulum (7 of 8 cases on the left side) without reliable catheterisation of the abdominal ostium. In contrast, the flank laparoscopic approach successfully catheterised the ampulla in 7 of 11 cases, with fluid reaching the uterus confirmed in 5 of these 7 cases. For reproduction specialists and stud veterinarians, this technique offers potential as a minimally invasive diagnostic and therapeutic tool for oviductal disorders whilst also opening possibilities for embryo collection and gamete intrafallopian transfer (GIFT), though the protocol would benefit from refinement to increase success rates before becoming routine practice.
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Practical Takeaways
- •Flank laparoscopy offers a practical minimally invasive alternative to exploratory surgery under general anesthesia for diagnosing and treating oviduct disorders in mares
- •Transvaginal approach is not recommended for oviductal flushing due to poor visualization of the abdominal ostium and limited catheterization capability
- •This technique could enable safe oviductal flushing therapy, embryo collection, and gamete transfer (GIFT) in standing sedated mares, reducing anesthesia risks
Key Findings
- •Transvaginal laparoscopic approach achieved infundibulum visualization in 6-7 of 8 cases but failed to achieve adequate opening or catheterization
- •Laparoscopic flank approach successfully catheterized the ampulla in 7 of 11 cases with fluid passage to uterus confirmed in 5 of 7 cases
- •Flank laparoscopy in standing sedated mares permits minimally invasive investigation and flushing of oviducts without general anesthesia