Page 13 - Poster presentation KVAC 22
P. 13
nd
The 22 KhonKaen Veterinary Annual International Conference “Transboundary Animal Diseases (TADs)”
Transcutaneous Ligation of Vas Deferens
for Preparation of Teaser Bucks
1*
2
Sarawut Sringam , Nittaya Boonbarn , Patchnee Sringam 3
1 Unit of Theriogenology, Faculty of Veterinary Medicine, Khon Kaen University
2 Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Khon Kaen University.
3 Unit of Physiology, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
* Corresponding author Email: sarsri@kku.ac.th
Case Description After surgery, the wounds did not show incidents of
swelling or edema. The libido of both bucks remained.
Two bucks, one-year-old, weighing 25 and 28 kg, were
Ultrasonography was performed one month after the
subjected to study at Veterinary Teaching Hospital, Khon
Kaen University. The owner wanted to use the goats as surgery. We found that three of the four ligation sites
showed strictures of vas deferens. Only one from 4 ligation
teasers. Transcutaneous ligation of vas deferens was
sites was not completed. To examine the semen
performed on these bucks.
ejaculation, bucks were ejaculated using electro-
Treatment and Outcome ejaculation at 1, 3, and 6 months after surgery. Seminal
The bucks were sedated with Xylazine. 0.02 mg/kg IV, the plasma from the bucks were clear and there were few
animals were restrained in the right lateral recumbent sperms (total sperm <100,000 sperms) in their ejaculates,
position. The scrotum was aseptically prepared, then was the spermatozoa were non-motile.
infiltrated with the 2.5 ml of 2% lidocaine HCl, at the level
Vas deferen
of the scrotal neck on both sides, subcutaneously and Vas deferen
distributed around the spermatic cords. Testis
Transcutaneous ligation was achieved by thumbing the
spermatic cord at 3-5 cm above the pampiniform plexus to
Figure 3. Ultrasound longitudinal image of vas deferens showing
separate vas deferen far away from blood vessels. Vas
A) completed stricture (orange arrow) and B) dilatation (yellow
deferen was pressed to beneath to skin; then the surgeon
arrow) of vas deferens .
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started bite suture (Supramid 2/0) through the skin, in
held vas deferens in the loop of the needle, after that the Clinical Relevance
needle was pulled out near the first bite. So that the @ Teaser bucks are used for identifying does in estrus on
suture was forming a complete loop around the vas goat farming. Vasectomy or epididymectomy techniques
deferens and the suture ends were tied ligating it. are the best choices for sterilizing the buck to use as a
teaser. However, those techniques require aggressive
The following ligation was done 3 cm above the previous surgical intervention.
ligation. The other side of vas deferens was done the same @ Our study indicated that transcutaneous ligation of vas
as described before. The bucks received antibiotics, and deferens was simply performed, with minor skin wounds,
the sutures were removed ten days after surgery. and minimal postoperative care is needed.
@However, there are some reports in human about the
failure of vas deferens ligation and recanalization of vas
deferens after surgery but incidence of failure is put at 0-
3%.
Figure 1. The vas deferen (green @ For the confidence, the bucks should be conducted to
line) was separated from vessels
examine the sperm before used them as teasers.
(red line) by thumbing before
biting the needle. Keywords: Buck, Teaser, Vas deferens, Ligation
References
Adel MB, 2009. Percutaneous ligation of spermatic cord as an
alternative to opened castration in donkeys. Benha Vet Med 20,
24 -41.
Amin T, Behrooz N, Masood S, Maryam M, Aboutorab TN, Saeed
N, 2010. Epididymis ligation: a minimally invasive technique for
preparation of teaser rams. Vet Surg 39, 121-127.
Mellin HE, Bauer HW, Rattenhuber U, 1980. Failure following
Figure 2. Each vas deferens was fertility vasectomy. Med Welt 31, 1723-1724.
transcutaneous ligated (red Terry B, John C, 1996. Vasectomy in the ram. In Practice 18, 330-
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cross) with Supramid . 33.
