Effect of patient rotation on ovary observation during laparoscopic ovariectomy in dogs

Liehmann, L.; Seny, Tanja; Dupré, Gilles

doi:10.1111/vsu.12764

Cited by 4 publications

(4 citation statements)

References 27 publications

(48 reference statements)

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“…Lateral recumbency was required for visualization of the ovaries in these guinea pigs. In dogs, there is significant improvement in visualization of the ovaries when the dogs are tilted to 45° compared with 0° and 22.5° . However, in the guinea pigs in our study, this angle did not allow visualization of the ovaries and did not provide enough ventral displacement of the gastrointestinal system away from the surgery site.…”

Section: Discussionmentioning

confidence: 54%

Laparoscopic ovariectomy in guinea pigs: A pilot study

et al. 2019

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Objective To assess the feasibility and safety of laparoscopic ovariectomy in guinea pigs utilizing 3‐mm minilaparoscopic instruments. Study design Experimental pilot study. Animals Guinea pigs (n = 3). Methods The guinea pigs were sedated, placed under general anesthesia, and intubated under endoscopic visualization. A 3‐port technique was used with a 3.9‐mm cannula for the endoscope and two 3.5‐mm cannulas accommodating 3‐mm endoscopic instruments including a 3‐mm vessel sealing device, grasping forceps, and endoscopic scissors. The abdomen was insufflated with CO2 to a pressure of 6–8 mm Hg. The guinea pigs were manually tilted 90° laterally to visualize the dorsally positioned ovaries. Results The procedure was successfully performed in all 3 animals. The surgery times were 120, 45, 45 minutes for the 3 guinea pigs, and anesthesia times were 186, 90, and 76 minutes, respectively. Placing the animals in complete lateral recumbency was found to be critical to visualize and manipulate the ovaries. The guinea pigs recovered smoothly from anesthesia. Conclusion Laparoscopic ovariectomy with 3‐mm minilaparoscopic instrumentation using a 3‐port technique was feasible in guinea pigs. Clinical significance Laparoscopic ovariectomy can be considered as an alternative to open ovariectomy as an elective surgical technique to prevent reproductive disorders in guinea pigs.

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Section: Discussionmentioning

confidence: 54%

Laparoscopic ovariectomy in guinea pigs: A pilot study

et al. 2019

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“…The positioning of the bear at 45 • from dorsal recumbency provided easy access to both uterine horns, oviducts, and ovaries. Liehmann et al showed that tilting dogs to 45 • from dorsal recumbency provided the best observation of the ovaries in dogs [21]. Although dorsal recumbency is often used to begin laparoscopic procedures, it was determined that the size of the animal would make it more difficult to change the positioning during the surgical procedure without increasing the risk of possible contamination of the surgical site.…”

Section: Discussionmentioning

confidence: 99%

Laparoscopic Evaluation of the Reproductive Tract in Two Female Polar Bears (Three Procedures) (Ursus maritimus)

Aldrich,

Hendrickson,

Schmitt

et al. 2024

Life

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Polar bears (Ursus maritimus) face a number of challenges that threaten the survival of the species. Captive breeding represents one essential facet of species conservation, but aspects of the polar bear’s reproductive physiology, such as follicle maturation, coitus-induced ovulation, and pseudopregnancy, are poorly characterized and present challenges for enhancing natural reproductive success and the application of advanced reproductive techniques. Due to the absence of a reliable transrectal or transabdominal ultrasound method for ovarian examination in the species, the ovaries of two adult female polar bears were examined laparoscopically to evaluate the feasibility of surgical access to the ovaries, oviduct, and uterus. The minimally invasive procedure was easily and rapidly performed in both bears and all procedures. Direct visual assessment of the ovary was possible after dissection of a fatty bursal sac, which completely enclosed the ovaries. In the second bear, laparoscopic manipulation of the ovary to draw it closer to the body wall enabled transcutaneous ultrasound. Laparoscopy may be a valuable tool to aid in the application of advanced reproductive technologies in polar bears.

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“…Both were placed with a 6mm skin incision, followed by stab incision with an 11-blade under intra-abdominal visual guidance of the camera telescope. Both ovaries were approached and excised in the same standardized manner [5] and left ovariectomy was always performed rst [25]. The patient was tilted 20-30° right lateral, towards the surgeons side.…”

Section: Methodsmentioning

confidence: 99%

Comparison of two advanced bipolar tissue sealer/dividers for laparoscopic ovariectomy in dogs: Articulating Enseal G2 versus Ligasure Maryland device

Driessen,

Marrero,

Grinwis

et al. 2023

Preprint

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Background Advanced bipolar tissue sealer/dividers provide the most reliable and efficient means of tissue dissection and blood vessel ligation in laparoscopic surgery and techniques are continuously improved. In veterinary practice cost-effectiveness is of major impact, leading to re-use of instruments designed and sold for single use. Two high-end devices were evaluated and compared in a highly standardized laparoscopic ovariectomy procedure in dogs in the present study: The new generation Ligasure Maryland Sealer/Divider (LMSD) with improved atraumatic curved jaw shape for delicate tissue handling and dissection and non-stick nanocoating, and the new-generation Articulating Enseal G2 (AENG2) with several proclaimed features improving surgical performance, including articulation of the forceps tip; improved tissue compression during sealing; unique offset electrode configuration; and specific nanoparticle coating minimizing thermal spread and tissue sticking. Twenty-one client-owned dogs admitted for elective laparoscopic ovariectomy were randomly assigned to one of two groups: ovariectomy using AENG2 on the left ovary and LMSD in the right ovary or vice-versa. Procedural video recordings were used to assess ovarian ligament fat score, smoke formation, occurrence of bleeding, and excision duration. Excised tissues were examined histopathologically and collateral thermal damage was scored in three anatomic zones: suspensory ligament, vascular pedicle, and uterine junction. Tissue sealers were used repeatedly following standardized cleaning protocol with instrument washing machine and Ethylene Oxide gas sterilization and the number of uses until device failure was recorded. Results Excision times were significantly increased for AENG2 (median 01:35 min) compared to LMSD (median 01:00 min). Minor hemorrhage from incomplete sealing occurred in 3 sites in 2 patients (2x AENG2, 1x LMSD) and was not significantly different between groups. Smoke production as scored on videos and thermal tissue damage scores on histopathology also did not differ between AENG2 and LMSD. Both vessel sealers could be re-used repeatedly. Conclusion AENG2 provides a good alternative to LMSD in laparoscopic ovariectomy, with only minor differences in measured variables. Subjectively, the articulating feature of AENG2 did not improve surgical performance in laparoscopic ovariectomy and the use of LMSD appeared more straight-forward. However, differences in operating these devices may be subject to personal preference.

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Effect of patient rotation on ovary observation during laparoscopic ovariectomy in dogs

Abstract: The 45° table rotation provided the best ovary visualization, regardless of body side or observer experience. There is evidence that procedures should be started with the left ovary when body side declination is used for organ retraction from the ovaries.

Cited by 4 publications

References 27 publications

Laparoscopic ovariectomy in guinea pigs: A pilot study

Laparoscopic ovariectomy in guinea pigs: A pilot study

Laparoscopic Evaluation of the Reproductive Tract in Two Female Polar Bears (Three Procedures) (Ursus maritimus)

Comparison of two advanced bipolar tissue sealer/dividers for laparoscopic ovariectomy in dogs: Articulating Enseal G2 versus Ligasure Maryland device

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