Intraoperative pain responses following intraovarian versus mesovarian injection of lidocaine in mares undergoing laparoscopic ovariectomy.
Abstract: To compare intraoperative pain responses following intraovarian versus mesovarian injection of lidocaine in mares undergoing laparoscopic ovariectomy. Methods: Randomized controlled trial. Methods: 15 mares between 4 and 20 years old. Methods: Standard bilateral laparoscopic ovariectomy was performed. Prior to manipulation of the ovary, 2% lidocaine (10 mL) was injected into the ovary and saline (0.9% NaCI) solution (10 mL) was injected into the mesovarium on 1 side, with saline solution (10 mL) injected into the ovary and 2% lidocaine (10 mL) injected into the mesovarium on the other side. Presence (yes vs no) and severity (visual analogue scale) of pain were scored at 5 times (grasping of the ovary, dissection of the mesosalpinx, tightening of the first loop ligature, tightening of the second loop ligature, and transection of the ovarian pedicle) by 2 individuals blinded to treatment and each other's observations. Results: During 4 of the 5 observation periods, significantly fewer mares had signs of pain following mesovarian injection of lidocaine, and during 2 of the 5 observation periods, visual analogue scale score was significantly lower. Conclusions: Results suggest that mesovarian injection of lidocaine is associated with significantly lower pain responses, compared with intraovarian injection, in horses undergoing laparoscopic ovariectomy.
Publication Date: 2005-08-25 PubMed ID: 16117068DOI: 10.2460/javma.2005.227.593Google Scholar: Lookup
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- Clinical Trial
- Journal Article
- Randomized Controlled Trial
- Research Support
- Non-U.S. Gov't
Summary
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This research undertook a controlled trial to compare the effectiveness of two methods of administering lidocaine during a laparoscopic ovariectomy in mares. The study found that injecting lidocaine into the mesovarian region, rather than directly into the ovary, resulted in significantly fewer pain responses.
Methodology
- Conducting a controlled trial, the researchers considered 15 mares aged between 4 and 20 years.
- The mares underwent a standard bilateral laparoscopic ovariectomy, a type of minimally invasive surgery to remove both ovaries.
- Before manipulating the ovary, the team administered a 10ml injection of 2% lidocaine into the ovary along with a saline solution into the mesovarium (the supportive tissue surrounding the ovary) on one side. Conversely, on the other side, they injected the same saline solution into the ovary and the lidocaine into the mesovarium.
- The team observed and scored the presence and severity of pain at five key stages during the operation.
- The assessment was carried out by two individuals who didn’t know which treatment had been administered on which side, and they were not privy to each other’s observations.
Results
- The team found that fewer mares showed signs of pain following the injection of lidocaine into the mesovarian region at four of the five assessed stages during surgery.
- Furthermore, the severity of pain, as scored by the assessors, was noticeably lower at two out of the five observation points in mares that received the mesovarian injection of lidocaine.
Conclusions
- The researchers concluded that injecting lidocaine into the mesovarian area was associated with significantly lower pain responses when compared with a direct injection into the ovary.
- This finding suggests a potential improvement for procedural pain management in horses undergoing laparoscopic ovariectomy, potentially leading to better animal welfare and improved surgical outcomes.
Cite This Article
APA
Farstvedt EG, Hendrickson DA.
(2005).
Intraoperative pain responses following intraovarian versus mesovarian injection of lidocaine in mares undergoing laparoscopic ovariectomy.
J Am Vet Med Assoc, 227(4), 593-596.
https://doi.org/10.2460/javma.2005.227.593 Publication
Researcher Affiliations
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
MeSH Terms
- Anesthetics, Local / administration & dosage
- Animals
- Female
- Horses / physiology
- Horses / surgery
- Intraoperative Care / methods
- Intraoperative Care / veterinary
- Intraoperative Period
- Laparoscopy / methods
- Laparoscopy / veterinary
- Lidocaine / administration & dosage
- Ovariectomy / methods
- Ovariectomy / veterinary
- Pain / drug therapy
- Pain / veterinary
- Pain Measurement / veterinary
- Treatment Outcome
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