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Open Approach to the Transversus Abdominis Plane in Horses: A Cadaver Feasibility Study
Maia R Aitken1, Dario A Floriano2, Klaus Hopster1
1Department of Clinical Studies-New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA.
Veterinary Sciences
|January 26, 2024
Summary
This study explored an open transversus abdominis plane (TAP) block in equine cadavers. While feasible, success was limited by increased adiposity, impacting dye dispersion in the transversus abdominis plane.
Area of Science:
- Veterinary Anatomy
- Surgical Techniques
- Pain Management
Background:
- The transversus abdominis plane (TAP) block is a regional anesthesia technique.
- Evaluating novel approaches for equine pain management is crucial.
Purpose of the Study:
- To assess the feasibility and dye dispersion of an open approach to the transversus abdominis plane (TAP) block in adult equine cadavers.
- To determine the efficacy and limitations of this technique in horses.
Main Methods:
- An open ventral midline incision was used in eight equine cadavers.
- New methylene blue (NMB) dye was injected blindly into the TAP using palpation.
- Dye presence, dispersion extent, and spread width were evaluated post-dissection.
Main Results:
- Successful dye deposition in the TAP was achieved in 5 out of 8 horses.
- The median injection time was 263 seconds.
- Increased retroperitoneal fat and body condition score (BCS) were associated with unsuccessful injections.
Conclusions:
- The open TAP block approach is technically feasible and rapid in equine cadavers.
- Increased adiposity negatively impacts the success rate and dye dispersion.
- Further research is needed to optimize this technique for clinical application in horses.
