Sealing maneuver for microvascular anastomoses in rats

Area of Science:

• Veterinary Medicine
• Surgical Techniques
• Animal Research

Background:

• Microsurgical skills are fundamental for rat research and surgical training.
• Current methods often require significant numbers of rats, raising ethical concerns.
• Reducing animal use in research and training is a key objective.

Purpose of the Study:

• To introduce and evaluate a novel "sealing maneuver" technique.
• To reduce bleeding during microsurgical procedures, particularly arterial anastomoses.
• To minimize the number of rats required for microsurgical research and training.

Main Methods:

• The sealing maneuver involves briefly opening a distal clamp to allow blood into the anastomotic site.
• The clamp is closed, allowing blood to seal the anastomosis for approximately one minute.
• This technique was applied to 62 end-to-end and end-to-side microanastomoses in 32 rats.

Main Results:

• The sealing maneuver significantly minimized blood loss during microsurgical procedures.
• The technique proved simple, reliable, and effective in both end-to-end and end-to-side anastomoses.
• Rat physiology, with its high fluid volume turnover, makes this technique particularly suitable.

Conclusions:

• The sealing maneuver is an effective method for reducing bleeding in rat microsurgery.
• This technique offers a valuable tool for improving microsurgical training and research efficiency.
• Adoption of this maneuver can contribute to reducing the number of animals used in scientific studies.