Method for repeated or prolonged rumen infusion without establishing an open fistula

Area of Science:

• Veterinary Surgery
• Animal Science
• Ruminant Nutrition

Background:

• Repeated or prolonged infusion of substances into the rumen is crucial for various animal science studies.
• Existing methods for rumen access often involve complex maintenance or open fistulas, posing challenges for long-term research.

Purpose of the Study:

• To develop and describe a simplified surgical method for repeated or prolonged infusion into the rumen.
• To provide a practical technique for long-term rumen access in research animals.

Main Methods:

• A blind rumen fistula was surgically created, allowing access to the unopened rumen beneath the skin.
• A cardiac catheter was inserted into the rumen and secured to the animal's coat.
• The method was tested in cattle and sheep for infusion periods ranging from one to six weeks.

Main Results:

• The blind rumen fistula technique facilitated continuous substance infusion for up to six weeks in cattle and sheep.
• The preparation also allowed for direct introduction of plant material and collection of rumen contents.
• This method enabled the maintenance of a large number of fistulated animals over extended periods.

Conclusions:

• The developed blind rumen fistula technique offers a practical and effective approach for long-term rumen access in research.
• This method overcomes the disadvantages associated with traditional open fistulas, improving animal welfare and research efficiency.
• The technique is suitable for various applications, including substance infusion, dietary studies, and sample collection in ruminant research.