Method for long-term intestinal access in the dog

Area of Science:

• Veterinary Surgery
• Animal Research Models

Background:

• Traditional devices for long-term intestinal access in animals often cause infection, tissue reactions, and require single housing.
• Existing methods can lead to implant damage and complications, compromising animal welfare and research integrity.

Purpose of the Study:

• To evaluate the efficacy and safety of using intussuscepted nipple valves for establishing long-term intestinal access in dogs.
• To compare the nipple valve technique with traditional stoma methods regarding post-operative complications and animal quality of life.

Main Methods:

• Intussuscepted nipple valves were surgically implanted in 14 dogs to create access to the colon, duodenum, or ileum.
• The study monitored for post-operative complications, leakage, tissue rejection, and assessed the need for single housing or activity restrictions.

Main Results:

• The nipple valve technique resulted in minimal post-operative complications, no leakage, and no tissue rejection due to the absence of foreign materials.
• Long-term intestinal access was successfully established in multiple sites in 14 dogs, with some instrumentation exceeding 60 weeks.
• Instrumented dogs did not require single housing, could participate in outdoor activities, and showed no compromise in quality of life.

Conclusions:

• Intussuscepted nipple valves offer a superior method for achieving long-term intestinal access in laboratory dogs.
• This technique enhances animal welfare, simplifies management, and reduces complications associated with traditional intestinal access devices.