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Related Experiment Videos

A simple method for long-term biliary access in large animals.

J C Andrews1, C Knutsen, P Smith

  • 1Department of Radiology, Upjohn Center for Clinical Pharmacology, University of Michigan Medical School, Ann Arbor 48109.

Investigative Radiology
|July 1, 1988
PubMed
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Researchers developed a simple method for long-term biliary tree access in dogs and pigs using a subcutaneous port and catheter. This technique allows for reliable serial cholangiograms up to four months post-implantation.

Area of Science:

  • Veterinary Medicine
  • Surgical Innovation
  • Medical Imaging

Background:

  • Long-term access to the biliary tree is crucial for research.
  • Existing methods may be invasive or lack durability.
  • A reliable model for serial cholangiography in research animals is needed.

Purpose of the Study:

  • To present a simple, reliable method for achieving long-term access to the biliary tree in dogs and pigs.
  • To establish a closed, internal system for repeated cholangiography.

Main Methods:

  • A cholecystectomy was performed in dogs and pigs.
  • A catheter was inserted into the cystic duct and connected to a subcutaneous infusion port.
  • Serial cholangiograms were obtained using a Huber needle and contrast medium under fluoroscopic guidance.

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Main Results:

  • Successful catheter placement was achieved in all ten dogs and three of four pigs.
  • Thirty-five cholangiograms were successfully obtained across all subjects.
  • No catheter failure or adverse surgical changes in the biliary tree were observed up to four months post-implantation.

Conclusions:

  • This technique provides a simple and reliable method for long-term biliary tree access in research animals.
  • The developed model facilitates serial cholangiography, supporting preclinical research.
  • The system demonstrates durability and safety for extended use in canine and porcine subjects.