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Heat ablation of the normal gallbladder in pigs
B D Aagaard1, L A Wetter, C K Montgomery
1Department of Radiology, University of California, San Francisco 94143-0628.
Journal of Vascular and Interventional Radiology : JVIR
|March 1, 1994
Summary
Percutaneous gallbladder ablation using a heater catheter shows potential for defunctionalization. Careful temperature control is crucial to avoid adjacent organ thermal injury, highlighting a narrow therapeutic window.
Area of Science:
- Minimally Invasive Surgery
- Gastroenterology
- Biomedical Engineering
Background:
- The retained gallbladder can be a source of complications.
- Thermal ablation offers a potential method for gallbladder defunctionalization.
Purpose of the Study:
- To investigate the safety and efficacy of ablating gallbladder mucosa using a percutaneously placed heater catheter in an animal model.
Main Methods:
- A three-stage study involving 39 pigs.
- Heater catheter configuration and temperature settings were optimized.
- Mechanical mixing and cystic duct ligation were employed to enhance ablation and prevent regeneration.
Main Results:
- Gallbladder ablation was achieved below 60°C.
- Maintaining adjacent organ serosal temperatures below 43°C was critical to prevent thermal injury.
- Ablation at 54°C for 35 minutes yielded 25% complete success, 50% partial success, and 25% failure.
Conclusions:
- Gallbladder defunctionalization is potentially achievable with thermal ablation techniques.
- A narrow thermal range exists between effective ablation and adjacent organ damage.
- Cystic duct ablation appears vital for preventing mucosal regeneration.
