Chemical ablation of the gallbladder: is it feasible?

PURPOSE

Transcatheter ablation of the gallbladder has been attempted in animals and humans with a variety of chemical and physical agents. Initial in vitro experiments suggested sodium hydroxide and hydrogen peroxide were more effective sclerosants than previously reported chemical agents. A phase I trial of escalating concentrations of and exposure times to these agents was performed in vivo.

MATERIALS AND METHODS

Fourteen domestic pigs underwent cholecystostomy tube placement and cystic duct ligation. Two weeks later, sclerosis was performed with sodium hydroxide/ethanol solutions and hydrogen peroxide.

RESULTS

Sequential 15- or 30-minute exposures to 0.1 N solutions of sodium hydroxide in ethanol followed by 3% peroxide failed to completely eliminate the pig gallbladder epithelium in vivo; 0.5 N and 1.0 N sodium hydroxide in ethanol caused gross gallbladder hemorrhage, mural dissection, and one perforation. Although the gallbladder lumen was ablated, the gallbladder epithelium was not completely eliminated in any animal.

CONCLUSION

Chemical ablation of the pig gallbladder epithelium was not feasible in this experimental model.