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Methyltert-butyl ether in the endoscopic treatment of common bile duct radiolucent stones in elderly patients with nasobiliary tube

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Abstract

Methyltert-butyl ether is an effective dissolution agent for cholesterol stones. The aim of this work was to evaluate the effect of methyltert-butyl ether on radiolucent common bile duct stones in patients in whom endoscopic extraction has failed. From September 1985 to September 1987, 1374 patients underwent endoscopic retrograde cholangiopancreatography in our Liver Unit. An endoscopic sphincterotomy was indicated in 195 patients with common bile duct (CBD) stones because of an age over 65 years and/or surgical contraindications. Endoscopic sphincterotomy was efficient in 187 patients, allowing complete stone removal in association with conventional endoscopic methods and mechanical lithotripsy in 170 patients. Twelve of the 17 patients with failure of conventional endoscopic treatments were either older than 75 years (11 patients; mean age, 86±4.5 years) or exhibited a surgical contraindication. Stones completely obstructed CBD in six patients and had a diameter exceeding 25 mm in the six other patients. These subjects were selected for stone dissolution by methyltert-butyl either (MTBE) according to the following protocol. MTBE was directly infused into CBD through a nasobiliary catheter, twice daily for 4–13 days (mean, seven days). Bile duct opacification, repeated after MTBE treatment, revealed the complete disappearance of CBD stones in one patient, a decrease in stone size in five patients and no change in the six tther patients. MTBE treatment was well tolerated except in three patients who complained from transient abdominal pains and nausea. At the second attempt of endoscopic treatment, CBD stones were found to be softened and easily broken up, allowing a complete clearance in six patients. MTBE treatment failed to improve stone extraction in the five other patients. These results show that, in patients with large radiolucent stones in the CBD, unextractable by conventional endoscopic methods, the direct infusion of MTBE in CBD rarely led to a complete stone dissolution; however, this treatment partially solubilizes stones, enabling their complete endoscopic extraction thereafter in half the patients.

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Authors and Affiliations

  1. Service des Maladies de l'Appareil Digestif, Hôpital Saint-Eloi, 34059, Montpellier, France

    D. Diaz MD, P. Bories MD, M. Ampelas MD, D. Larrey MD, PhD & H. Michel MD

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  1. D. Diaz MD
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  2. P. Bories MD
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  3. M. Ampelas MD
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  4. D. Larrey MD, PhD
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  5. H. Michel MD
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Diaz, D., Bories, P., Ampelas, M. et al. Methyltert-butyl ether in the endoscopic treatment of common bile duct radiolucent stones in elderly patients with nasobiliary tube. Digest Dis Sci 37, 97–100 (1992). https://doi.org/10.1007/BF01308349

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  • DOI: https://doi.org/10.1007/BF01308349

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