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[Incidence and relation of endoscopic sphincterotomy to the proximal migration of biliary prostheses]
A Güitrón1, R Adalid, R Barinagarrementería
1Departamento de Endoscopia Digestiva, Hospital de Especialidades No. 71, Instituto Mexicano del Seguro Social, Blvd. Revolución y Calle No. 26.
Background:
Endoprostheses are commonly used in the treatment of biliary disorders. The frequency of and potential risk factors for stent migration, however, remain largely unknown.
Objective:
To determine how often biliary duct stents migrate proximally and to quantify the influence of specific risk factors on the occurrence of stent migration. PATIENTS METHODS AND RESULTS: We analyzed the occurrence of stent migration among the 410 stents for which follow-up data were available between January 1995 to December 1998. In 272 cases, we performed endoscopic sphincterotomy. Results demonstrated incidence rates of 4.4% for proximal biliary stent migration iatrogenic strictures were significantly associated with proximal biliary stent migration.
Conclusions:
Iatrogenic strictures were significantly associated with proximal common bile duct migration and the association between sphincterotomy and proximal migration failed to reach statistical significance.