Purpose: Our study describes ultrasonography (US) aspects of complications related to the use of the Bioenterics intragastric balloon (BIB) system for the treatment of moderate obesity.
Materials and methods: Over the last three years 151 BIBs were endoscopically placed and inflated with 500-600 ml of saline plus 10 ml of methylene blue in 131 patients (mean age 38.4 years, range 18-72; 46 males, 85 females, mean body mass index 43.8 kg/m(2)). In all cases abdominal US was carried out before and 1-2 days after endoscopy and thereafter at scheduled follow-up visits and/or whenever the patient complained of heartburn, vomiting, a sensation of ''absence of the BIB'' with or without staining of urine and/or faeces.
Results: The BIB appeared as a round anechoic structure, with a thick hyperechoic wall and a hyperechoic band-like valve inside. In 8 cases staining of urine and/or faeces prompted immediate endoscopic removal. In 10 patients US findings of BIB-related complications were: 1) decreased volume with a visible valve (5 cases; in two of these staining of urine was reported); 2) multiple hyperechoic streaks regularly spaced due to a completely collapsed BIB, not modified by decubitus changes (3 cases; one patient reported staining of urine); 3) migration through the bowel (2 cases): in one patient the BIB was passed after 4 days, whereas in the other case bowel obstruction required laparoscopic surgery.
Conclusions: In conclusion, US provides a quick and accurate method for the assessment of BIB-related complications in obese patients.