Abstract

The clinical application of magnetic resonance imaging-guided focused ultrasound (MRgFUS) surgery for treatment of symptomatic uterine fibroids is often limited because of the bowel between the abdominal wall and uterus. If bowels are in the pathway of sonication path, firstly filling the bladder, then filling the rectum, and emptying the bladder subsequently can be used to avoid them in recent research. The purpose of this study was to evaluate whether the modified bowel displacement technique (rectal filling first and then bladder filling, with or without subsequent bladder emptying) was feasible to create secure acoustic window. A total of 78 patients who had undergone MRgFUS treatment for uterine fibroids and adenomyosis from January 2020 to November 2020 were included in this retrospective study. Of the 78 patients, 19 patients were treated using a modified bowel displacement technique, whereas the rest of the patients did not require intestinal displacement. High-intensity focused ultrasound was performed using GE Sightec HDXT 1.5 Tesla MR and ExAblate high-intensity focused ultrasound system. Of the 19 patients requiring bowel displacement techniques, 17 patients successfully completed MRgFUS surgery. Magnetic resonance imaging-guided focused ultrasound surgery was feasible in 4 patients after rectal filling, bladder filling, and subsequent bladder emptying. The others received ablation through the extended bladder because of bowel descending after emptying the bladder. The surgery caused no intestinal or uterine complications and no serious discomfort to the patient. The modified bowel displacement technique was effective in displacing interposed bowels during MRgFUS treatment to create safe acoustic pathway for ablating uterine fibroids and adenomyosis.

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