Objective: Insertion of the levonorgestrel-releasing intrauterine system Mirena is difficult in women with adenomyosis, and the device is often subsequently expelled. We used a novel insertion technique (Yang's method) to overcome this problem. Materials and Methods: This retrospective study enrolled 273 patients with adenomyosis who were receiving Mirena for treatment of menorrhagia and/or dysmenorrhea between 2001 and 2008. Clinical outcomes and expulsion rates were compared between patients treated using conventional insertion and those treated using Yang's insertion methods. Results: Expulsion occurred in 25.3% of patients with the conventional method, compared with 10.2% of patients with Yang's method. Hemoglobin levels and dysmenorrhea improved greatly in both groups after Mirena insertion. Conclusion: Yang's insertion method for levonorgestrel-releasing intrauterine system is more reliable in some difficult cases, such as patients with severe adenomyosis. This method ensures correct positioning, thus reducing the risks of uterine perforation and/or expulsion.
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