Initial experience with use of hydrogel microcoils in embolization of pulmonary arteriovenous malformationsReport as inadecuate

Initial experience with use of hydrogel microcoils in embolization of pulmonary arteriovenous malformations - Download this document for free, or read online. Document in PDF available to download.


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The purpose of this study is to describe our initial experience with embolization of pulmonary arteriovenous malformations PAVMs using hydrogel microcoils. The technical and radiological outcomes were retrospectively reviewed in seven patients with nine simple-type PAVMs median feeder size 4 mm, range 3-6 mm who underwent embolization. Hydrogel microcoils were mainly used, and detachable bare microcoils were combined as needed to occlude the terminal feeding artery just before the sac. Of a total of 43 microcoils, 30 69.8% hydrogel microcoils were deployed in eight PAVMs with the median number 3.5 range 2 to 6 per lesion. All hydrogel microcoils were successfully deployed without microcatheter stuck or malposition. In the remaining one small PAVM, only soft bare microcoils were used, however, resulting in recanalization requiring additional coils in the second session. The venous sac was substantially shrunk in all lesions treated with hydrogel microcoils with the median size reduction rate 95.0% range 81.8% to 99.0% during the median follow-up period 10 months range 6 to 18 months. In conclusion, hydrogel microcoils were safely and effectively applied for occluding PAVMs with relatively small feeders.

KeywordsPulmonary arteriovenous malformations Embolization Hydrogel microcoils Electronic supplementary materialThe online version of this article doi:10.1186-2193-1801-3-609 contains supplementary material, which is available to authorized users.

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Author: Keigo Osuga - Kentaro Kishimoto - Kaishu Tanaka - Masahisa Nakamura - Yusuke Ono - Noboru Maeda - Hiroki Higashihara - Tets


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