Renal embolization was performed in 12 dogs using the Seldinger technique and microspheres 250 ± 40 µm in diameter. Periodical arteriography, microangiographies and histological analysis were carried out to control the efficacy of embolization. As a result, renal arteries could be embolized with microspheres, however, because of statistical distribution there were histologically anemic and normal parenchyma situated closely together. In more than 50% there was a reflux of microspheres which could only be detected by histological examination, while angiographies showed a totally normal vascular pattern. Microspheres should not be used in clinical embolization. Experimental investigation of embolization materials must almost embrace histological analysis.

Keywords:
Renal embolization, Microspheres, Histology, Angiography, Complications
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© 1977 S. Karger AG, Basel
1977
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