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FIG 1. Scanning electron microscopic image of a collagen-coated platinum microcoil that was inserted into an internal maxillary canine artery via a Tracker 18 microcatheter (magnigication x430). Most of the coil surface was covered with a thin layer of collagen.
FIG 2. Graphic representation of angiographic findings of 18 canine arteries treated with one uncoated and one collagen-primed coil. Angiography was performed 30 minutes postoperatively, and either 1 or 3 days, 1, 2, 3, 4, 8, 12, or 16 weeks after embolization
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