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FIG 7. Distinct layering of the gravity-dependent DMSO (arrow). DMSO diffuses through biologic tissues at uncertain rates; layering is clearly seen in this aneurysm model, which is impermeable to DMSO, that may not be seen in biologic systems.FIG 8. A continuous embolic string, seen in only one case with an 8% UCO solution. The leading point of the embolic string was unfortunately carried out of the aneurysm by the outflow zone, although clear string compaction occurred even during the early phase of the string mass coiling.FIG 9. An unfavorable observation made with the UCO mixtures was a "smoky" fragment layer of polymer particles at the interface between the polymer mass and the parent-vessel fluid. These particles may ultimately embolize distally, with unknown fluid embolic complications.
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