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Polymer coating emboli have been affiliated with persisting brain lesions after endovascular procedures.1–6 Patient symptoms include headaches, fevers, chills (ie, constitutional symptoms), neurological presentations of focal weakness, sensory and visual deficits, and seizures. Follow-up imaging highlights distinct areas of contrast enhancement in slightly different locations, with some lesions increasing in number and size (see figure 1). Polymer particles from various coating compositions have different rates of degradation, absorption, and metabolism or excretion (DAM/E). These varied rates of DAM/E may have impacts on persisting brain lesions, recurrent patient symptoms, and adverse event outcomes.
Degradation is the chemical breakdown of a polymer by hydrolysis, oxidation, or enzymatic processes. A faster degradation rate may result in less obstruction within blood vessels or …
Contributors All authors have contributed to and approve this manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
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