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  • Stents designed for deployment into one of the paranasal sinus (i.e., frontal, ethmoid, or sphenoid) ducts to provide support and/or maintain patency that include a drug that is released into the surrounding tissue over time. These stents may consist of a polymeric (frequently a bio-absorbable poly-lactide) tubes that resembles a soft balloon and release anti-inflammatory drugs (e.g., triamcinolone acetate, mometasone furoate). The stents are, available in several different shapes and sizes according to the sinus on which they are deployed and may include a self-retention mechanism to prevent migration. Drug-eluting paranasal sinus stents are intended for temporary (e.g., two to four weeks) ventilation and drainage of fluids from the sinus. They are usually delivered using dedicated instruments (e.g., deployment guides). The stents are mainly used after functional endoscopic sinus surgery (FESS).
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