To assess the efficacy of intra-sinus installation of a poloxamer gel that releases antibiotics and corticosteroids topically after balloon sinuplasty in chronic sinusitis patients with or without polyps. This is a single-blinded Randomized Control Trial study, in which every patient receives active gel on one side and placebo on the other (L or R to be randomly selected).
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Clinical improvement reported on SNOT-22 questionnaire
Timeframe: The total duration of the actual study is 30 months, and the follow up period per patient will 6 months postoperatively.
Improvement in the Lund-Kennedy endoscopic appearance scores. Improvement in the Lund-Kennedy endoscopic appearance scores
Timeframe: The total duration of the actual study is 30 months, and the follow up period per patient will 6 months postoperatively.