Mupirocin Nasal Irrigation Following Endoscopic Sinus Surgery: A Prospective,Double-Blinded,Placebo-Controlled Trial

Abstract

Background

Postoperative care following endoscopic sinus surgery (ESS) aims to optimize mucosal healing, reduce inflammation, and minimize infectious complications. Although saline irrigation is considered standard of care, the potential benefit of adding topical antibiotics, such as mupirocin, during the early postoperative period remains uncertain.

Objective

To evaluate whether short-term postoperative mupirocin nasal irrigation improves clinical, endoscopic, and microbiological outcomes compared with saline irrigation alone following ESS.

Methods

This prospective, randomized, double-blinded, placebo-controlled trial included adults with chronic rhinosinusitis undergoing ESS. Patients were randomized to receive either mupirocin (0.05%) nasal irrigation or placebo saline irrigation twice daily for 21 days postoperatively. Outcomes assessed within the first 3 months included patient-reported symptoms using the sinonasal outcomes test (SNOT-22) and visual analog scale (VAS), endoscopic findings (mucosal edema, polyp formation, crusting, granulation tissue, and purulence), postoperative sinus culture results, and need for systemic antibiotics.

Results

Sixty-eight patients were enrolled, and 56 completed follow-up. Both groups demonstrated significant postoperative improvement in SNOT-22 and VAS scores compared with preoperative baseline, without significant between-group differences. However, the mupirocin group showed significantly lower rates of endoscopic mucosal edema and polyp formation at 1 month postoperatively. Negative postoperative cultures were also more frequent in the mupirocin group, with reduced need for systemic oral antibiotics. No significant differences were observed in crusting, granulation tissue, purulence, steroid use, or pain medication requirements.

Conclusion

Short-term prophylactic postoperative mupirocin nasal irrigation after ESS does not confer additional improvement in patient-reported quality-of-life outcomes compared with saline alone but appears to reduce early inflammatory endoscopic changes, bacterial culture positivity, and need for systemic antibiotics. Larger studies with longer follow-up are needed to confirm these findings.