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Purpose   The antibacterial effect of hypochlorous acid (HOCl) solution on nasal secretion of patients with chronic rhinosinusitis (CRS) was investigated.Materials and Methods   Five swab specimens were collected from the middle meatus of CRS patients. The first one was placed directly in a Thanswab tube while all of the others were placed randomly into 4 glass tubes containing either HOCl solution, normal saline (NS), 75% alcohol, or povidone-iodine (PVPI) solution for one minute in the first part and for 5 minutes in the second part of the study before transfer to a Thanswab tube.Results   Bacteria were cultured from 27 of 50 specimens when they were put directly in a Thanswab tube and from 26 after soaking in HOCl solution, 27 in NS, 13 in 75% alcohol, and 25 in PVPI solution for one minute. In the second part of the study, bacteria were cultured from 14 of 32 specimens when they were put directly in a Thanswab tube and from 14 after soaking in HOCl solution, 13 in NS, 3 in 75% alcohol, and 11 in PVPI solution for 5 minutes.Conclusions   This study showed that HOCL solution did not exert an antibacterial effect on nasal secretion from CRS patients within 5 minutes.

Antibacterial Effect of Hypochlorous Acid Solution on Nasal Discharge from Patients with Chronic Rhinosinusitis