Bacterial Contamination Results by Two Cleaning Techniques of Nasal Irrigation Bottle in Allergic Rhinitis Patients: Single-blinded, Randomized Controlled Study
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Abstract
Background: Nasal irrigation in patients with allergic rhinitis helps to control the symptoms and improves the quality of life. In Thailand, there is no information about bacterial contamination rates in nasal irrigation bottles for these patients, and there are still no data concerning cleaning methods of nasal irrigation bottles to reduce bacterial contamination.
Objectives: To compare bacterial contamination rates in the nasal irrigation bottles between cleaning methods of tap water, or 0.9% saline solution, and to investigate the relationship between contamination results and symptoms of acute rhinosinusitis.
Materials and methods: This single-blinded randomized controlled trial was conducted in 69 patients with allergic rhinitis, who had used a nasal irrigation bottle at least once a day at the Department of Otolaryngology, Burapha University Hospital, in May 2020. The patients were divided into 2 groups according to their bottle cleaning method, namely tap water or 0.9% saline solution. After 4 weeks of the bottle usage, the bacterial culture of the bottle was examined and the patients were asked about the symptoms of acute rhinosinusitis in the follow-up period.
Results: The contamination rates of the groups for bottle cleaning with tap water and 0.9% saline solution were 61.1% and 57.6% respectively, and the most common microorganism was Pseudomonas aeruginosa. The contamination rates of both groups were not statistically significantly different (p = 0.77) and the relationship between the contamination rate and the symptoms of acute rhinosinusitis was not statistically significant (p = 0.79).
Conclusion: Bacterial contamination rates between the groups of nasal irrigation bottle cleaning with tap water and 0.9% saline solution were not statistically significantly different and the bottle contamination rate was not statistically significantly associated with the symptoms of acute rhinosinusitis.
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References
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