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Δευτέρα 7 Νοεμβρίου 2022

Corticosteroid Nasal Irrigation as Early Treatment of Olfactory Dysfunction in COVID‐19: A prospective randomized controlled trial

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Abstract

Objective

This study aimed to evaluate the efficacy of corticosteroid irrigation compared to saline to no nasal irrigation in COVID-19 patients with olfactory loss.

Design and Setting

A randomized controlled study was conducted at the Otolaryngology-Head & Neck Surgery Department, Ramathibodi Hospital, Faculty of Medicine, Mahidol University.

Participants

Two hundred thirty-seven COVID-19 participants with a new-onset smell loss were recruited into the study. Two hundred twenty-two participants met the inclusion criteria and were randomized into three groups; corticosteroid irrigation, saline irrigation, and no treatment.

Main outcome measures

The primary outcome was the mean difference in the smell sensation score among the groups after treatment at 1, 2, and 6 weeks. The secondary outcomes measurements included 1)a self-rating quality of life(QOL)-related smell dysfunction score, 2)the change over time in smell sensation score and self-rating QOL-related smell dysfunction score, and 3)the median time to complete recovery of smell loss.

Results

The mean differences in smell sensation scores among the three groups were not statistically significant at any follow-up period. The mean score of self-rating QOL-related smell dysfunction in the corticosteroid group was significantly better than the other groups at one week. The change of outcome scores showed significant improvement over time, regardless of the treatments. The median time to complete smell recovery was similar: three weeks.

Conclusion

This study emphasized that corticosteroid nasal irrigation is not superior to saline or no nasal irrigation in restoring the sense of smell in COVID-19-associated olfactory loss.

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