American journal of rhinology & allergy · 2023
Intra Nasal Use of Ethylene Diamine Tetra Acetic Acid for Improving Olfactory Dysfunction Post COVID-19.
Рандомизированное исследованиеСтатьяНазвание и аннотация: Перевод в очереди
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Abdelazim Mohamed H, Mandour Zeyad, Abdelazim Ahmed H, Ismaiel Wael F, Gamal Mohammed, Abourehab Mohammed A S, Alghamdi Saleh, Alghamdi Mohamed A, Alrugi Rehab R, Alharthi Rawan R
Аннотация
BACKGROUND: COVID-19 has been associated with olfactory dysfunction in many infected patients. The rise of calcium levels in the nasal secretions plays an essential role in the olfaction process with a desensitization effect on the olfactory receptor neurons and a negative impact on the olfaction transmission. Ethylene diamine tetra acetic acid (EDTA) is a chelating agent that can bind free calcium in the nasal secretions, thereby reducing the adverse effects of calcium on olfactory function.
OBJECTIVES: The objective of this work is to demonstrate the effect of intranasal EDTA on improving olfactory dysfunction following COVID-19.
METHODS: Fifty patients with a history of COVID-19 and olfactory dysfunction that persisted for more than 6 months were enrolled in the current prospective randomized clinical trial. Participants were randomized into 2 equal groups. Twenty-five patients were treated with olfactory training only, while the remaining 25 patients received treatment with olfactory training and a topical nasal spray of ethylene diamine tetra acetic acid. The olfactory function was assessed before treatment and 3 months later using the Sniffin' Sticks test. Additionally, the determination of calcium level in the nasal secretions was performed using an ion-selective electrode before treatment and 3 months later.
RESULTS: Eighty-eight percent of the patients treated with olfactory training in addition to EDTA exhibited clinical improvement, while 60% showed improvement in patients treated with olfactory training only. Furthermore, a significant decrease in the measured calcium level in the nasal secretions was demonstrated after the use of ethylene diamine tetra compared to patients treated with olfactory training only.
CONCLUSION: Ethylene diamine tetra acetic acid may be associated with an improvement of the olfactory function post-COVID-19.
OBJECTIVES: The objective of this work is to demonstrate the effect of intranasal EDTA on improving olfactory dysfunction following COVID-19.
METHODS: Fifty patients with a history of COVID-19 and olfactory dysfunction that persisted for more than 6 months were enrolled in the current prospective randomized clinical trial. Participants were randomized into 2 equal groups. Twenty-five patients were treated with olfactory training only, while the remaining 25 patients received treatment with olfactory training and a topical nasal spray of ethylene diamine tetra acetic acid. The olfactory function was assessed before treatment and 3 months later using the Sniffin' Sticks test. Additionally, the determination of calcium level in the nasal secretions was performed using an ion-selective electrode before treatment and 3 months later.
RESULTS: Eighty-eight percent of the patients treated with olfactory training in addition to EDTA exhibited clinical improvement, while 60% showed improvement in patients treated with olfactory training only. Furthermore, a significant decrease in the measured calcium level in the nasal secretions was demonstrated after the use of ethylene diamine tetra compared to patients treated with olfactory training only.
CONCLUSION: Ethylene diamine tetra acetic acid may be associated with an improvement of the olfactory function post-COVID-19.