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Research ArticleOriginal Research

The Impact of High-Flow Nasal Cannula on Olfactory Function

Esra Adiyeke, Ozlem Saatci, Nilufer Coskun, Halide F Uludag Kiziltepe, Orhan U Dogru and Nurten Bakan
Respiratory Care February 2020, respcare.07309; DOI: https://doi.org/10.4187/respcare.07309
Esra Adiyeke
Department of Anesthesiology and Reanimation, University of Health Sciences, Istanbul, Turkey.
Faculty of Medicine, Sancaktepe Education and Research Hospital, Istanbul, Turkey.
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  • For correspondence: [email protected]
Ozlem Saatci
Department of Otolaryngology and Head and Neck Surgery, University of Health Sciences, Istanbul, Turkey.
Faculty of Medicine, Sancaktepe Education and Research Hospital, Istanbul, Turkey.
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Nilufer Coskun
Department of Anesthesiology and Reanimation, University of Health Sciences, Istanbul, Turkey.
Faculty of Medicine, Sancaktepe Education and Research Hospital, Istanbul, Turkey.
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Halide F Uludag Kiziltepe
Department of Anesthesiology and Reanimation, University of Health Sciences, Istanbul, Turkey.
Faculty of Medicine, Süreyyapaşa Education and Research Hospital, Istanbul, Turkey.
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Orhan U Dogru
Department of Anesthesiology and Reanimation, University of Health Sciences, Istanbul, Turkey.
Faculty of Medicine, Sancaktepe Education and Research Hospital, Istanbul, Turkey.
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Nurten Bakan
Department of Anesthesiology and Reanimation, University of Health Sciences, Istanbul, Turkey.
Faculty of Medicine, Sancaktepe Education and Research Hospital, Istanbul, Turkey.
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Abstract

BACKGROUND: Oxygen therapy provided via high-flow nasal cannula (HFNC) improves gas exchange lung compliance and results in increased lung expiratory volumes. Previous data indicate that hyperbaric and humid states improve the olfactory thresholds compared to hypobaric and dry conditions. This prospective, observational study aimed to determine the impact of oxygen delivery through HFNC on olfactory function in subjects admitted to the ICU for acute respiratory failure (ARF).

METHODS: 30 subjects who were admitted to the ICU for ARF underwent an olfactory sniff test before and after oxygen therapy with HFNC. Baseline olfactory function of subjects with ARF was also compared against 30 healthy controls. Odor threshold (OT), odor discrimination (OD), odor identification (OI) and global olfactory score (TDI) were recorded for all subjects.

RESULTS: The OT, OD, OI, and TDI scores were significantly higher in the control group compared to the baseline scores of the subjects with ARF (P < .001 for all comparisons). In subjects with ARF, administration of oxygen with HFNC led to significant improvements in OT (P = .02), OD (P = .001), OI (P = .02), and TDI (25.5 ± 3.8 vs 27.1 ± 3.5, P < .001) scores.

CONCLUSIONS: Our results indicate that subjects with ARF had relative olfactory dysfunction compared to healthy controls. These results also suggest that implementation of HFNC to relieve hypoxemia in subjects presenting with ARF can lead to a significant improvement in olfactory function.

  • acute respiratory failure
  • oxygen therapy
  • high-flow nasal cannula
  • Sniffin’ sticks test
  • olfactory function

Footnotes

  • Correspondence: Esra Adiyeke MD, Department of Anesthesiology and Reanimation, University of Health Sciences, Sancaktepe Education and Research Hospital, Emek Mahallesi, Namık Kemal Cad. No. 54, 34785 Sancaktepe, Istanbul, Turkey. E-mail: esasaladiyeke{at}gmail.com
  • The authors have disclosed no conflicts of interest.

  • Copyright © 2020 by Daedalus Enterprises

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Respiratory Care: 66 (1)
Respiratory Care
Vol. 66, Issue 1
1 Jan 2021
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The Impact of High-Flow Nasal Cannula on Olfactory Function
Esra Adiyeke, Ozlem Saatci, Nilufer Coskun, Halide F Uludag Kiziltepe, Orhan U Dogru, Nurten Bakan
Respiratory Care Feb 2020, respcare.07309; DOI: 10.4187/respcare.07309

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The Impact of High-Flow Nasal Cannula on Olfactory Function
Esra Adiyeke, Ozlem Saatci, Nilufer Coskun, Halide F Uludag Kiziltepe, Orhan U Dogru, Nurten Bakan
Respiratory Care Feb 2020, respcare.07309; DOI: 10.4187/respcare.07309
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Keywords

  • acute respiratory failure
  • oxygen therapy
  • high-flow nasal cannula
  • Sniffin’ sticks test
  • olfactory function

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