Fraction of Inspired Oxygen With Low-Flow Versus High-Flow Devices: A Simulation Study.
cannula
fraction of inspired oxygen
oxygen
respiration
respiratory system
Journal
Cureus
ISSN: 2168-8184
Titre abrégé: Cureus
Pays: United States
ID NLM: 101596737
Informations de publication
Date de publication:
May 2022
May 2022
Historique:
accepted:
18
05
2022
entrez:
23
6
2022
pubmed:
24
6
2022
medline:
24
6
2022
Statut:
epublish
Résumé
The fraction of inspired oxygen while administering oxygen to patients must be measured as it represents the alveolar oxygen concentration, which is important from a respiratory physiology viewpoint. Therefore, the purpose of this study was to compare the fractions of inspired oxygen obtained through different oxygen delivery devices. A simulation model of spontaneous respiration was used. The fractions of inspired oxygen obtained through low- and high-flow nasal cannulas and a simple oxygen mask were measured. The fraction of inspired air was measured every second for 30 s after 120 s of oxygen administration. This was measured three times under each condition. With a low-flow nasal cannula, airflow reduced both the intratracheal fraction of inspired oxygen and extraoral oxygen concentration, indicating that exhalatory respiration occurred during rebreathing and may be involved in increasing the intratracheal fraction of inspired oxygen. Oxygen administration during expiratory flow may lead to an increased oxygen concentration in the anatomical dead space, which may be involved in the increase in the fraction of inspired oxygen. With a high-flow nasal cannula, a high fraction of inspired oxygen can be achieved even at a flow rate of 10 L/min. When determining the optimum amount of oxygen, it is necessary to set an appropriate flow rate for patients and specific conditions without being bound by the fraction of inspired oxygen values alone. It might be difficult to estimate the fraction of inspired oxygen while using a low-flow nasal cannula and simple oxygen mask in clinical situations.
Identifiants
pubmed: 35733468
doi: 10.7759/cureus.25122
pmc: PMC9205390
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e25122Informations de copyright
Copyright © 2022, Kojima et al.
Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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