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Investigation of the optimal method of oxygen administration with simultaneous use of a surgical mask: a randomized control study.
Matsui, Yusuke; Takazawa, Tomonori; Takemae, Akihito; Murooka, Yukie; Kanamoto, Masafumi; Saito, Shigeru.
  • Matsui Y; Department of Anesthesiology, Gunma University Graduate School of Medicine, Maebashi, Japan.
  • Takazawa T; Intensive Care Unit, Gunma University Hospital, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan. takazawt@gunma-u.ac.jp.
  • Takemae A; Department of Anesthesiology, Gunma University Graduate School of Medicine, Maebashi, Japan.
  • Murooka Y; Department of Anesthesiology, Gunma University Graduate School of Medicine, Maebashi, Japan.
  • Kanamoto M; Intensive Care Unit, Gunma University Hospital, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan.
  • Saito S; Department of Anesthesiology, Gunma University Graduate School of Medicine, Maebashi, Japan.
J Anesth ; 36(1): 26-31, 2022 02.
Article in English | MEDLINE | ID: covidwho-1397012
ABSTRACT

PURPOSE:

From the perspective of infection prevention during the Coronavirus disease 2019 (COVID-19) pandemic, a recommendation was made to use surgical masks after extubation in patients in the operating room. For compliance with this recommendation, anesthesiologists need to administer oxygen to the patient with an oxygen mask over the surgical mask. However, no studies have investigated whether this method allows good maintenance of oxygenation in patients. This study aimed to investigate which method of oxygen administration lends itself best to use with a surgical mask in terms of oxygenation.

METHOD:

We administered oxygen to the study subjects using all the following three methods in random order an oxygen mask over or under a surgical mask and a nasal cannula under the surgical mask. Oxygenation was assessed using the oxygen reserve index (ORi) and end-tidal oxygen concentration (EtO2).

RESULT:

This study included 24 healthy volunteers. ORi values with administration of oxygen were higher in the order of a nasal cannula under the surgical mask, an oxygen mask under the surgical mask, and an oxygen mask over the surgical mask, with median values of 0.50, 0.48, and 0.43, respectively, and statistically significant differences between all groups (P < 0.001). EtO2 values were in the same order as ORi, with median values of 33.0%, 31.0%, and 25%, respectively, and statistically significant differences between all groups (P < 0.001).

CONCLUSION:

Wearing a surgical mask over the nasal cannula during oxygen administration is beneficial for oxygenation and might help prevent aerosol dispersal.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 / Masks Type of study: Controlled clinical trial / Randomized controlled trials Limits: Humans Language: English Journal: J Anesth Journal subject: Anesthesiology Year: 2022 Document Type: Article Affiliation country: S00540-021-02998-6

Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 / Masks Type of study: Controlled clinical trial / Randomized controlled trials Limits: Humans Language: English Journal: J Anesth Journal subject: Anesthesiology Year: 2022 Document Type: Article Affiliation country: S00540-021-02998-6