Effect of high flow nasal oxygen on nasopharyngeal pressure

Shown is nasopharyngeal pressure as a function of increasing oxygen flow. As the flow rate is increased, nasopharyngeal pressure rises, and peaks mid to late expiration.

Used with permission of Mary Ann Liebert, Inc., from: Parke RL, McGuinness SP. Pressures delivered by nasal high flow oxygen during all phases of the respiratory cycle. Respir Care 2013; 58:1621. Permission conveyed through Copyright Clearance Center, Inc. Copyright © 2013 Mary Ann Liebert, Inc.; permission conveyed through Copyright Clearance Center, Inc.

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Effect of high flow nasal oxygen on nasopharyngeal pressure