Effect of High-Flow Nasal Cannula Flow on Intrapharyngeal Pressure During Fiberoptic Bronchoscopy Under Deep Sedation.

ABSTRACT:

Background

The flow reaching the vocal folds may be lower than that at the output of high-flow nasal cannula (HFNC) system. This could be due to upper-respiratory obstruction, oxygen leakage, or other factors. The objective of this study was to observe the effect of flow through a nasopharyngeal airway on intrapharyngeal pressure (IPP) in subjects undergoing fiberoptic bronchoscopy (FOB).

Methods

Patients scheduled for FOB were invited to participate. Measurements were performed at flows of 0-60 L/min; the subjects wore WN-N95 folding medical protective masks (N95) and either underwent FOB or not. IPP at each flow was recorded following 15 s of ventilation, and the cross-sectional area (CSA) of the gastric sinus was measured before and after FOB. Hypoxemia, reflux aspiration

SUBMITTER: Li J 

PROVIDER: S-EPMC11469016 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature