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March 14, 2026Respiratory Care

In Vitro Comparison of Continuous and Inspiration-Synchronized Aerosol Delivery During High-Flow Nasal Cannula Treatment

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Authors

JLJie LiOAOsama AlanaziJFJames Fink

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Overview

In vitro comparison shows inspiration synchronized nebulizer improves inhaled dose in adults using HFNC, suggesting better treatment efficacy.

Key Points

  • To compare inhaled doses delivered by inspiration-synchronized and continuous vibrating mesh nebulizers during high-flow nasal cannula treatment.
  • Connected a manikin to a dual-chamber lung model driven by a ventilator.
  • Compared aerosol delivery of a small-particle VMN and a commercially available VMN at varying HFNC flow rates.
  • Assayed the inhaled dose of albuterol using UV spectrophotometry after each run.
  • Inspiration synchronized VMN yielded a greater inhaled dose than continuous VMN when placed close to the nasal cannula.
  • Continuous VMN outperformed inspiration synchronized VMN at the inlet of the humidifier at higher flow rates (30 and 60 L/min).
  • Small-particle VMN consistently showed a higher inhaled dose than the commercially available VMN at lower flow rates.

Cite This Study

Li et al. (2022) studied this question.

synapsesocial.com/papers/69b4fc7fb39f7826a300d5achttps://doi.org/10.4187/respcare.20223773461
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