Randomized controlled trial shows active humidification reduces secretion viscosity in tracheostomy patients, suggesting benefits for drainage.
Active subglottic airway humidification prior to IASS significantly reduces the positive rate of occult blood (OB) tests, the incidence of drainage catheter blockage, and secretion viscosity, with the exception of the incidence of VAP. It also stabilizes cuff pressure with minimal fluctuation. Although the intervention is associated with a decrease in exhaled tidal volume, it has no significant impact on pulse oxygen saturation or end-tidal carbon dioxide pressure.
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Liu et al. (2025) studied this question.
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