An Evaluation of 2 New Devices for Nasal High-Flow Gas Therapy

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.


BACKGROUND: The traditional nasal cannula with bubble humidifier is limited to a maximum flow of 6 L/min to minimize the risk of complications. We conducted a bench study of 2 new Food and Drug Administration-approved nasal cannula/humidifier products designed to deliver at flows > 6 L/min. METHODS: Using a digital psychrometer we measured the relative humidity and temperature of delivered gas from each device, at 5 L/min increments over the specified functional high-flow range. RESULTS: The Salter Labs unit achieved 72.5–78.7% relative humidity (5–15 L/min range) at ambient temperature (21–23°C). The Vapotherm device achieved 99.9% relative humidity at a temperature setting of 37°C (5–40 L/min). CONCLUSIONS: Both devices meet minimum humidification standards and offer practical new treatment options. The patient-selection criteria are primarily the severity of the patient's condition and cost.


Document Type: Research Article

Affiliations: Respiratory Therapy Program, Critical Care Department, University of Alabama at Birmingham, Birmingham, Alabama

Publication date: August 1, 2004

More about this publication?
Related content



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more