Flow Matters

Keeping you up-to-date with emerging nasal high flow (NHF) clinical evidence and practice guidelines. 

Latest edition
Evidence is published weekly demonstrating the impact of NHF on improved patient care and outcomes. More than 600 studies have alreay been published this year.*

Updated Edition - March 2023

Early use of NHF in infants and children 

In this update we review the literature with the addition of the PARIS 2 trial and provides an evidence-based approach to implementation of NHF in pediatric patients.

Read online 

Download PDF

Latest edition  Download PDF

Share PDF via email

Evidence-based clinical practice guidelines

Hundreds of randomized controlled trials have been consolidated into clinical practice guidelines. 

These guidelines underscore the breadth of application of nasal high flow therapy.

We’ve created a table that will help you review the  guidelines by patient population and application.


Interactive table 

Updated July 2023


An analysis of published studies reveals the equipment most often used to deliver NHF and most used flow rates. 

A review conducted by F&P showed that the flow rates used in the published studies ranged from 10 L/min to 60 L/min, and 84% of the studies required flows ≥ 45 L/min.

Download PDF



Evidence-based guidelines recommend the use of NHF for COVID-19 patients.

Read about this and research related to airborne transmission.

Read online

Download PDF


ROX Index - a bedside tool for monitoring patients on NHF.

The validated ROX index uses just 3 data points to provide an indicator of outcomes in adults with AHRF receiving NHF therapy.

Author: Stanislav Taktov, M.D., Ph.D.

Read online

Download PDF


Subscribe to Flow Matters
If you have an enquiry about our products, please provide the following information so a Fisher & Paykel Healthcare representative can contact you. For further details on how this information will be used, see below or go to our privacy statement.
Enter security code:*
 Security code