Wider body of evidence
To further investigate the body of evidence (beyond that analyzed in the four meta analyses3-6
), the survey method was repeated for the 49 acute adult NHF controlled studies10-23,25-59
, with subjects n ≥ 38, found using a systematic search of the PubMed
database. Again, the reported ﬂow rates ranged between 10 L/min and 60 L/min with distribution favouring the higher end of the range (82% of the studies required ﬂows ≥ 45 L/min). The ﬂow rates reported in the 49 controlled studies are shown in the chart below.
Of the 49 controlled studies 92% used F&P Optiﬂow systems, including a F&P Optiﬂow patient interface and a F&P humidity delivery system with humidity setting of 37oC.
When selecting a NHF system, it is important to ensure the entire system, including device capabilities such as ﬂow rate and humidity delivery, can provide the therapy to deliver the expected outcomes proven in the clinical body of evidence.