Evidence map›Paper›PMID 39009460›Full record

SynthesisBMJ open respiratory research2024

High-flow nasal oxygen therapy compared with conventional oxygen therapy in hospitalised patients with respiratory illness: a systematic review and meta-analysis.

Daniel Seow, Yet H Khor, Su-Wei Khung, David M Smallwood, Yvonne Ng, Amy Pascoe, Natasha Smallwood

Abstract readSystematic ReviewMeta-AnalysisComparative Study
In one paragraph

Synthesis in BMJ open respiratory research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed.

  1. Article
  2. Article
  3. PaCOJournal of clinical medicine · 2026
    Review
  4. Article
  5. Article
  6. Review
  7. Article
  8. PaCOFrontiers in medicine · 2026
    Review
  9. Review
  10. Improving internal medicine resident proficiency in non-invasive positive pressure ventilation and oxygen modalities through simulation training.Canadian journal of respiratory therapy : CJRT = Revue canadienne de la therapie respiratoire : RCTR · 2026
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Observational
  16. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Daniel SeowDepartment of Internal Medicine, Sengkang General Hospital, Singapore.ORCID http://orcid.org/0009-0001-7390-6714
Yet H KhorRespiratory Research@Alfred, Central Clinical School, Monash University, Melbourne, Victoria, Australia.
Su-Wei KhungDepartment of Respiratory and Sleep Medicine, Austin Health, Heidelberg, Victoria, Australia.
David M SmallwoodDepartment of Respiratory Medicine, Western Health, Footscray, Victoria, Australia.
Yvonne NgMonash Lung, Sleep, Allergy and Immunology, Monash Health, Clayton, Victoria, Australia.
Amy PascoeRespiratory Research@Alfred, Central Clinical School, Monash University, Melbourne, Victoria, Australia.ORCID http://orcid.org/0000-0002-3555-6856
Natasha SmallwoodRespiratory Research@Alfred, Central Clinical School, Monash University, Melbourne, Victoria, Australia natasha.smallwood@monash.edu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHigh-flow nasal oxygen therapy (HFNO) is used in diverse hospital settings to treat patients with acute respiratory failure (ARF). This systematic review aims to summarise the evidence regarding any benefits HFNO therapy has compared with conventional oxygen therapy (COT) for patients with ARF.

methodsThree databases (Embase, Medline and CENTRAL) were searched on 22 March 2023 for studies evaluating HFNO compared with COT for the treatment of ARF, with the primary outcome being hospital mortality and secondary outcomes including (but not limited to) escalation to invasive mechanical ventilation (IMV) or non-invasive ventilation (NIV). Risk of bias was assessed using the Cochrane risk-of-bias tool (randomised controlled trials (RCTs)), ROBINS-I (non-randomised trials) or Newcastle-Ottawa Scale (observational studies). RCTs and observational studies were pooled together for primary analyses, and secondary analyses used RCT data only. Treatment effects were pooled using the random effects model.

results63 studies (26 RCTs, 13 cross-over and 24 observational studies) were included, with 10 230 participants. There was no significant difference in the primary outcome of hospital mortality (risk ratio, RR 1.08, 95% CI 0.93 to 1.26; p=0.29; 17 studies, n=5887) between HFNO and COT for all causes ARF. However, compared with COT, HFNO significantly reduced the overall need for escalation to IMV (RR 0.85, 95% CI 0.76 to 0.95 p=0.003; 39 studies, n=8932); and overall need for escalation to NIV (RR 0.70, 95% CI 0.50 to 0.98; p=0.04; 16 studies, n=3076). In subgroup analyses, when considering patients by illness types, those with acute-on-chronic respiratory failure who received HFNO compared with COT had a significant reduction in-hospital mortality (RR 0.58, 95% CI 0.37 to 0.91; p=0.02). DISCUSSION: HFNO was superior to COT in reducing the need for escalation to both IMV and NIV but had no impact on the primary outcome of hospital mortality. These findings support recommendations that HFNO may be considered as first-line therapy for ARF. PROSPERO REGISTRATION NUMBER: CRD42021264837.

Indexed as

Hospital MortalityOxygen Inhalation TherapyRespiratory InsufficiencyHospitalizationHumansNoninvasive VentilationRandomized Controlled Trials as TopicRespiration, ArtificialTreatment OutcomeCOPD ExacerbationsCOVID-19Critical CareNon invasive ventilationPneumonia

Identifiers

PMID39009460
PMCPMC11268052

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.