Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Comparing oxygen therapies for patients with acute respiratory failure

Official title: Effects of Face Mask Continuous Positive Airway Pressure Vs. Noninvasive Ventilation Vs. High-flow Nasal Oxygen on Intubation-free Survival in Acute Hypoxemic Respiratory Failure: the TRIPOD Randomized Clinical Trial

Run by Southeast University, China · NCT06795971 · Data updated 2026-11-12

This study is testing which of three oxygen therapies—CPAP, high-flow nasal oxygen, or non-invasive ventilation—works best to help adults with severe breathing problems avoid needing a breathing tube.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment1300 (estimated)
SponsorSoutheast University, China
Academic / other
Locations1 site (Nanjing, Jiangsu)
StatusRecruiting
StartedJanuary 23, 2025
Main results expectedOctober 31, 2027
Study endsDecember 31, 2027
Registry record updatedFebruary 26, 2025
Trial IDNCT06795971 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older experiencing acute hypoxemic respiratory failure requiring non-invasive oxygen support.

Probably not a fit

Patients who have already received non-invasive ventilation for more than 24 hours or have severe chronic lung disease may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the effectiveness of three non-invasive oxygenation strategies—Continuous Positive Airway Pressure (CPAP), High-flow Nasal Oxygen (HFNO), and Non-invasive Ventilation (NIV)—in preventing intubation in patients suffering from acute hypoxemic respiratory failure. The study aims to determine which method leads to higher rates of intubation-free survival. Participants will be adults aged 18 and older who meet specific criteria related to oxygen levels and respiratory support needs. The trial will compare outcomes among the different oxygenation strategies to identify the most effective approach.

Why it matters

Potential benefit: If successful, this study could significantly reduce the need for invasive mechanical ventilation in patients with acute respiratory failure.

How similar studies have gone: Previous studies have shown that non-invasive oxygenation strategies can be effective, but this specific comparison of CPAP, HFNO, and NIV is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age≥18 yrs;
2. A ratio of the partial pressure of arterial oxygen (PaO2) to the FiO2 of 300 mm Hg or less, or a ratio of pulse oximetry oxygen saturation (SpO2) to the FiO2 of 315 or less (SpO2≤97%) and the need for (1) noninvasive positive pressure ventilation with at least 5 cm H2O PEEP, or (2) high-flow nasal cannula at 30L/min or higher, or (3) standard oxygen with oxygen flow rate of at least 10 L/min;
3. Sign informed consent.

Exclusion Criteria:

1. Patients that have already received Continuous positive airway pressure, Noninvasive ventilation continuously for more than 24 hours before the screening visit.
2. Previous bout of mechanical ventilation during index hospitalization.
3. Exacerbation of chronic lung disease, including asthma or chronic obstructive pulmonary disease.
4. Moderate to severe cardiac insufficiency (New York Heart Association class \>II or left ventricular ejection fraction\<50%) or cardiogenic pulmonary edema.
5. Hemodynamic dysfunction, defined as vasopressor dose \> 0.3 µg/kg/min of norepinephrine-equivalent to maintain systolic blood pressure \> 90 mm Hg.
6. Impaired consciousness with a Glasgow coma score ≤ 12.
7. Patients with urgent need for intubation, including respiratory or cardiac arrest, respiratory pauses with loss of consciousness or gasping for air, severe hypoxemia defined as SpO2 lower than 90% despite maximal oxygen support.
8. Patients with contraindication to NIV according to the French consensus conference, patient refusal, cardiorespiratory arrest, coma, non-drained pneumothorax, unresolved vomiting, upper airway obstruction, hematemesis or severe facial trauma, thoracic or abdominal surgery in the previous 7 days.
9. A do-not-intubate order at time of inclusion.
10. Pregnancy.

Where it's running

  • Zhongda Hospital, School of Medicine, Southeast University
    Nanjing, Jiangsu, China
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.