Pulmonology · Internal Medicine · 2 h ago
High-flow oxygen during NIV breaks shows no adjusted benefit after extubation
An analysis pooling individual patient data from two multicentre trials found a crude association between high-flow nasal oxygen during breaks from prophylactic noninvasive ventilation (NIV) and fewer extubation failures. The association was no longer statistically significant after adjustment, but the comparison was observational and cannot establish equivalence.
- Crude extubation-failure rates favored high-flow oxygen during NIV breaks.
- The association was not statistically significant after adjustment.
- Oxygen strategy was not randomized in either pooled trial.
- A randomized comparison is needed to assess benefit and subgroups.
Preventing reintubation after extubation in high-risk patients must be balanced against avoiding delays when reintubation is necessary. Thille and colleagues examined whether high-flow nasal oxygen or standard oxygen should be used during breaks from prophylactic NIV, pooling individual patient data from two multicentre trials. Neither trial randomized patients to the oxygen strategy being compared, and the pooled groups differed substantially in trial of origin.
By day 7, extubation failure occurred in 13.7% of patients receiving high-flow oxygen and 18.5% receiving standard oxygen, a crude difference of −4.7 percentage points (95% CI −9.4 to −0.3; p=0.036). After adjustment using G-computation, the estimated difference was −3.9 points (95% CI −8.7 to 0.9), no longer statistically significant.
The commentary emphasizes that this observational comparison is vulnerable to confounding and classification bias; adjustment cannot eliminate unmeasured confounding, and the pooled sample was not sized for this comparison. The findings do not show that the strategies are equivalent, but do not establish an average benefit from routinely using high-flow oxygen during NIV breaks. A randomized trial, including assessment of potentially responsive subgroups, is needed. Any post-extubation support strategy should not delay reintubation when required.
In practice
For high-risk adults receiving prophylactic NIV after extubation, this pooled observational comparison does not establish that high-flow nasal oxygen during NIV breaks reduces extubation failure compared with standard oxygen. The crude difference favored high-flow oxygen, but the adjusted estimate was not statistically significant. Because oxygen strategy was not randomized, trial of origin was strongly associated with strategy, and residual confounding and limited power remain possible, the results do not establish equivalence or justify a definitive change in practice. A randomized trial is needed.
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Intensive Care Medicine: Optimizing post-extubation respiratory support in high-risk patients ↗This is an automated AI-condensed summary that has not yet been reviewed by an editor. Always consult the full item at the original source.