Synchronising non-invasive ventilation in preterm infants cut extubation failure

Design

systematic review and meta-analysis of clinical studies, 1990-2026, low to moderate risk of bias

Population

2864 preterm infants across 49 studies

Primary outcome

extubation failure, plus physiological and technical synchronisation outcomes

Effect

extubation failure risk ratio 0.38 (95% CI 0.17-0.85, p=0.03) versus nasal CPAP

Whether nasal intermittent positive pressure ventilation should be synchronised to the infant's own breaths, and by what trigger, has been argued for three decades without a comprehensive synthesis. This review identified all clinical studies in preterm infants comparing synchronised nasal intermittent positive pressure ventilation with other non-invasive modes or comparing trigger modalities, from 1990 to 2026: 49 studies and 2864 infants, at low to moderate risk of bias.

Extubation failure fell against nasal CPAP, with a risk ratio of 0.38 (95% CI 0.17 to 0.85, p = 0.03). Physiological outcomes - breathing effort in particular - improved consistently against both nasal CPAP and unsynchronised ventilation. On the technical comparisons, neurally adjusted ventilatory assist achieved the lowest patient-ventilator asynchrony, synchronisation rates of 80% to 99% and a trigger delay of about 35 ms, outperforming other synchronisation methods.

The authors are careful and so should the reader be. The physiological and technical case is consistent; the clinical case rests on one pooled outcome with a wide interval, and evidence on longer-term major outcomes such as bronchopulmonary dysplasia and neurodevelopment remains limited. Synchronisation looks like the right direction of travel rather than a settled standard, and the choice of trigger is a device and cost decision as much as a clinical one.

• The strongest evidence is physiological and technical; the clinical evidence rests on a single pooled outcome.
• Neurally adjusted ventilatory assist synchronised best, but it is the most expensive and most training-dependent option.
• No conclusion is available on bronchopulmonary dysplasia or neurodevelopmental outcome.
• Where synchronisation is unavailable, nasal CPAP remains a defensible standard on this evidence.
• In units without the catheters or consumables for neurally adjusted assist, flow or pressure triggering still delivered synchronisation benefits.

Why it matters

It shifts the synchronisation question from opinion to evidence, while showing the clinical outcome data are thinner than the physiological case suggests.

Don't overread it

Reduced extubation failure and breathing effort are short-term outcomes; nothing here shows benefit for bronchopulmonary dysplasia or neurodevelopment.

The statistics, in plain English

A risk ratio of 0.38 sounds dramatic, but the confidence interval runs from 0.17 to 0.85 - the benefit could be a 15% relative reduction or an 83% one. That width, with 49 heterogeneous studies behind it, reflects genuinely varied populations and protocols. A p value of 0.03 alongside an interval that nearly touches 1.0 is a result to act on cautiously, not a settled effect size.

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