Respiratory failure & ventilation

Closed-loop versus conventional synchronization in spontaneously breathing adult patients– a randomized controlled study

J Crit CarePublished Randomised controlled trial

Authors' conclusion

Closed-loop synchronization using IS+ significantly improved patient-ventilator interaction and comfort during NIV in adults with acute respiratory failure with no adverse events observed during the study period.

Study context

Population
Spontaneously breathing adults receiving NIV for ARF, two tertiary hospitals, March 2024–May 2025
Comparison
IS+ vs Conventional synchronization
Primary endpoint
Asynchrony Index (AI): asynchronous events per 100 breaths
Methodological detailsmulticentre, prospective, single-blind, crossover
  • Multicentre
  • Prospective
  • Single-blind
  • Crossover

Primary result

As reported in the abstract

Total AI

P < 0.001

Further findings

OutcomeIS+Conventional synchronizationP value
Major asynchrony index8.3 (range 4.5–16.4)17.6 (range 7.5–25.6)P < 0.001
Minor asynchrony index3.4 (range 1.5–5.4)7.6 (range 3.4–13.6)P < 0.001
Dyspnea score3 ± 15 ± 1P = 0.0001

Safety

No adverse events observed during the study period

Original publication

Closed-loop versus conventional synchronization in spontaneously breathing adult patients– a randomized controlled study. J Crit Care. Published 14 August 2026. doi:10.1016/j.jcrc.2026.155705

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