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Related Experiment Video

Updated: Dec 1, 2025

Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow
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Flow-synchronized NIPPV with double-inspiratory loop cannula: An in vitro study.

Corrado Moretti1, Gianluca Lista2, Virgilio Carnielli3,4

  • 1Emeritus Consultant in Paediatrics, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy.

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Summary

A new low-resistance double-inspiratory loop cannula (DILC) shows good pressure transmission for flow-synchronized nasal intermittent positive pressure ventilation (SNIPPV) in neonates. This interface offers optimal performance, potentially improving noninvasive ventilation in neonatal intensive care units.

Keywords:
RDSdouble-inspiratory loop cannulanoninvasive ventilationpreterm infantsynchronized-NIPPV

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Related Experiment Videos

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Area of Science:

  • Neonatal respiratory support
  • Noninvasive ventilation interfaces
  • Respiratory mechanics

Background:

  • Short binasal prongs (SBP) are common for noninvasive ventilation.
  • Double-inspiratory loop cannulas (DILC) offer reduced nasal trauma and increased comfort.
  • Higher intrinsic resistance of DILCs may compromise ventilation efficacy.

Purpose of the Study:

  • To evaluate a new, low-resistance DILC interface for neonatal noninvasive ventilation.
  • To assess the performance of the Sync-flow Cannula® during simulated neonatal respiratory distress.

Main Methods:

  • A test lung simulated preterm neonates (500-2000g BW) with respiratory distress syndrome.
  • The Sync-flow Cannula® was tested with nasal continuous positive airway pressure (NCPAP) and flow-synchronized nasal intermittent positive pressure ventilation (SNIPPV).
  • Comparisons were made with Neotech RAM® cannula and Ginevri SBP® regarding flow/pressure, resistance, pressure drop, and system response time with ~30% leaks.

Main Results:

  • The Sync-flow Cannula® demonstrated the lowest flow-pressure ratio among tested DILC sizes.
  • RAM® cannula exhibited significantly higher resistance (p < .001) compared to other interfaces.
  • Pressure drop from ventilator to alveoli ranged from 4-38% with ~30% leaks; system response time was excellent (~65-70 ms).

Conclusions:

  • The Sync-flow Cannula® provides good pressure transmission and optimal performance for flow-SNIPPV with ~30% leaks.
  • This low-resistance DILC interface shows promise for neonatal noninvasive ventilation.
  • Clinical studies are warranted to confirm the clinical relevance of these findings.