I:E Ratio in HFOV | 1:1 or 1:2? What Really Changes in Neonatal Ventilation

What does the I:E ratio actually do during High-Frequency Oscillatory Ventilation (HFOV) — and when should you use 1:1 versus 1:2? In this practical NICU teaching video, I explain how the inspiratory-to-expiratory ratio affects oscillatory flow, lung volume, gas exchange, CO₂ clearance, and hemodynamics in neonates on HFOV. You will learn: What I:E ratio means in HFOV The difference between 1:1 and 1:2 How changing inspiratory time alters the oscillatory cycle Whether a longer inspiratory phase can improve oxygenation How I:E ratio may affect CO₂ elimination The interaction between I:E ratio, frequency, amplitude, and DCO₂ Why airway resistance and lung disease matter The possible risk of incomplete expiration and gas trapping How I:E ratio can influence mean lung volume and hemodynamics Why the same setting may behave differently in RDS, BPD, air leak, or obstructive physiology When changing I:E ratio is useful — and when another ventilator adjustment may be more appropriate The key message is: I:E ratio in HFOV is not just a number — it changes the balance between inspiration and expiration, and its effect depends on the baby’s lung mechanics and the rest of the HFOV settings. This video is useful for neonatologists, NICU fellows, pediatricians, respiratory therapists, NICU nurses, residents, and medical students. #HFOV #IERatio #NeonatalVentilation #NICU #Neonatology #HighFrequencyVentilation #DCO2 #MechanicalVentilation #RespiratoryTherapy #NICUTeaching