Time Constant & Inspiratory Time in Neonatal Ventilation | How to Set Ti Correctly

How does the lung time constant determine the appropriate inspiratory time (Ti) during neonatal mechanical ventilation? In this video, we explain the relationship between compliance, airway resistance, time constant, and inspiratory time and show how these concepts can help optimize ventilation in newborn infants. You will learn: What the neonatal lung time constant (τ) means How to calculate it: τ = Resistance × Compliance How compliance and resistance influence lung filling and emptying Why approximately 63% filling occurs after 1 time constant, 86% after 2, and 95% after 3 How the time constant helps guide inspiratory time (Ti) What happens when Ti is too short What happens when Ti is too long Why babies with RDS and low compliance generally have shorter time constants Why babies with BPD or airway obstruction may have longer time constants How to use ventilator waveforms to assess whether inspiration is adequate Practical bedside considerations for improving neonatal ventilation and patient–ventilator synchrony Understanding the relationship between time constant and inspiratory time can help achieve adequate tidal-volume delivery while reducing unnecessary pressure exposure and allowing sufficient time for expiration. This video is useful for neonatologists, pediatricians, NICU nurses, respiratory therapists, residents, fellows, and medical students involved in neonatal respiratory care. #NeonatalVentilation #TimeConstant #InspiratoryTime #NICU #MechanicalVentilation #Neonatology #VentilatorWaveforms #RDS #BPD #NewbornCare