Which statement best describes inspiratory time (Ti) in neonates and children?

Which statement best describes inspiratory time (Ti) in neonates and children?

• A. Ti is typically expressed in seconds for both groups.
• B. Ti is measured in breaths per minute.
• C. Ti is not adjustable on ventilators.
• D. Ti is defined as the difference between PIP and PEEP.

Answer: (A)

Ti is the duration of the inspiratory phase of each breath, and in neonates and children it is expressed in seconds. Using seconds to define Ti lets you set the actual time the inspiratory valve remains open, which directly influences the I:E ratio and mean airway pressure, independent of how fast the patient is breathing. This timing parameter is adjustable on modern ventilators to optimize ventilation and lung mechanics for different ages and conditions. Ti is not a rate or breaths-per-minute measure (that would be respiratory rate), and it is not the pressure difference between PIP and PEEP (which describes driving pressure) and thus reflects time, not pressure.

Ti is the duration of the inspiratory phase of each breath, and in neonates and children it is expressed in seconds. Using seconds to define Ti lets you set the actual time the inspiratory valve remains open, which directly influences the I:E ratio and mean airway pressure, independent of how fast the patient is breathing. This timing parameter is adjustable on modern ventilators to optimize ventilation and lung mechanics for different ages and conditions. Ti is not a rate or breaths-per-minute measure (that would be respiratory rate), and it is not the pressure difference between PIP and PEEP (which describes driving pressure) and thus reflects time, not pressure.