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intelligent Backup Rate (iBR)
ST and iVAPS modes only
Instead of mandating a fixed backup rate, the intelligent Backup Rate (iBR) will shift automatically
between two limits.
During sustained apnoea, the iBR will adopt a pre-configured Target Patient Rate. This Target Patient
Rate defines the upper boundary for iBR. Set the Target Patient Rate to match the patient’s average
spontaneous rate (unlike a traditional backup rate).
During spontaneous ventilation, the iBR adjusts to remain in the background, at two-thirds of the
Target Patient Rate. This ‘background’ backup rate is lower than a traditional S/T rate, so gives the
patient maximum opportunity to spontaneously trigger.
When spontaneous triggering ceases (eg, at the onset of an apnoea/hypopnoea), the iBR adjusts
from its background frequency to its Target Patient Rate in iVAPS mode and adjusts quickest (within
4 to 5 breaths) when ventilation is below the target ventilation. In ST mode, iBR adjusts to the
Target Patient Rate at a fixed 5 breaths.
A single spontaneous triggered breath resets the iBR to its background rate (two-thirds of Target
Patient Rate).
