Target Patient Rate - ResMed VPAP ST-A User Manual

Target Patient Rate

iVAPS has a novel approach to providing a backup rate. Instead of mandating a fixed backup rate, iVAPS'
intelligent Backup Rate (iBR) will shift automatically between two limits, according to the context. The
benefit of this approach is improved synchrony, while maximising iVAPS' ability to maintain the target
ventilation, at minimal pressure support.
• During sustained apnoea, the iBR will adopt a pre-configured Target Patient Rate. This Target Patient
Rate defines the upper boundary for iBR. You 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 well 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. It will adjust quickest (within 4–5 breaths)
when ventilation is below the target ventilation.
• A single spontaneous triggered breath resets the iBR to its background rate (two-thirds of Target
Patient Rate).
iBR brings the patient back on target when back-up breaths are required
15
10
8
Patient effort
Target patient rate Patient spontaneous rate
No Patient effort
Time
iVAPS intelligent back-up rate (iBR)
Patient effort