English 7
More about iVAPS
You may prefer some assurance that the patient’s ventilatory needs will be defended if their
condition varies. A variety of ‘dual mode’ schemes exist, that aim to combine the benefits of
pressure target and volume target, most of which can be categorized generically as volume-assured
pressure support (VAPS) modes.
With VAPS devices in general, the ventilatory assistance (pressure support) aims to automatically
adjust to changes in patient condition over time, typically to maintain a target tidal volume.
iVAPS offers the comfort and synchrony of pressure support, but with the assurance offered by a
volume target. iVAPS has the following advantages over traditional VAPS schemes:
• iVAPS is a unique combination for a servo-controlled ventilator, in that iVAPS has the goal of
regulating alveolar ventilation to a prescribed target.
• iVAPS has an intelligent Backup Rate (iBR) which aims to keep ‘out of the way’ while the patient
is breathing, yet during sustained apnoea will mimic the patient’s own breath rate. This
contributes to iVAPS’ ability to maintain its ventilation target and so stabilise blood gases even
during sleep.
• iVAPS has ResMed’s leak compensation algorithm (Vsync). This promotes synchrony and
comfort even during significant leak.
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