Epr Technology; Triggering And Cycling; Leak Management - Vsync; Rise Time Adjustment - ResMed S9 VPAP Series Clinical Manual

Mode
VAuto mode
The AutoSet algorithm automatically adjusts pressure in
response to flow limitation, snore and apneas. Pressure
support (PS) can be set and is fixed throughout the night.
Min EPAP and Max IPAP restricts the delivered pressure
range.

EPR technology

(CPAP mode) Designed to make therapy more comfortable, EPR maintains optimal treatment for the
patient during inhalation and reduces the delivered mask pressure during exhalation.
EPR checklist
ü You can set EPR to Off, Ramp Only, Full Time.
ü You can select an EPR Level of Off, 1, 2, 3 cm H
ü In CPAP mode you can set the EPR Inhale to Med or Fast.
ü When EPR is enabled, the delivered pressure will not drop below a minimum pressure of 4 cm H
regardless of the settings.

Triggering and cycling

(S, ST and VAuto modes) Under normal conditions, the VPAP triggers (initiates IPAP) and cycles
(terminates IPAP and changes to EPAP) as it senses the change in patient flow. Patient breath detection
is enhanced by the VPAP's automatic leak management feature—Vsync.
In addition, the VPAP has adjustable trigger/cycle sensitivity to optimize the sensing level according to
patient conditions.
Patient
flow
Leak management – Vsync
Vsync monitors and compensates for leak by continuously and automatically adjusting the baseline flow.
This enables reliable triggering and cycling while maintaining the set pressures.

Rise time adjustment

(S, ST and T modes) Rise time sets the time taken for the VPAP to reach IPAP . The greater the rise time
value, the longer it takes for pressure to increase from EPAP to IPAP .
Patients with a high ventilatory demand may prefer a shorter rise time, while patients who are slow
breathers may prefer a longer rise time.
Note: A prolonged rise time inhibits fast pressurization, therefore, rise time should not be set longer than
Ti Max or the patient's normal inspiratory time.
Adjustable trigger
sensitivity
Very low
Medium
Low
High
Very High
™
VPAP Auto
ü
O or Patient (configurable by the patient).
2
Adjustable cycle
sensitivity
Patient
flow
EPAP
VPAP ST VPAP S
Very High
High
Medium
Low
Very low
EPAP
O,
2
5
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