P
AGE
10
1127179,
V
ER
.
02
D
REAM
S
TATION
B
I
PAP
S/T
AND
AVAPS
S
ERVICE
&
T
ECHNICAL
R
EFERENCE
M
ANUAL
Bi-Flex Comfort Feature
If enabled, the device provides a comfort feature called Bi-Flex. The Bi-Flex attribute adjusts therapy by in-
serting a small amount of pressure relief during the latter stages of inspiration and during active exhalation
(the beginning part of exhalation). Bi-Flex levels of 1, 2, or 3 progressively reflect increased pressure relief
that will take place at the end of inspiration and at the beginning of expiration.
Ramp
The device is equipped with an optional ramp feature. The ramp feature is designed to offer lower pressures
when activated and then gradually increase pressure over the set ramp period.
If ramp is activated with AVAPS and Automated Airway Management (AAM) disabled, it will reduce EPAP and
IPAP pressures to Ramp Start pressure and Ramp start pressure plus a Delta, and ramp up to the original
prescribed settings over the ramp time period. The Delta is the lesser of 2 cmH
2
O and the difference between
the IPAP and EPAP pressure settings.
If ramp is activated with AAM enabled, it will also reduce EPAP pressure to the EPAP Min setting, after which
EPAP shall change based on the airway’s resistance. If AVAPS is disabled, it will reduce the delivered PS to
approximately 2 cmH
2
O and ramp to the PS setting over the ramp time period.
If ramp is activated with AVAPS enabled, it will reduce the maximum pressure support capability to IPAP Min
or PS Min and ramp to the IPAP Max or PS Max over the ramp time period. During the ramp period, the pre-
scribed tidal volume may not be achieved.
