P
AGE
8
1127179,
V
ER
.
02
D
REAM
S
TATION
B
I
PAP
S/T
AND
AVAPS
S
ERVICE
&
T
ECHNICAL
R
EFERENCE
M
ANUAL
*yy and zz are variables that represent regional configurations, i.e. DOM or INTL models.
X is fixed and represents the DreamStation platform.
*A model ending in a C signifies a Cellular modem was installed in the device as part of the finished good.
** A model ending in a W signifies a Wi-Fi modem was installed in the device as part of the finished good.
Device Description
The devices are intended to augment patient breathing by supplying pressurized air through a patient circuit.
They sense the patient’s breathing effort by monitoring airflow in the patient circuit and adjusts its output to
assist in inhalation and exhalation. This therapy is known as Bi-level ventilation. Bi-level ventilation provides a
higher pressure, known as IPAP (Inspiratory Positive Airway Pressure), when inhaling, and a lower pressure,
known as EPAP (Expiratory Positive Airway Pressure), when exhaling. The higher pressure supports inhala-
tion, and the lower pressure makes it easier to exhale.
When prescribed, the device can also provide features to help make therapy more comfortable. The ramp
function allows you to lower the pressure when trying to fall asleep. The air pressure will gradually increase
until the prescription pressure is reached. Additionally, the Flex comfort feature provides increased pressure
relief during the expiratory phase of breathing.
United States
The BiPAP S/T and AVAPS devices are intended to provide non-invasive ventilatory support to treat adult and
pediatric (> 7 years of age; > 40 Ibs) patients with obstructive Sleep Apnea (OSA) and Respiratory Insuffi-
ciency. These devices may be used in the hospital or home.
Rest of World
The BiPAP S/T and AVAPS devices are intended to provide non-invasive ventilatory support to Obstructive
Sleep Apnea (OSA) and Respiratory Insufficiency patients weighing over 18 kg. These devices may be used
in the hospital or home.
Therapy Modes
Therapy Mode
Description
CPAP
Continuous Positive Airway Pressure; CPAP maintains a
constant level of pressure throughout the breathing cycle.
S
Spontaneous Pressure Support; A Bi-level therapy mode
where breaths are patient-triggered and patient-cycled.
The device triggers to IPAP (Inspiratory Positive Airway
Pressure) in response to spontaneous inspiratory effort
and cycles to EPAP (Expiratory Positive Airway Pressure)
during exhalation. The device also cycles a patient-trig-
gered breath if no patient exhalation effort is detected for
3 seconds. The level of Pressure Support delivered is de-
termined by the difference between the IPAP and EPAP
settings (PS = IPAP - EPAP)
S/T
Spontaneous/Timed Pressure Support; A Bi-level therapy
mode where each breath is patient-triggered and patient-
cycled or machine-triggered and machine-cycled. S/T
mode is similar to S mode, except that the device also will
enforce a set minimum breath rate by, if necessary,
