Philips BiPAP A40 - 2.2.4 Rise Time; 2.2.5 Digital Auto-Trak

BiPAP A40 user manual
16
2.2.4 Rise Time
If enabled, the device provides
a feature called Rise Time in S,
S/T, T, PC, and AVAPS-AE modes.
Rise time is the amount of time it
takes the device to change from
the expiratory pressure setting to
the inspiratory pressure setting.
Rise time levels of 1, 2, 3, 4, 5, or
6 progressively reect slowed
response of the pressure increase that will take place at the beginning of inspiration. A setting of
1 is the fastest rise time while a setting of 6 is the slowest. Adjust the rise time to nd the most
comfortable setting for the patient. Rise time cannot be adjusted when Bi-Flex is enabled.
2.2.5 Digital Auto-Trak
An important characteristic of the device is its ability to recognize and compensate for
unintentional leaks in the system and to automatically adjust its trigger and cycle algorithms to
maintain optimum performance in the presence of leaks. This feature is known as Digital Auto-Trak.
The device continuously monitors ow and adjusts the estimate of patient ow as circuit leak
changes. The compensation provides a better estimate of patient ow to be used to track patient
breathing patterns and calculate ow-based parameters, such as exhaled tidal volume.
The device continually tracks breathing patterns and automatically adjusts sensitivity thresholds
to ensure optimum patient and machine synchrony as breathing patterns change or as circuit
leak varies.
Sensitive Auto-Trak is an enhancement to the Auto-Trak algorithm that improves patient and
machine synchrony for patients with minimal respiratory eort. Sensitive Auto-Trak renes the
baseline trigger and cycle sensitivity thresholds.
PRESSURE
IPAP
EPAP
TIME
Rise Time