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General information
1-24
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
RISE TIME
FACTOR
(760 only)
The time for inspiratory pressure to rise from
0 to 95% of the target pressure level during a
PCV breath.
A setting of 100 = a 100-msec rise time, and a
setting of 5 = 80% of the inspiratory time or
2500 msec, whichever is less.
When this setting is changed, the message
window shows the actual time (in seconds) to
reach 95% of target pressure.
5 to 100
NOTE:
To help determine the correct setting for inspiratory time, during PCV the message
window displays peak inspiratory flow, end inspiratory flow, and end exhalation flow in
L/min.
Spontaneous (PSV) settings
SUPPORT
PRESSURE
Pressure above PEEP maintained during
spontaneous inspiration. Support pressure is
terminated when inspiratory flow falls to 25%
of peak inspiratory flow, or to the exhalation
sensitivity setting (760 only), or 10 L/min or
25% of peak flow, whichever is lower (740
only). Maximum inspiratory time is 3.5 seconds
for adults, and 2.5 seconds for pediatric
patients.
0 to 70 cmH
2
O (0 to 70 hPa)
Accuracy:
±
(3 + 2.5% of setting) cmH
2
O
RISE TIME
FACTOR
(760 only)
The time for inspiratory pressure to rise from
0 to 95% of the target pressure level during a
PSV breath.
A setting of 100 = a 100-msec rise time, and a
setting of 5 = 80% of the inspiratory time or
1500 msec (when an adult ventilator breathing
circuit is selected) or 600 msec (when a
pediatric circuit is selected), whichever is less.
When you adjust this setting, the message
window shows the actual time (in seconds) to
reach 95% of target pressure.
5 to 100
EXH SENSITIVITY
(760 only)
The percent of peak expiratory flow at which
the ventilator cycles from inspiration to
exhalation for spontaneous breaths. The flow
at which the ventilator cycles from inspiration
to exhalation for PSV breaths. Exhalation
begins when the inspiratory flow is less than
the set value.
To help set EXH SENSITIVITY appropriately, the
peak inspiratory flow and end inspiratory flow
are displayed in the message window in PSV.
1 to 80%*
* For ventilators equipped with software
revision J or later.
Common settings
PEEP/CPAP
Positive end expiratory pressure/continuous
positive airway pressure. Minimum pressure
maintained during inspiratory and expiratory
phases.
0 to 35 cmH
2
O (0 to 35 hPa)
Accuracy:
±
(2 cmH
2
O + 4% of setting)
Table 1-10: 700 Series Ventilator keyboards: VENTILATOR SETTINGS (continued)
Key/indicator
Specifies...
Range
Summary of Contents for Puritan Bennett 700 Series
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