Gradian CCV, User Manual

Page: 13 / 44

11
Pressure Support
may be added to Volume SIMV, Pressure SIMV, and
CPAP modes or used on its own by selecting an SIMV mode and
changing the BPM to 0. The ventilator will deliver flow to elevate the
airway pressure to the Pressure Support target and maintain it at the
target level until the flow required to do so falls below 2 liters per
minute. Pressure support ranges from 0 to 25 cmH
2
O.
When used with CPAP, the Pressure Support feature turns CPAP into a
BiPAP ventilation mode. As an example, setting Pressure Support to 15
and CPAP to 10 results in an airway pressure of 15 cmH
2
O during
inhalation and 10 cmH
2
O during exhalation.
Trigger Sensitivity defines the level of effort needed to trigger an
assisted breath, or register as a spontaneous breath. It ranges from 1 to
5 cmH
2
O.
Alarm Settings
High Pressure Alarm sets the maximum allowable
airway pressure and is adjustable from 15 to 55
cmH
2
O. When exceeded, flow halts and the CCV
provides both audible and visual alarms.
Low Pressure Alarm sets the minimum allowable
airway pressure and is adjustable from 5 to 20
cmH
2
O. It will also trigger audible and visual
alarms when pressure falls below the set limit.
Ventilation Modes
Volume Control with Assist (Volume AC)
In volume control the ventilator delivers the set
tidal volume programmed by the clinician in a
cycle determined by the settings for inspiratory
time and respiration rate. The flow rate is constant
during inspiration and calculated to deliver the set
tidal volume during the inspiratory time.
Assist Control means that the ventilator will
deliver at minimum the number of breaths entered by the clinician on
the BPM setting. If the ventilator detects an effort by the patient to take
a breath it will initiate a breath to assist the patient in that spontaneous
respiration. The tidal volume will be the same for both patient- and
ventilator-triggered breaths.