Assist Control; Simv; Cpap; Manual - BIO-MED DEVICES CROSSVENT-3+ Operation & Service Manual

III. SPECIFICATIONS, CONNECTIONS & USER INTERFACE cont'd.
Ventilation modes:
A S S I S T C O N T R O L ( A / C ) A S S I S T C O N T R O L ( A / C )
A S S I S T C O N T R O L ( A / C ) A S S I S T C O N T R O L ( A / C )
Provides controlled or assist/control ventilation depending
upon the Pressure Trigger setting (see below). If the patient
fails to initiate an inspiration, the CROSSVENT will continue
to cycle at the respiratory rate set with the RATE control.
S I M V S I M V S I M V S I M V
(Synchronized Intermittent Mandatory Ventilation) mode -
Provides spontaneous and intermittent assisted breaths.
unit will respond to the patient's initiation of spontaneous
breaths according to the PRESSURE TRIGGER setting (see
below). A breath will be delivered at a flow rate set with the
FLOW control and for the length of time of a normal
inspiration as set with the TIDAL VOLUME
setting, if available).
bolus of gas flows to the patient at PEEP or atmospheric
pressure. The patient inspires the amount desired and the rest is passed through the exhalation valve to
atmosphere. At intervals set with the SIMV RATE, a triggered breath is provided under pressure
(synchronized mandatory breath). If the patient's rate falls below the set SIMV Rate, the Crossvent will
deliver pressurized back-up breaths at the set SIMV rate.
C P A P C P A P C P A P C P A P
(Continuous Positive Airway Pressure)/Manual mode - Provides spontaneous breaths at PEEP or
atmospheric pressure (see spontaneous breaths under SIMV above).
operative in this mode.
WARNING: It is extremely important that the Pressure Trigger control be carefully
adjusted to assure proper operation in the CPAP mode.
WARNING: Under certain conditions in CPAP, in particular with high flows and low
CPAP pressures, if the low peak pressure alarm is set so that no false alarms occur,
this alarm may be inoperative if a disconnect occurs.
M A N U A L M A N U A L
M A N U A L M A N U A L
Operative only in the CPAP mode. Provides one normal controlled breath each time it is pressed,
providing an inspiratory time and tidal volume as established by the Tidal Volume (or INSP time) and
Flow controls. The minimum expiratory time allowed is 0.2 seconds. This is controlled by the software
which means it will only be active in 0.2-second intervals or greater.
P R E S S U R E T R I G G E R P R E S S U R E T R I G G E R
P R E S S U R E T R I G G E R P R E S S U R E T R I G G E R
Sets the trigger level below baseline (PEEP or atmospheric) at which an inspiration is initiated.
automatically adjusts for the PEEP level. It is functional in all modes and must be set for use during
assisted and spontaneous breaths. It may be set to sense negative pressure changes from 10 cmH
cmH O below baseline. It should be set after setting the flow and may need to be readjusted if the flow
2
setting is changed.
WARNING: When setting Pressure Trigger, auto-triggering or missed breaths may
occur due to various conditions including, but not limited to compliance, resistance,
rate, flow, PEEP, I:E ratio, and circuit characteristics.
WARNINGS: It is extremely important that the Pressure Trigger control be carefully
adjusted to assure proper operation in the SIMV and CPAP modes.
certain conditions in SIMV with PEEP, even though the low peak pressure alarm is
set correctly for assisted breaths, there may be no low peak pressure alarm following
a patient disconnect until the next assisted breath. This period may be up to 2
minutes.
P R E S S U R E S U P P O R T P R E S S U R E S U P P O R T P R E S S U R E S U P P O R T P R E S S U R E S U P P O R T
May be set from 1 to 50 cmH
Arrows. When pressure support is on, it pressurizes spontaneous breaths up to the pressure support setting.
When this pressure is achieved, the exhalation valve is allowed to return to baseline pressure, but flow
remains on for the duration of a normal assisted breath as set by the TIDAL VOLUME (or INSP, if
available) control.
NOTE: Pressure Support is only active during SIMV and CPAP, but may be set at any time.
During these spontaneous breaths, a
O above baseline or to Off by selecting it and using the UP and DOWN
2
The
(or INSP
FIG. 6- MAIN MENU
The MANUAL function is
A/C
OFF
It
O to 0.2
2
Also, under
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