III. SPECIFICATIONS, CONNECTIONS & USER INTERFACE cont’d.
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ALARM QUIET will automatically be canceled and the audible alarm will return. If Alarm Quiet is pressed
with no alarm conditions existing at the time, then any new alarm will be silenced while it is active.
ARROW KEYS
ARROW KEYSARROW KEYS
ARROW KEYS
These are used to scroll up and down, at an accelerating rate, any numerical parameter that is selected and
highlighted. When the value being changed reaches its upper or lower limit as allowed by the software, it
stops scrolling and a tone sounds.
NOTE: While scrolling, some hesitation may be observed.
SIGH
SIGHSIGH
SIGH
Press this key to activate SIGH. It will change from SIGH OFF to SIGH ON. Beginning with the next
breath after activation, one sigh breath is provided for every 100 normal breaths or one every 7 minutes,
whichever occurs first. The tidal volume for this breath is equal to 1.5 times the normal tidal volume. This
is accomplished by increasing inspiratory time for that breath. There is a tidal volume cap of 2500 ml and
an inspiratory cap of 3 seconds for sigh breaths. The expiratory time following a sigh is also increased to
maintain the same I/E ratio as a normal breath. Each time a sigh breath is delivered, “SIGH BREATH” is
displayed in this key. Sigh is operative only in the Assist Control and SIMV modes.
POWER SOURCE KEY
POWER SOURCE KEYPOWER SOURCE KEY
POWER SOURCE KEY
This key indicates whether the unit is operating on external or battery power.
EXTERNAL POWER- Displays “EXTERNL” whenever external power is connected to the
CROSSVENT-3+.
BATTERY OPERATION- Displays “BATT” when operating on battery. Flashes “BATT” whenever
external power is lost and the CROSSVENT shifts to battery power. When this happens, a simultaneous
audible alarm sounds which may be silenced only by pressing this key
. Restoration of external power
will automatically switch the unit back to external power operation and charging of the battery will
commence. Charging will continue until a full charge is reached.
Whenever the CROSSVENT is powered on without external power, the Power Source key will alarm
alerting the user the unit is operating on battery power. This alarm will continue until the user
acknowledges this by pressing the flashing “BATT” key.
The Power Source key also displays a graphical representation of battery life remaining. It reduces in
2% increments as the battery power is depleted.
WARNING: Always operate the CROSSVENT on battery prior to use to confirm that
the battery is functioning.
CAUTION: It is recommended that the CROSSVENT never be left with its battery
discharged as this will reduce battery life. After discharge of the battery, recharge fully
before disconnecting the plug-in power supply whenever possible.
NOTE: For more on the battery, refer to Section III, Part C-3.
INSPIRATORY SOURCE K
INSPIRATORY SOURCE KINSPIRATORY SOURCE K
INSPIRATORY SOURCE KEY
EY EY
EY
This key, which is next to the Power Source key, displays the type of breath being delivered during
inspiratory.
SPONTANEOUS BREATH- Displays SPONT whenever an inspiration is initiated by the patient’s
spontaneous effort during SIMV or CPAP, delivered at PEEP or atmospheric pressure or pressurized
when pressure support is on.
ASSISTED BREATH- Displays ASSIST whenever an inspiration is initiated by the patient’s
spontaneous efforts and delivered under pressure (volume or pressure limited breath) during Assist
Control and SIMV breaths.
CONTROLLED BREATH- Displays CONTROL whenever an inspiration is initiated by the
ventilator’s timer (volume or pressure limited breath), during Assist Control, SIMV backup and CPAP
backup breaths.
MANUAL BREATH- Displays MANUAL whenever a manual breath is delivered by pressing the
MANUAL key in CPAP mode.
ENTRAINMENT ON- Below the type of breath being delivered, “ENTRN” is displayed when
entrainment is on. This is displayed continuously as long as entrainment is on.
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