Rate; Simv Rate; Backup Rate; Tidal Volume (Tv) - BIO-MED DEVICES CROSSVENT-3+ Operation & Service Manual

III. SPECIFICATIONS, CONNECTIONS & USER INTERFACE cont'd.
R A T E R A T E R A T E R A T E
Sets the normal respiration rate. It is adjustable from 5 to 150 bpm, which is changed using the arrow keys.
When in SIMV, this changes to SIMV RATE and when in CPAP, to BACKUP RATE.
S I M V R A T E S I M V R A T E S I M V R A T E S I M V R A T E
When in SIMV mode, the RATE key becomes the SIMV RATE key. It sets the rate at which assisted breaths
are given in the SIMV mode. It may be set from 0.6 to 50 bpm, which is changed using the arrow keys.
This rate is also the backup rate in the event of apnea.
WARNING: When in SIMV, it is important to always set a correct SIMV RATE,
TIDAL VOLUME and FLOW to insure proper ventilation in case the patient
becomes apneic.
B A C K U P R A T E B A C K U P R A T E
B A C K U P R A T E B A C K U P R A T E
Sets the rate at which backup breaths are delivered when in CPAP mode in the event of apnea.
WARNING: When in CPAP, it is important to always set a correct BACKUP RATE,
TIDAL VOLUME and FLOW to insure proper ventilation in case the patient
becomes apneic.
T I D A L V O L U M E ( T V ) T I D A L V O L U M E ( T V )
T I D A L V O L U M E ( T V ) T I D A L V O L U M E ( T V )
Sets the volume of gas delivered during assisted or controlled inspirations. It is adjustable from 5 to 2500
ml, which is changed using the arrow keys. It is accurate from 50 to 2500 ml. This key may be changed to
set inspiratory time rather than tidal volume in the SETUP menu. The Setup Menu is accessible only after
turning the unit on, but before pressing any other key. Press the Setup key and then press TV/INSP. The
currently preferred parameter, Tidal Volume in this case, is will be highlighted. Press INSP TIME if you
want to set an inspiratory time rather than tidal volume. Return to the Main Menu by pressing the Setup
Menu key and then the Main Menu key twice. INSP will now be displayed where TV was.
I N S P I N S P I N S P I N S P
Sets the inspiratory time. It may be set from 0.1 – 3 seconds. This key may be changed to set tidal volume
rather than inspiratory time by selecting TV in the SETUP menu. The Setup Menu is accessible only after
turning the unit on, but before pressing any other key . Press the Setup key and then press TV/INSP. The
currently preferred parameter, INSP TIME in this case, is will be highlighted. Press TIDAL VOLUME if
you want to set a tidal volume rather than inspiratory time. Return to the Main Menu by pressing the Setup
Menu key and then the Main Menu key twice. TV will now be displayed where INSP had been.
I , E , I / E K E Y I , E , I / E K E Y
I , E , I / E K E Y I , E , I / E K E Y
This is a display key for informational purposes only. It cannot be used to set any parameter, but rather is
used to display the corresponding inspiratory time, expiratory time and I:E ratio that result from setting the
Rate, Tidal Volume (or INSP, if available) and Flow. When INSP replaces TV in the key above, as explained
in the section defining the Tidal Volume key, then TV (Tidal Volume) is displayed here rather than
Inspiratory time. Segments of this key will indicate alarm conditions as defined in the ALARMS section of
this manual.
F L O W K E Y F L O W K E Y
F L O W K E Y F L O W K E Y
Displays the inspiratory flow that is set with the Flow control knob. Because the software uses a separate
calibrated table for entrainment flow, this value will change when entrainment is turned on and off. If tidal
volume is set in the key above this, then changing the flow will change the inspiratory time by necessity to
maintain the same tidal volume.
Conversely, if inspiratory time is set rather than TV, then changing the flow will change the tidal volume
accordingly. In this case, however, the I:E remains constant because both inspiratory and rate are fixed.
WARNING: In rare instances, when using the Crossvent with an air/oxygen blender,
there may be a reduction in the delivered flow at the higher flow settings.
reduction may occur when the blender is set below 30% or above 90% O
Crossvent is set to flows above 80 lpm. Lower supply pressures to the blender will
tend to decrease the flow further so be sure these supply pressures are maintained at
45- 75 PSI (310-517 kPa). If the Crossvent has the exhaled tidal volume monitoring
feature, it is recommended this be used to ensure proper tidal volumes are being
delivered. If it does not have this feature, then an external spirometer is
recommended.
This, in turn, will also change the I:E since the rate is also fixed.
This
and the
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