B- Performance Checks; 1- Setup Menu; Oxygen Sensor Calibration; Leak Test - BIO-MED DEVICES Crossvent-2i+ Operation & Service Manual

VIII. M A I N T E N A N C E

B- PERFORMANCE CHECKS

WARNING: If the CROSSVENT fails any of the following performance checks,
remove the unit from patient service and submit for maintenance.

1- SETUP MENU

Turn on the unit and press the SETUP key.
O X Y G E N S E N S O R C A L I B R A T I O N
NOTE: Due to the fact that O2 sensors sometimes change output over time once exposed to
atmosphere, a calibration should be performed once a month in order to assure optimal accuracy. When
the sensor is consumed and does not calibrate properly, it should be discarded and a new sensor
installed and calibrated.
With the O Sensor cable plugged into the rear of the CROSSVENT and the sensor open to atmosphere (not in the circuit
2
tee), press the OXYGEN key.
If the sensor has been exposed to a higher level of oxygen than just air in the last 5 minutes or so, then wait 3-4 minutes for
the sensor to acclimate and then press the 21% key. Otherwise, you may press the key immediately. When the 21% is
calibrated, it will return to the OXYGEN menu and the 21% key will be green.
Connect the oxygen sensor tee to the patient connector on the rear of the Crossvent and to it connect a breathing circuit
with a test lung.
With the O sensor cable still plugged into the ventilator, install the O
2
Apply 100% oxygen to the ventilator input and set 15 cmH
Wait 3-4 minutes and then push the 100% key. When the 100% is calibrated, it will return to the OXYGEN menu and the
100% key will be green.
You may now check the O
2
L E A K T E S T
(This tests the integrity of the patient circuit and its connections)
Connect the patient circuit along with a test lung to the Crossvent.
Set the PIP to its maximum setting.
Set the flow control to 10 LPM. Press enter.
The Crossvent will pressurize the system and indicate "TESTING", followed by either "PASSED" or "FAILED" depending
on the results. If it fails the test, check the patient circuit and all connections, and retest.

2- CALIBRATION (CAL) MENU

If in the SETUP Menu, press the CAL key, otherwise turn the unit off and back on and press SETUP and then the CAL
menu key.
K E Y S
Press KEYS. Press on the display in various locations. Each time it is pressed in a different location, the coordinates
displayed should change. If any location pressed fails this test, submit for service. Push CAL MENU to return to the CAL
Menu.
D I S P L A Y
Press the DISPLAY key. The display will illuminate allowing you to check for missing pixels. Some randomly missing pixels
is considered acceptable.
F L O W V E R I F I C A T I O N
NOTE: For greatest accuracy, verify flow using a 60% O2 gas supply, making certain that the
pressure to the CROSSVENT inlet remains within specified pressure limits (17-55 psi; 117 – 380
kPa) at all flows.
Turn the PIP knob fully clockwise. Make certain that the proximal airway pressure line and the pneumotach (if so equipped)
are connected. Connect the patient hose to a certified flow measurement instrument. In the Cal menu, select VALVES and
turn on Valve "A".
With the supply pressure maintained as defined in the preceding NOTE, turn the L/min (Flow) Knob to its maximum
setting and verify the flow indicated by the test instrument is within 13.5 – 16.5 LPM.
After verifying the maximum flow, adjust the L/min knob to various flow levels, some high and some low, and verify that
the flow displayed in this menu is within ±10% of the actual flow as indicated by the test instrument.
A N D S E R V I C E -
% readings in the Alarm Menu using a calibrated O
C O N T .
sensor into the tee.
2
O of PEEP and 5 LPM flow.
2
blender or Test Setup.
2
45