Operating Procedures
5-6 User Manual
DMR V4C 3.3 (User Manual) V-4 06-May-2022
6. Set the desired FiO
2
using the adjustment knob.
7. After a minimum of 1 hour of ventilation, recalibrate the sensor as described below.
Caution:
During the warm up period the FiO
2
readings may drift and the reading may no longer be
accurate. Always monitor the patient.
a. While ventilation continues, remove the FiO
2
sensor from the T-connector and expose it to
ambient air.
b. Using a gloved hand or tubing cap, ensure the T-connector opening is plugged during this time
to ensure uninterrupted breath delivery to the patient.
c. Shake the sensor in ambient air for 45 seconds.
d. Immediately use the V4C-560 Ventilator screen to calibrate the sensor per instructions in the V4C-
560 Ventilator Clinician’s Manual Section 10.3 Calibrating the FiO
2
Sensor.
Note:
Always continue normal ventilation during recalibration.
Caution:
The duration of shaking of the sensor affects the accuracy of calibration, therefore
following the directions in this manual will ensure the most accurate readings of the
sensor. If the sensor is shaken less than the suggested amount residual oxygen on the
sensor may affect calibration. If the sensor is shaken for longer than recommended, the
sensor will cool and this may impact the calibration.
8. Return the sensor to T-connector.
9. If necessary, adjust the delivered FiO
2
with the adjustment knob.
Caution:
If at any point during ventilation the mode or settings are significantly changed, recalibrating
the sensor at the new settings will provide the most accurate reading. Wait at minimum 15
minutes from the time the settings were changed to recalibrate the sensor. Follow the
directions in Step 7 for the best calibration results.
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