AVEA ventilator systems Chapter 2: Unpacking and Setup 19
L2786 Rev. M
Hot Wire Flow Sensor Zero Procedure
It is recommended that this procedure is done when installing a new hot wire flow sensor and as a possible remedy to a
drifting waveform baseline.
The standard hot wire flow sensor is suitable for neonatal and pediatric applications where the peak inspiratory flow rate
is less than 30 L/min. This flow sensor is not active in adult applications. The following procedure describes how to reset
or re-zero the Hot Wire Sensor offset.
To reset or re-zero the Hot Wire Sensor offset:
1. Select Utility from the screens menu.
2. Select the Monitoring tab from the Utility screen
3. Press the Zero Sensor button under the Hot Wire Flow Sensor section.
4. Remove the hot wire flow sensor from the patient circuit.
5. Block both ends of the flow sensor with your gloved fingers so no flow occurs.
6. While holding the sensor steady (without movement), press the Continue button.
7. Wait for the Zero Sensor Completed message to appear.
8. Reinstall the hot wire flow sensor into the patient circuit.
9. If the flow sensor continues to drift or read inaccurately, repeat this procedure or replace the flow sensor.
Note:
The above steps must be executed in the proper sequence. If the test is repeated, only the last value measured is
saved. The saved value will then be applied to all future measurements of flow and volume that use this flow sensor.
This procedure will not “fail” but is limited on the offset amount it can correct for. If the hot wire flow sensor continues to
drift or read inaccurately after completing this procedure, the offset value is being limited and the sensor should be
cleaned or replaced.
Variable orifice flow sensors are also available on some AVEA models. The neonatal VarFlex flow sensor is compatible
in neonatal and pediatric applications where the peak inspiratory flow rate is less than 30L/min and is not active in adult
applications. For adult and large pediatric applications a Pediatric / Adult VarFlex flow sensor is available for use with
patients whose flow requirements fall within the range of 1.2 – 180 L/min.
Detailed information on the specifications of each flow sensor can be found in Appendix E: Sensor Specifications and
Circuit Resistance.
To Next Page
Loading...
