Zeroing The Transducer - ZOLL Propaq M Operator's Manual

Chapter 11 Monitoring Invasive Pressures (IBP)

Zeroing the Transducer

To ensure that the Propaq M unit measures pressure accurately, you must zero the transducer
before each use. If you change or disconnect a transducer, you must zero the new transducer
before use. If you move a transducer to a different monitor, you must zero the transducer again,
even if you have already done so on another unit. In addition to the procedure below, follow the
transducer manufacturer's Directions for Use and your organization's established clinical
protocol.
Follow these steps when zeroing a transducer:
1. Place the transducer at the same height as the patient's left atrium.
2. Close the transducer stopcock to the patient.
Open the transducer's venting stopcock to atmospheric air.
3.
Allow the transducer a few seconds to settle.
4.
5. Use the navigation keys to highlight and select the tranducer's IBP channel and display the
IBP channel's parameter control panel:
P1
P1 Systolic Alarm
P1 Diastolic Alarm
P1 Mean Alarm
Source Label
Display Format
Select Zero Probe. The unit displays the message
6.
display.
7. The message ZEROED appears in the IBP channel's numeric display.
Close the transducer's stopcock.
8.
If the unit was unable to zero the transducer, the message ZERO REJECTED appears in the
9.
IBP channel's numeric display. The unit will not display pressure values for the IBP channel
until it has successfully zeroed the transducer and established an acceptable zero reference.
Check that the unit is open to atmospheric air and that it is properly connected to the unit, then
try zeroing the transducer again. The Propaq M unit will not zero the transducer if it detects
pulsation in the pressure channel, if there is too much noise in the signal, or if transducer's
offset is too great.
If you cannot zero the transducer after several attempts, replace the transducer or the transducer
cable.
11-4
Lower Upper
90 150
60 90
70 120
P1
S/D (M)
Zero Probe
ZEROING
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in the IBP Channel's numeric
9650-000820-01 Rev. K