12 Monitoring Invasive Pressure
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CAUTION
When using high frequency ventilation, ensure that the tubing from the ventilator does not touch the
arterial line, or connect with it indirectly, while zeroing the pressure. This could cause small pressure
variations which can interfere with the zero procedure.
Using the Zero Hardkey
Pressing the Zero hardkey for two seconds on the M1006B Pressure module starts a zero for the
pressure currently measured with the module.
Pressing the Zero hardkey for two seconds on the M3001A Multi-Measurement module zeros the
pressure being measured by the Multi-Measurement module and the pressures from any connected
MMS extensions.
Zeroing All Pressures Simultaneously
WARNING
Before zeroing all pressures, make sure that all pressure transducers are vented to atmospheric
pressure.
If you are measuring pressures with more than one measuring device, using the Zero Press SmartKey
to initiate the zeroing calls up a list of all active pressures. Select the pressure you want to zero or select
All Press to zero all pressures simultaneously.
Troubleshooting the Zero
The status line lists the probable cause of an unsuccessful zero:
Message Corrective Action
unable to zero - equipment
malfunction
The hardware is faulty. Contact your service personnel.
unable to zero - excessive
offset
Make sure the transducer is vented to air and try again. If this fails,
the hardware may be faulty. Replace the adapter cable and try again.
If it fails, replace the transducer and try again. If it still fails, contact
your service personnel.
unable to zero - unstable
signal
unable to zero - no
transducer
Make sure that the transducer is connected and try again. If this fails,
exchange the adapter cable and try again. If this fails, exchange the
transducer.
unable to zero - pulsatile
pressure
Make sure that the transducer is vented to air, not to the patient, and
try again.
unable to zero - timed out Try pressing the Zero hardkey or Zero <Press Label> key again. If
this fails, replace the transducer and adapter cable and contact your
service personnel.
Switch on first Pressure measurement is switched off. To switch it on, in the Setup
<Press Label>
menu, select the pressure's label.
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