11 Monitoring Invasive Pressure
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When you see the message <Press Label> zero done at <date and time> on the status line,
close the stopcock to atmospheric pressure, and open the stopcock to the patient.
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
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