GE b30, Technical Reference Manual

Page: 150 / 252

B30 Patient Monitor
5-24
Document no
.
2044677-001
4.4.3 NIBP Pulse Valve
How to check Pulse Valve
1. Wrap an adult cuff around a pipe and connect the cuff to the module.
2. Select Start test and push the ComWheel. The pressure rises beyond 240 mmHg and
stops. The pulse valve opens. The module counts the time it takes for the pressure to go
down from 240 mmHg to 50 mmHg and displays it on the screen.
3. The test can be manually stopped by selecting Stop test .
4. The valve can be adjusted between 0 and 255 (0 for fully closed and 255 for fully open).
First select
Set Valve and push the ComWheel. See the pulse valve value and adjust it by
turning the ComWheel. Then push the ComWheel to confirm the value.
5. The Interval 240 mmHg -> 50 mmHg time should be less than 60 seconds when the valve
is 150 and less than 10 when fully opened (255). When fully closed (0), the system should
be airtight and the pressure should not drop. Depending on the patient, the pulse valve
may remain closed up to approximately the value 100.
If the measured time deviates much from those above, the pulse valve or its tubes are faulty.
Start test is for starting and Stop test is for
stopping the test.
Set Valve lets you adjust the opening of the pulse
valve.
Pulse Valve Data
For information on general items Pressure , Zero ,
Protect handle , Calibr. prot. , +15 V power , AD0 to
AD7 as well as Timeouts etc., see section ”NIBP
Module.”