AccuPulse NIBP Simulator Руководства по эксплуатации - Страница 11
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Печатать страницуMot tab Cont'd
F2 selects Frequency parameter for adjustment.
F3 selects Amplitude parameter for adjustment.
Up / Down arrow keys adjust the value of the highlighted parameter.
Amplitude range is 1-8
Sinewave Motion Frequency range is 1-25 Hz
Figure M2 shows the BPTest screen with Motion turned on.
Toggle motion artifact on and off while in BPTest Mode by pressing F1. Figure M2 shows
the resulting "M" in the upper-right corner of the screen, followed by 5Hz, indicating the
motion artifact frequency. Also, there is an 8 to the right of the 5Hz indicating the motion
is of amplitude 8
These Motion settings are retained (and used when turned on by F1) for testing any
patient type,in any BPTest mode, until power is cycled.
ArrythTab (Arrhythmia)
This is an optional software upgrade
The Arrhythmia option provides variable missed pulses during simulation.
Figure A1 shows the Arrhythmia Tab screen.
F1 (Delay) selects Delay parameter for adjustment.
F2 selects Frequency parameter for adjustment.
Up / Down arrow keys adjust the value of the highlighted parameter.
F4 turns the arrhythmia on or off.
Delay range is 2.0 – 8.0 seconds, in steps of 0.5 seconds
Frequency range is 1 - 19 pulses out of 20 that the Delay setting will be applied to.
Example: A normal simulation at 60 BPM delivers pulses at 1 second intervals.
With Asystole set to 5.5 seconds and Frequency set to 3/20 :
There will be a 5.5 second delay added to the time between the first three pulses out of
20.
After 20 pulses total the pattern will repeat.
These Arrhythmia settings are retained for testing any patient type,in any BPTest mode,
until power is cycled.
Leak Test Mode
The Leak Test Mode allows the user to evaluate the system under test for leaks and to
help determine the source of any leaks. If this rate exceeds the manufacturers'
specifications, performing the test again while isolating portions of the pneumatic circuit
will guide the user to the leaking component.
While this test is running, you can also check the Static Calibration of your NIBP
monitor. Compare the AccuPulse manometer in the upper right corner to the pressure
on the NIBP monitor.
F1 (Zero) will zero the AccuPulse.
F2 (Reset) will reset the Leak Test. NOTE: Results remain displayed until a new test is
started.
F3 (Start) start the Leak Test.
F4 (Auto) / F4 (Manual) toggles between automatic using the internal pump, or manual
mode using the inflation bulb.
The button label states the current mode, Auto is the default.
Fig. M2
The Menu key opens the Leak Test Configuration screen where 3 user presets can be
stored.
Note: There should always be a pressure volume in-line with the AccuPulse
and the device under test. Either a pressure chamber (such as Clinical
Dynamics' 250ml pressure chamber) or an NIBP cuff should be used to
perform this test. Consult the monitor service manual as the manufacturer
may specify a certain fixed volume to use. Changing volumes changes the
meaning of the test.
Because the total leak rate in (moles of air / minute) cannot be directly
measured by this instrument, reasonable efforts should be made to
standardize the total volume of air used in the test. Then, a leak rate of x
mmHg / minute translates into a real leak rate, calculable in moles /
minute. If the cuff hose is used without a pressure chamber, the same
number of moles leak rate (with a chamber) per minute is proportional to
a leak rate scaled by :
(Volume Chamber + Volume Hose) / VolumeHose.
This can give leak rates of 50-100 times the leak rate with a chamber.
Furthermore, the automated mode pressure inflation algorithm will not
work with arbitrarily small volumes. If the leak rate is desired at a higher
precision start value, it may need to be performed manually when using a
small volume. Even here, the technician is cautioned to use the SAME
Fig. A1
volume every time; changing from an 8 foot to a 10 foot hose could change
the test results by nearly 20 percent.
If testing leak with a cuff, the time to settle at the initial (start) pressure
may be over a minute. A fixed volume chamber will provide much faster
settling.
Auto Leak Test
Figure LT1 shows the Leak Test Auto mode.
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Fig. LT1