Fukuda Denshi DynaScope 7000 Series, Service Manual

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The baseline of the thermodilution curve is moved to the minus side. The “Lower Fault”
message is displayed on the monitor.
Cause : The blood temperature has not returned to a stable condition after the measurement.
30sec.
(60sec.)
30% of the peak value
Peak Point
The thermodilution curve did not return to the cut off point soon enough. The
temperature must return to a point that is 30% of the peak value within 30 seconds (or
60 seconds depending on the setup).
Solution : If performing continuous measurement, wait for 30 to 60 seconds and check the
“Ready” display before performing the next measurement.
The thermodilution curve is low. The “Peak Fault” message is displayed on the monitor.
Cause : The peak of the thermodilution curve cannot be detected.
22sec.
(45sec.)
After injection, the peak of the thermodilution curve is not determined within 22
seconds (when the time scale is “30 sec”) or 45 seconds (when the time scale is “60
sec”).
Solution : The thermistor may be in contact with the pulmonary artery wall. Reposition the
thermistor and measure again.
The “Upper Fault” message is displayed on the monitor.
Cause : After the injection, the blood temperature is out of the measurement range.
0.1
℃
15sec.
(30sec.)
After injection, the blood temperature is out of the measurement range.
The thermodilution curve did not rise above 0.1
°
C within 15 seconds (when the time
scale is “30 sec”) or 30 seconds (when the time scale is “60 sec”).
Solution : Use the iced injectate, and measure again.
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