Agilent Technologies EXG Betriebsanweisung Seite 116

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PageWriter 200/300pi M1771A/1770A Cardiograph 6-1
6
6 Troubleshooting
Your cardiograph is designed for reliable operation. If you have problems
with an ECG, there are several things you may check before calling for ser-
vice. This chapter tells how to solve basic ECG problems.
Checking ECG Technique
Many problems in taking an ECG may be related to electrode application.
l Review “Preparing the Patient” in “Recording an ECG” to ensure
the patient leads are properly attached to the patient.
l Refer to “Checking Signal Quality” in “Recording an ECG” for
information about ensuring a good recording by using the preview
screen.
A dotted line, known as a “leads off” trace will appear on the display when
there is a poor connection between the electrode and the patient. Use the fol-
lowing table to identify and correct the connection:
Table 6-1: Identification of Leads Off Connections
Symptom Check Electrode
All 12 leads show discontinuities or
dashed lines
RL or N (right leg) electrode or
cable wire
All leads except I show discontinui-
ties or dashed lines
LL or F (left leg) electrode or
cable wire
All leads except II show discontinui-
ties or dashed lines
LA or L (left arm) electrode or
cable wire
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