GE Medical Systems marquette Dash 2000, Operator'S Manual, Page: 223 / 272

Revision C Dash 2000 Patient Monitor 12-3
2005873-001
General Information
WARNINGS
APNEA EVENTS—The monitor may not detect all episodes of
inadequate breathing, nor does it distinguish between central,
obstructive and mixed apnea events.
ELECTRODE CONFIGURATION—Impedance respiration
monitoring is not reliable when ECG electrodes are placed on
the limbs.
Respiration is detected by measuring thoracic impedance. When respiration is
monitored a small AC signal is applied through ECG lead I or ECG lead II. This
AC signal appears between the right arm and left arm electrodes or the right
arm and left leg electrodes, depending on the selected ECG lead. The lead
selected is dependent on the type of ”breather” the patient is. (See the figures
below.)
NOTE: The figures below are used to show the relationship between
breathing and ECG lead. They do not represent an electrode
configuration.
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ECG Lead I for
Upper Chest Breather
ECG Lead II for
Abdominal Breather