Datascope System 98 Service Manual page 13

1.2.4 PATIENT WAVEFORMS KEYS
IAB TMPLATION JAB DEFLATION
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KEYS 18
17. ECG LEAD/EXT.
18.
19.
20.
Press to select the desired ECG signal source. The System 98 accepts a
5-leadwire patient cable and this key sequentially selects skin lead
configuration I, II, III, aVR, aVL, aVF, and V. A 3-leadwire patient cable
can be used, but will provide only leads I, II, and HI. All other lead
selections will provide a "Lead Fault" condition with no ECG waveform. In
addition to the skin lead configuration an external monitor can be selected as
an ECG source. When an external ECG signal is selected, "EXTERNAL" is
posted in the "lead" field on the display. This key is disabled when the
display is frozen.
PRESSURE SOURCE
Press to select the desired pressure signal source. When an external pressure
signal is selected, "EXTERNAL" is posted in the "Pressure Source" field on
the display. If a direct transducer source is selected, "X DUCER" is displayed.
This key is disabled when the display is frozen.
INFLATION INTERVAL
While in the Assist Mode, press and hold to view the period of diastolic
augmentation. The marked and highlighted portion identifies the balloon
inflation period. When the key is quickly pressed and released, the physiological
pressure delay to the pressure monitoring site 1s recalculated, with respect to
balloon inflation. The recalculation occurs in synchrony with the pump cycle.
FREEZE DISPLAY
Press to freeze all traces on the display. Press again to unfreeze the traces.
This key is disabled when the recorder is activated. When the traces are
frozen and the recorder is activated, the freeze is overridden. The ECG gain,
pressure source, and lead keys are disabled when in the freeze mode.
System 98 Service Manual
Chapter 1, Operation
1-9