St. Jude Medical Merlin PSA EX3100, Руководство пользователя

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Merlin™ PSA Help Manual 5-3
Intrinsic Signal Amplitude and Slew Rate
Measurements
The Intrinsic Signal Amplitude measures the P/R-wave baseline-to-peak. To retrieve an intrinsic signal
amplitude and a slew rate measurement:
1. Confirm that the patient has intrinsic activity.
The real-time intrinsic signal amplitude and slew rate measurements are shown on the P/R-wave
Slew Rate button and as Markers on the Rhythm Display. If an intrinsic rhythm is not sensed within
2 seconds, the button shows “---”.
2. Press the P/R-wave Slew Rate button.
The Merlin PSA saves the measurements and displays them to the right of the button. Each time
you press the P/R-wave Slew Rate button, the saved measurement is shown to the right of the
button.
You can view and store intrinsic signal amplitude and slew rate measurements for each channel as
many times as desired. Up to five measurements for each channel are saved and can be included in
the PSA report. Once five measurements for a single channel are saved, the next measurement
saved for that channel replaces the oldest saved measurement for that channel.
When you initially enable pacing for a particular channel, the Merlin PSA measures and saves the most
recent intrinsic signal amplitude and slew rate, unless the measurements have been previously saved.
Accessed From: Lead Tests button
Lead Impedance Measurements
When you initially enable pacing for a particular channel, the Merlin PSA measures and saves the lead
impedance result.
The Merlin PSA displays the real-time impedance measurements on the Impedance button and the
most recently saved measurements to the right of the button. You can also see the impedance
measurement in the Rhythm Display. The Merlin PSA updates the measurement with every beat. If
there is no paced pulse within two seconds, the button shows “---”.
You can also measure impedance in an asynchronous mode, such as AOO, VOO, and DOO.
To save a lead impedance measurement, select the impedance button. You can update a lead
impedance measurement for each channel as many times as desired. Up to five measurements for each
channel are saved and can be included in the PSA report. Once five measurements for a single channel
are saved, the next measurement retrieved for that channel replaces the oldest saved measurement for
that channel.
CAUTION
Ensure the lead is connected to the appropriate channel. If you
inadvertently reverse the connections, the Merlin PSA may deliver
inappropriate or harmful stimulation and display inaccurate intrin-
sic signal measurements.