Philips Efficia DFM100 - Functional Descriptions; ECG Monitoring Functions; Leads ECG; Pads;Paddles ECG

Functional Descriptions B: Theory of Operation
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Functional Descriptions
This section is organized into the following sections:
 ECG Monitoring Functions . . . . . . . . . . . . . . . p. 195
 Patient Impedance Functions . . . . . . . . . . . . . . . p. 196
 Defibrillation . . . . . . . . . . . . . . . . . . p. 196
 Transcutaneous Pacing . . . . . . . . . . . . . . . . p. 197
 EtCO2 . . . . . . . . . . . . . . . . . . . . p. 198
 Audio . . . . . . . . . . . . . . . . . . . . p. 198
 Data Storage . . . . . . . . . . . . . . . . . . p. 198
ECG Monitoring Functions
There are two separate ECG front ends: one for signals coming in on the paddles or pads cable, and one
for signals coming in on the 3- or 5-lead ECG cable.
Leads ECG
The ECG signal picked up by the ECG monitoring electrodes is carried by the ECG cable to the ECG
port, and then to the Processor PCA, where it is amplified, filtered, and digitized.
The Processor PCA then performs digital signal processing on the ECG data, and is responsible for:
• Formatting and presenting the ECG to the display and to the printer.
• Counting heart rate and generating heart rate alarms.
• Reporting on the status of the patient connection, and alerting the user to measurement problems.
• Arrhythmia analysis and alarms.
Pads/Paddles ECG
The ECG signal picked up by the paddles or disposable defibrillation pads is carried by the cable to the
Therapy port via the Therapy PCA, where it is amplified, filtered, digitized and passed across a patient
isolation barrier before being passed to the Processor PCA.
The Processor PCA then performs digital signal processing on the ECG data, and is responsible for:
• ECG waveform analysis and Shock Advisory (in AED Mode).
• Formatting and presenting the ECG to the display and to the printer.
• Counting heart rate and generating heart rate alarms.
• Reporting on the status of the patient connection.