Philips M3500B manual Demand Mode Versus Fixed Mode, Monitoring During Pacing

Demand Mode Versus Fixed Mode

Demand Mode Versus Fixed Mode

The HeartStart XLT can deliver paced pulses in either demand or fixed mode.

In demand mode, the pacer only delivers paced pulses when the patient’s heart rate is lower than the selected pacing rate.

In fixed mode, the pacer delivers paced pulses at the selected rate.

WARNING

WARNING

Monitoring During Pacing

Multifunction defib electrodes pads can not be used to monitor the ECG and deliver paced pulses simultaneously. The HeartStart XLT always uses the 3- or 5-lead ECG cable and monitoring electrodes as the source of ECG during pacing.

In demand mode, ECG electrodes must be used, because the HeartStart XLT uses the R-wave detection from this monitoring source to determine if a paced pulse should be delivered.

In fixed mode, ECG electrodes may or may not be used; however, an ECG will only be displayed if ECG monitoring electrodes are used.

Use demand mode pacing whenever possible. Use fixed mode pacing when motion artifact or other ECG noise makes R-wave detection unreliable.

Heart rate displays and alarms function during pacing, but they can be unreliable. Observe the patient closely while pacing. Do not rely on heart rate alarms or the indicated heart rate as a measure of the patient’s perfusion status.

8-2 Pacing