Data Critical Corporation 02DT-7000 User Manual

TROUBLESHOOTING

218

PatientNet Operator’s Manual, v1.04, 10001001-00X, Draft

All information contained herein is subject to the rights and restrictions on the title page.

Example 12 - False Asystole Alarm

Problem

Small R-Wave Voltage

1. When R-waves are small, the system might not see the signal. A false positive

asystole call and alarm may occur.

Fig. 108. Example 12 - Small R-Wave Voltage

Correction

1. Resolve this by moving the electrodes to a different lead configuration, such

as closer to the heart, to achieve a stronger signal. Increasing the size on the
waveform display will not remedy this situation.

Note:

In this situation, the arrhythmia system is using Lead II for analysis and,
although it is of small amplitude, the system is working well.

Example 13 - Excessive Pacer Pulses

The strip has a “picket fence” appearance. Note the pulses on the ECG waveform.

Fig. 109. Example 13 - Picket Fencing

This is more easily noted on real-time strips or in the history.

Telectronics manufactures an impedance-based pacemaker that measures the respira-
tion rate and adjusts the pacemaker accordingly. This type of pacemaker emits imped-
ance pulses (18-20 Hz) for adjusting the pacemaker rate based on the patient’s
respiration rate. The front-end device may detect such impedance pulses as pacemaker