Noninvasive Pacing
144
LIFEPAK 15 Monitor/Defibrillator Operating Instructions
7.
Observe the ECG rhythm. Confirm that a triangle sense marker ( ) appears near the middle
of each QRS complex. If the sense markers do not appear or are displayed in the wrong
location (for example, on the T-wave), adjust
ECG SIZE,
or select another lead. (The sense
marker location may vary slightly on each QRS complex.)
8.
Press
RATE
or rotate the
SPEED DIAL
to select the desired pacing rate.
9.
Press
CURRENT
or rotate the
SPEED DIAL
to increase current until electrical capture occurs.
Electrical capture is indicated by a wide QRS complex and a T-wave following the pace
marker. For each delivered pacing stimulus, a positive pace marker displays on the ECG
waveform.
Note:
Dashes (---), not heart rate, are displayed on the Home Screen during noninvasive
pacing, and heart rate alarms are disabled.
10.
Palpate patient's pulse or check blood pressure to assess for mechanical capture. Consider
use of sedation or analgesia if patient is uncomfortable.
Note:
To change rate or current during pacing, press
RATE
or
CURRENT
. The
RATE
and
CURRENT
buttons allow changes in increments of 10; the
SPEED DIAL
allows changes in
increments of 5.
Note:
To interrupt pacing and view the patient's intrinsic rhythm, press and hold
PAUSE
. This
causes the pacer to pace at 25% of the set rate. Release
PAUSE
to resume pacing at the set
rate.
11.
To stop pacing, reduce current to zero or press
PACER
.
Note:
To defibrillate and stop noninvasive pacing, press
CHARGE
. Pacing automatically
stops. Proceed with defibrillation.
The physiologic state of the patient may affect the likelihood of successful pacing or of skeletal
muscle activity. The failure to successfully pace a patient is not a reliable indicator of pacemaker
performance. Similarly, the patient’s muscular response to pacing is not a reliable indicator of
current delivered.
Possible Patient Skin Burns
Prolonged noninvasive pacing may cause patient skin
irritation and burns, especially with higher pacing
current levels. Discontinue noninvasive pacing if skin
becomes burned and another method of pacing is
available. For additional information about therapy
electrodes, see QUIK-COMBO Therapy Electrodes (on
page 151).
If the monitor detects
ECG LEADS OFF
during pacing, pacing automatically switches to
nondemand and continues at a fixed rate until the ECG lead is reattached. During nondemand
pacing, the pacemaker delivers pulses at the set pace rate regardless of any intrinsic beats that
the patient may have. The monitor continues to display the pacing rate (ppm) and the current
(mA). To reestablish demand pacing, reattach the ECG lead.
While pacing, visually monitor the patient at all times—
do not
rely on the
ECG LEADS OFF
warning to detect changes in pacing function. Routinely assess for proper ECG sensing, pace
pulse delivery, electrical capture, and mechanical capture.
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