User's Manual

Table Of Contents
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3-16
T
ELEMETRY TRANSMITTER (96281)
ECG
AND SP O
2
heart rate is calculated using the QRS complexes detected within
the last five seconds on ECG data. Averaging is performed within
the five second window. The heart rate shown on the screen is
updated approximately every 1.8 seconds.
The on-transmitter heart rate display has been tested according to
IEC 60601-2-27:2011 for:
Tall T-wave rejection: It rejects T-waves up to 75% of the QRS
complex amplitude,
Maximum response times, to the nearest second, to step
changes in heart rates:
- 5 seconds when the heart rate changes from 80 beats per
minute to 120 beats per minute.
- 5 seconds when the heart rate changes from 80 beats per
minute to 40 beats per minute.
Heart rate accuracy and response to irregular rhythms:
The heart rates that show on the display for the four irregular
rhythm test waveforms within the standard are listed in Table 3-
4.
Note:
The on-transmitter heart rate is calculated using the ECG Lead
currently being shown on the transmitter display.
Display Details at the Host Monitor
Signal detection is indicated on your monitor when an ECG signal
appears next to the ECG parameter key in the zone assigned to
receive the transmitted telemetry channel. The transmitter's channel
number is always identified above the waveform, to the left of the
ECG key.
Table 3-4 Heart Rates for Four Irregular Rhythm Test Waveforms
Test Wave for m
Heart Rate Shown
On Transmitter
A1 80
A2 63
A3 119
A4 86
The on-transmitter heart rate display accuracy may be
affected by cardiac arrhythmias and pacemaker pulses. The
heart rate shown on a central station or bedside monitor may
similarly be affected. Refer to their manuals for appropriate
details.