Welch Allyn 901061 Propaq LT Vital Signs Monitor - User Manual User Manual
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Specifications
Welch Allyn Propaq LT Vital Signs Monitor
Lead
-
fail sense current
70 nA DC typical for active leads
140
-
280 nA DC typical for reference electrode, depending on number attached.
Tall T
-
wave rejection
Meets AAMI (USA) EC13
-
2002, section 4.1.2.1.c, up through 1.2 mV, using AAMI test
waveform
Common mode rejection
FILTER function OFF
FILTER function ON
< 1 mV p
-
p RTI for 10V rms, 50/60 Hz into unbalanced input
< 30
V p
-
p RTI for 10V rms, 50/60 Hz into unbalanced input
Input impedance
> 2.5 M
single
-
ended @ 60 Hz
Input range (AC)
10 mV peak
-
to
-
peak (local display)
10 mV peak
-
to
-
peak (Acuity)
Input range (DC)
Up to ±500 mV
Accuracy of input signal
reproduction -
Impulse response
Requires ECG bandwidth to be set to extended mode.
ANSI/AAMI:EC 13:2002, Sec 4.2.8.9.c
System noise
30 µV peak
-
to
-
peak, RTI notch filter on
Baseline recovery (trace
restore)
Automatic
QRS detector
Adult or pediatric amplitude range: 0.22 to 5.0 mV (RTI)
Neonate amplitude range: 0.1 to 5.0 mV
Adult width range (duration): 70 to 120 msec
Pediatric or neonate width range (duration): 40 to 120 msec
HR range (in all patient modes) 25 to 350 beats/min (measurement)
25 to 300 beats/min (display)
Alarm limits
25 to 298 beats/min (lower)
27 to 300 beats/min (upper)
HR resolution
1 beat/min
HR alarm resolution
5 beats/min
HR meter response time
Responds to change in heart rate within 13 seconds depending on physiological
waveform. (As measured per AAMI standard EC13
-
2002 clause 5.1.2.1 (f), including
4.1.2.1 parts f. and g. waveforms.) Includes 1
-
second readout update interval.
HR accuracy
±3 beats/min or 3%, whichever is greater
HR display update interval at
monitor
1 second
AAMI HR response to
“ineffectively paced QRS
pattern”
Indicates rate of 30 to 46 during AAMI EC13
-
2002 part 5.1.4 part (f), (g), and (h) tests.
NOTE: AAMI Test 5.1.4 part (f), (g), and (h): Accuracy is affected when QRS and pacer
spikes are nearly simultaneous as occasionally is the case during this test.
HR averaging method
HR = 60/(latest average interval in seconds)
For higher HR, latest avg interval = 7/8 (previous avg interval) + 1/8 (latest interval).
For lower HR, latest avg interval = 3/4 (previous avg interval) + 1/4 (latest interval).
Transition rates for choice of formula include hysteresis and are 70 and 80 beats/min.
Drift tolerance (AAMI spec.
EC13
-
2002, 4.2.6.3)
80 beats/min indicated for 80 beats/min ECG plus drift waveform
Pacer pulse display indication
Pacer indicator (dashed vertical marker) shown on screen if pacer indicator is ON; pacer
signal always shown if of sufficient amplitude.
Pacer pulse detection (i.e., for
which the monitor displays a
dashed vertical marker in
trace)
Pulses = ± 3.2 mV to ± 700 mV @ 0.1 ms and ± 2 mV to ± 700 mV @ 0.2 to 2 ms, all with
or without overshoot, in electrically quiet environment. Thresholds automatically adjust
to reject repetitive ambient noise. Pacer detector influences QRS picking even while
pacer display indication is disabled.